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2024-05-15Merge tag 'printk-for-6.10' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux Pull printk updates from Petr Mladek: - Use no_printk() instead of "if (0) printk()" constructs to avoid generating printk index for messages disabled at compile time - Remove deprecated strncpy/strcpy from printk.c - Remove redundant CONFIG_BASE_FULL in favor of CONFIG_BASE_SMALL * tag 'printk-for-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: printk: cleanup deprecated uses of strncpy/strcpy printk: Remove redundant CONFIG_BASE_FULL printk: Change type of CONFIG_BASE_SMALL to bool printk: Fix LOG_CPU_MAX_BUF_SHIFT when BASE_SMALL is enabled ceph: Use no_printk() helper dyndbg: Use *no_printk() helpers dev_printk: Add and use dev_no_printk() printk: Let no_printk() use _printk()
2024-05-13sh: setup: Add missing forward declaration for sh_fdt_init()Geert Uytterhoeven
arch/sh/kernel/setup.c:244:12: warning: no previous prototype for 'sh_fdt_init' [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/7e3ea09e706a075bceb6bfd172990676e79be1c2.1715606232.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-13sh: smp: Protect setup_profiling_timer() by CONFIG_PROFILINGGeert Uytterhoeven
arch/sh/kernel/smp.c:326:5: warning: no previous prototype for 'setup_profiling_timer' [-Wmissing-prototypes] The function is unconditionally defined in smp.c, but conditionally declared in <linux/profile.h>. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/effa5eecbd2389c6661974e91bb834db210989ea.1715606232.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-13sh: of-generic: Add missing #include <asm/clock.h>Geert Uytterhoeven
arch/sh/boards/of-generic.c:146:20: warning: no previous prototype for 'arch_init_clk_ops' [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/942621553ed82e3331e2e91485b643892d2d08bc.1715606232.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-13sh: dreamcast: Fix GAPS PCI bridge addressingArtur Rojek
The G2-to-PCI bridge chip found in SEGA Dreamcast assumes P2 area relative addresses. Set the appropriate IOPORT base offset. Tested-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Artur Rojek <contact@artur-rojek.eu> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20240511191614.68561-2-contact@artur-rojek.eu Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-06printk: Remove redundant CONFIG_BASE_FULLYoann Congal
CONFIG_BASE_FULL is equivalent to !CONFIG_BASE_SMALL and is enabled by default: CONFIG_BASE_SMALL is the special case to take care of. So, remove CONFIG_BASE_FULL and move the config choice to CONFIG_BASE_SMALL (which defaults to 'n') For defconfigs explicitely disabling BASE_FULL, explicitely enable BASE_SMALL. For defconfigs explicitely enabling BASE_FULL, drop it as it is the default. Signed-off-by: Yoann Congal <yoann.congal@smile.fr> Reviewed-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20240505080343.1471198-4-yoann.congal@smile.fr Signed-off-by: Petr Mladek <pmladek@suse.com>
2024-05-02sh: boot: Add proper forward declarationsGeert Uytterhoeven
arch/sh/boot/compressed/misc.c:110:6: warning: no previous prototype for ‘ftrace_stub’ [-Wmissing-prototypes] arch/sh/boot/compressed/misc.c:113:6: warning: no previous prototype for ‘arch_ftrace_ops_list_func’ [-Wmissing-prototypes] arch/sh/boot/compressed/misc.c:123:6: warning: no previous prototype for ‘decompress_kernel’ [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/b7ea770a3bf26fb2a5f59f4bb83072b2526f7134.1713959841.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: boot: Remove sh5 cache handlingGeert Uytterhoeven
Commit 37744feebc086908 ("sh: remove sh5 support") in v5.8 forgot to remove the sh5 cache handling. Suggested-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/23e9b3fd0d78e46c9fc1835852ba226aba92c3ca.1713959531.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02Revert "sh: Handle calling csum_partial with misaligned data"Guenter Roeck
This reverts commit cadc4e1a2b4d20d0cc0e81f2c6ba0588775e54e5. Commit cadc4e1a2b4d ("sh: Handle calling csum_partial with misaligned data") causes bad checksum calculations on unaligned data. Reverting it fixes the problem. # Subtest: checksum # module: checksum_kunit 1..5 # test_csum_fixed_random_inputs: ASSERTION FAILED at lib/checksum_kunit.c:500 Expected ( u64)result == ( u64)expec, but ( u64)result == 53378 (0xd082) ( u64)expec == 33488 (0x82d0) # test_csum_fixed_random_inputs: pass:0 fail:1 skip:0 total:1 not ok 1 test_csum_fixed_random_inputs # test_csum_all_carry_inputs: ASSERTION FAILED at lib/checksum_kunit.c:525 Expected ( u64)result == ( u64)expec, but ( u64)result == 65281 (0xff01) ( u64)expec == 65280 (0xff00) # test_csum_all_carry_inputs: pass:0 fail:1 skip:0 total:1 not ok 2 test_csum_all_carry_inputs # test_csum_no_carry_inputs: ASSERTION FAILED at lib/checksum_kunit.c:573 Expected ( u64)result == ( u64)expec, but ( u64)result == 65535 (0xffff) ( u64)expec == 65534 (0xfffe) # test_csum_no_carry_inputs: pass:0 fail:1 skip:0 total:1 not ok 3 test_csum_no_carry_inputs # test_ip_fast_csum: pass:1 fail:0 skip:0 total:1 ok 4 test_ip_fast_csum # test_csum_ipv6_magic: pass:1 fail:0 skip:0 total:1 ok 5 test_csum_ipv6_magic # checksum: pass:2 fail:3 skip:0 total:5 # Totals: pass:2 fail:3 skip:0 total:5 not ok 22 checksum Fixes: cadc4e1a2b4d ("sh: Handle calling csum_partial with misaligned data") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20240324231804.841099-1-linux@roeck-us.net Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: j2: Drop incorrect SPI controller spi-max-frequency propertyKrzysztof Kozlowski
The J2 SPI controller bindings never allowed spi-max-frequency property in the controller node. Neither old spi-bus.txt bindings, nor new DT schema allows it. Linux driver does not parse that property from controller node, thus drop it from DTS as incorrect hardware description. The SPI child device has already the same property with the same value, so functionality should not be affected. Cc: Kousik Sanagavarapu <five231003@gmail.com> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Tested-by: Rob Landley <rob@landley.net> Link: https://lore.kernel.org/r/20240322064221.25776-1-krzysztof.kozlowski@linaro.org Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: push-switch: Convert to platform remove callback returning voidUwe Kleine-König
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20240306211947.97103-2-u.kleine-koenig@pengutronix.de Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: sh7785lcr: Make init_sh7785lcr_IRQ() staticGeert Uytterhoeven
arch/sh/boards/board-sh7785lcr.c:298:13: warning: no previous prototype for ‘init_sh7785lcr_IRQ’ [-Wmissing-prototypes] There are no users outside this file, so make it static. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/cbe9da98a1106cdab686766e2f23f768399dbdbf.1709579038.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: sh7757: Add missing #include <asm/mmzone.h>Geert Uytterhoeven
arch/sh/kernel/cpu/sh4a/setup-sh7757.c:1240:13: warning: no previous prototype for ‘plat_mem_setup’ [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/c9c26472151d16a2ca91f14bccd64af07a6abdd8.1709579038.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: sh7757lcr: Make init_sh7757lcr_IRQ() staticGeert Uytterhoeven
arch/sh/boards/board-sh7757lcr.c:572:13: warning: no previous prototype for 'init_sh7757lcr_IRQ' [-Wmissing-prototypes] There are no users outside this file, so make it static. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/fba00424b5b0bee0f9b9cbc63d649a86854d202f.1709579038.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: mach-sh03: Make sh03_rtc_settimeofday() staticGeert Uytterhoeven
arch/sh/boards/mach-sh03/rtc.c:123:5: warning: no previous prototype for ‘sh03_rtc_settimeofday’ [-Wmissing-prototypes] There are no users outside this file, so make it static. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/95417f2a3eb1561af7c2ee064efbc3ef3f03dac3.1709579038.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: mach-highlander: Add missing #include <mach/highlander.h>Geert Uytterhoeven
arch/sh/boards/mach-highlander/pinmux-r7785rp.c:9:13: warning: no previous prototype for ‘highlander_plat_pinmux_setup’ [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/bbbc833d2c5b565122baaf9277ddf4a2f2cadead.1709579038.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: traps: Make is_dsp_inst() staticGeert Uytterhoeven
If CONFIG_SH_DSP=y (e.g. se7343_defconfig): arch/sh/kernel/traps_32.c:572:5: warning: no previous prototype for ‘is_dsp_inst’ [-Wmissing-prototypes] There are no users outside this file, so make it static. While at it, convert the dummy for the CONFIG_SH_DSP=n case from a macro to a static inline function, to increase type-safety. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/8525fe446e7f24649a83b8cd6ca8b736ab746b80.1709579038.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: cache: Move forward declarations to <asm/cacheflush.h>Geert Uytterhoeven
arch/sh/kernel/cpu/init.c:99:29: warning: no previous prototype for 'l2_cache_init' [-Wmissing-prototypes] arch/sh/kernel/cpu/sh4a/setup-sh7723.c:422:6: warning: no previous prototype for 'l2_cache_init' [-Wmissing-prototypes] arch/sh/kernel/cpu/sh4a/setup-sh7724.c:842:6: warning: no previous prototype for 'l2_cache_init' [-Wmissing-prototypes] arch/sh/mm/cache-j2.c:48:13: warning: no previous prototype for 'j2_cache_init' [-Wmissing-prototypes] arch/sh/mm/cache-sh2.c:85:13: warning: no previous prototype for 'sh2_cache_init' [-Wmissing-prototypes] arch/sh/mm/cache-sh2a.c:181:13: warning: no previous prototype for 'sh2a_cache_init' [-Wmissing-prototypes] arch/sh/mm/cache-sh3.c:90:13: warning: no previous prototype for 'sh3_cache_init' [-Wmissing-prototypes] arch/sh/mm/cache-sh4.c:384:13: warning: no previous prototype for 'sh4_cache_init' [-Wmissing-prototypes] arch/sh/mm/cache-shx3.c:18:13: warning: no previous prototype for 'shx3_cache_init' [-Wmissing-prototypes] arch/sh/mm/flush-sh4.c:106:13: warning: no previous prototype for 'sh4__flush_region_init' [-Wmissing-prototypes] arch/sh/mm/cache-sh7705.c:190:13: warning: no previous prototype for 'sh7705_cache_init' [-Wmissing-prototypes] Fix this by moving all cache-related forward declarations to <asm/cacheflush.h>, and by including the latter where needed. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/f47ab87636d16db4c47bebe1bf62650045f61989.1709579038.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: dma: Remove unused functionalityGeert Uytterhoeven
dma_extend(), get_dma_info_by_name(), register_chan_caps(), and request_dma_bycap() are unused. Remove them, and all related code. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/2beb81fdd7592a94329e3c9a6ba56959f6094019.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: dwarf: Make dwarf_lookup_fde() staticGeert Uytterhoeven
arch/sh/kernel/dwarf.c:347:19: warning: no previous prototype for 'dwarf_lookup_fde' [-Wmissing-prototypes] There are no users outside this file, so make it static. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/55e8261a354e8ec4d375754e404c6c1d303af715.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: kprobes: Remove unneeded kprobe_opcode_t castsGeert Uytterhoeven
There is no need to cast a kprobe_opcode_t pointer to a kprobe_opcode_t pointer. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/fc22b990d869fc2005990159d8072ae2774b1396.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: kprobes: Make trampoline_probe_handler() staticGeert Uytterhoeven
arch/sh/kernel/kprobes.c:299:15: warning: no previous prototype for 'trampoline_probe_handler' [-Wmissing-prototypes] There are no users outside this file, so make it static. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/42f30b7f767ee1293f6e687a605f7d907ae2daa6.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: kprobes: Merge arch_copy_kprobe() into arch_prepare_kprobe()Geert Uytterhoeven
arch/sh/kernel/kprobes.c:52:16: warning: no previous prototype for 'arch_copy_kprobe' [-Wmissing-prototypes] Although SH kprobes support was only merged in v2.6.28, it missed the earlier removal of the arch_copy_kprobe() callback in v2.6.15. Based on the powerpc part of commit 49a2a1b83ba6fa40 ("[PATCH] kprobes: changed from using spinlock to mutex"). Fixes: d39f5450146ff39f ("sh: Add kprobes support.") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/717d47a19689cc944fae6e981a1ad7cae1642c89.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: smp: Fix missing prototypesGeert Uytterhoeven
arch/sh/kernel/smp.c:173:17: warning: no previous prototype for 'start_secondary' [-Wmissing-prototypes] arch/sh/kernel/smp.c:324:5: warning: no previous prototype for 'setup_profiling_timer' [-Wmissing-prototypes] Make start_secondary() static, as it is only used in this file. Include <linux/profile.h> to fix the other warning. There are no users outside this file, so make it static. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/6b6b9a84b30ee56f57f409a7550c69d4aece5dc3.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: sh7786: Remove unused sh7786_usb_use_exclock()Geert Uytterhoeven
arch/sh/kernel/cpu/sh4a/setup-sh7786.c:411:13: warning: no previous prototype for 'sh7786_usb_use_exclock' [-Wmissing-prototypes] Upstream never had a user of sh7786_usb_use_exclock(), remove it. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/a87c6c0edcf81937b8eb2c899d286d82d71ad513.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: sh2a: Add missing #include <asm/processor.h>Geert Uytterhoeven
arch/sh/kernel/cpu/sh2a/opcode_helper.c:34:14: warning: no previous prototype for 'instruction_size' [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/8314dd9a966394dd1fd82d88095c57d9778fcfc9.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: dma: Remove unused dmac_search_free_channel()Geert Uytterhoeven
arch/sh/drivers/dma/dma-api.c:164:5: warning: no previous prototype for 'dmac_search_free_channel' [-Wmissing-prototypes] dmac_search_free_channel() never had a user in upstream, remove it. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/82d5efdde44f9489c5a7d11d0a19750445116c95.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: math-emu: Add missing #include <asm/fpu.h>Geert Uytterhoeven
arch/sh/math-emu/math.c:492:5: warning: no previous prototype for 'do_fpu_inst' [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/cfda1ba2eadb75e2793e67d43df42fe4c04e4fcf.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: nommu: Add missing #include <asm/cacheflush.h>Geert Uytterhoeven
arch/sh/mm/nommu.c:76:13: warning: no previous prototype for 'kmap_coherent_init' [-Wmissing-prototypes] arch/sh/mm/nommu.c:80:7: warning: no previous prototype for 'kmap_coherent' [-Wmissing-prototypes] arch/sh/mm/nommu.c:86:6: warning: no previous prototype for 'kunmap_coherent' [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/d4b2a43fcedddee3d27cfd87ff2e0bf511588aa0.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: ftrace: Fix missing prototypesGeert Uytterhoeven
arch/sh/kernel/ftrace.c:130:6: warning: no previous prototype for ‘arch_ftrace_nmi_enter’ [-Wmissing-prototypes] arch/sh/kernel/ftrace.c:140:6: warning: no previous prototype for ‘arch_ftrace_nmi_exit’ [-Wmissing-prototypes] arch/sh/kernel/ftrace.c:316:6: warning: no previous prototype for ‘prepare_ftrace_return’ [-Wmissing-prototypes] Fix this by moving existing forward declarations to <asm/ftrace.h>, and adding the missing forward declaration for prepare_ftrace_return(). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/910c8846a025e1c3b744a83ddf8e2816a3c5569d.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: hw_breakpoint: Add missing forward declaration for arch_bp_generic_fields()Geert Uytterhoeven
arch/sh/kernel/hw_breakpoint.c:135:5: warning: no previous prototype for ‘arch_bp_generic_fields’ [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/566af354bf51ddc38e9eb95eac51ec00c4e42024.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: traps: Add missing #include <asm/setup.h>Geert Uytterhoeven
arch/sh/kernel/traps_32.c:735:6: warning: no previous prototype for ‘per_cpu_trap_init’ [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/a7750e57cc077ca6e27d0b9bd6b123d42894bc17.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: return_address: Add missing #include <asm/ftrace.h>Geert Uytterhoeven
arch/sh/kernel/return_address.c:49:7: warning: no previous prototype for ‘return_address’ [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/45685f62c9132aca5dc3c028471218393b51f34c.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: tlb: Add missing forward declaration for handle_tlbmiss()Geert Uytterhoeven
arch/sh/mm/tlbex_32.c:22:1: warning: no previous prototype for ‘handle_tlbmiss’ [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/23ec2c88168bd5b7e294828221531eed2f3eede8.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: syscall: Add missing forward declaration for sys_cacheflush()Geert Uytterhoeven
arch/sh/kernel/sys_sh.c:58:16: warning: no previous prototype for ‘sys_cacheflush’ [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/b1c218986fb77d78303626b43c97925809045018.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: fpu: Add missing forward declarationsGeert Uytterhoeven
arch/sh/kernel/cpu/sh4/fpu.c:389:6: warning: no previous prototype for ‘float_raise’ [-Wmissing-prototypes] arch/sh/kernel/cpu/sh4/fpu.c:394:5: warning: no previous prototype for ‘float_rounding_mode’ [-Wmissing-prototypes] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/1847145fc2181313b78bea8a81e6f0269d765968.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-05-02sh: pgtable: Fix missing prototypesGeert Uytterhoeven
arch/sh/mm/pgtable.c:12:6: warning: no previous prototype for 'pgd_ctor' [-Wmissing-prototypes] arch/sh/mm/pgtable.c:34:8: warning: no previous prototype for 'pgd_alloc' [-Wmissing-prototypes] arch/sh/mm/pgtable.c:39:6: warning: no previous prototype for 'pgd_free' [-Wmissing-prototypes] arch/sh/mm/pgtable.c:45:6: warning: no previous prototype for 'pud_populate' [-Wmissing-prototypes] arch/sh/mm/pgtable.c:50:8: warning: no previous prototype for 'pmd_alloc_one' [-Wmissing-prototypes] arch/sh/mm/pgtable.c:55:6: warning: no previous prototype for 'pmd_free' [-Wmissing-prototypes] Make pgd_ctor() static, as it is only used in this file. Include <asm/pgalloc.h> to fix the other warnings. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/aa1328ea3327d6685aab76d5787cb77c996052c0.1709326528.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-03-21Merge tag 'sh-for-v6.9-tag1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux Pull sh updates from John Paul Adrian Glaubitz: "Two patches by Ricardo B. Marliere make two instances of struct bus_type in the interrupt controller driver and the DMA sysfs interface const since the driver core in the kernel is now able to handle that. A third patch by Artur Rojek enforces internal linkage for the function setup_hd64461() in order to fix the build of hp6xx_defconfig with -Werror=missing-prototypes" * tag 'sh-for-v6.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux: sh: hd64461: Make setup_hd64461() static sh: intc: Make intc_subsys const sh: dma-sysfs: Make dma_subsys const
2024-03-21sh: hd64461: Make setup_hd64461() staticArtur Rojek
Enforce internal linkage for setup_hd64461(). This fixes the following error: arch/sh/cchips/hd6446x/hd64461.c:75:12: error: no previous prototype for 'setup_hd64461' [-Werror=missing-prototypes] Signed-off-by: Artur Rojek <contact@artur-rojek.eu> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20240211193451.106795-1-contact@artur-rojek.eu Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-03-14Merge tag 'mm-stable-2024-03-13-20-04' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - Sumanth Korikkar has taught s390 to allocate hotplug-time page frames from hotplugged memory rather than only from main memory. Series "implement "memmap on memory" feature on s390". - More folio conversions from Matthew Wilcox in the series "Convert memcontrol charge moving to use folios" "mm: convert mm counter to take a folio" - Chengming Zhou has optimized zswap's rbtree locking, providing significant reductions in system time and modest but measurable reductions in overall runtimes. The series is "mm/zswap: optimize the scalability of zswap rb-tree". - Chengming Zhou has also provided the series "mm/zswap: optimize zswap lru list" which provides measurable runtime benefits in some swap-intensive situations. - And Chengming Zhou further optimizes zswap in the series "mm/zswap: optimize for dynamic zswap_pools". Measured improvements are modest. - zswap cleanups and simplifications from Yosry Ahmed in the series "mm: zswap: simplify zswap_swapoff()". - In the series "Add DAX ABI for memmap_on_memory", Vishal Verma has contributed several DAX cleanups as well as adding a sysfs tunable to control the memmap_on_memory setting when the dax device is hotplugged as system memory. - Johannes Weiner has added the large series "mm: zswap: cleanups", which does that. - More DAMON work from SeongJae Park in the series "mm/damon: make DAMON debugfs interface deprecation unignorable" "selftests/damon: add more tests for core functionalities and corner cases" "Docs/mm/damon: misc readability improvements" "mm/damon: let DAMOS feeds and tame/auto-tune itself" - In the series "mm/mempolicy: weighted interleave mempolicy and sysfs extension" Rakie Kim has developed a new mempolicy interleaving policy wherein we allocate memory across nodes in a weighted fashion rather than uniformly. This is beneficial in heterogeneous memory environments appearing with CXL. - Christophe Leroy has contributed some cleanup and consolidation work against the ARM pagetable dumping code in the series "mm: ptdump: Refactor CONFIG_DEBUG_WX and check_wx_pages debugfs attribute". - Luis Chamberlain has added some additional xarray selftesting in the series "test_xarray: advanced API multi-index tests". - Muhammad Usama Anjum has reworked the selftest code to make its human-readable output conform to the TAP ("Test Anything Protocol") format. Amongst other things, this opens up the use of third-party tools to parse and process out selftesting results. - Ryan Roberts has added fork()-time PTE batching of THP ptes in the series "mm/memory: optimize fork() with PTE-mapped THP". Mainly targeted at arm64, this significantly speeds up fork() when the process has a large number of pte-mapped folios. - David Hildenbrand also gets in on the THP pte batching game in his series "mm/memory: optimize unmap/zap with PTE-mapped THP". It implements batching during munmap() and other pte teardown situations. The microbenchmark improvements are nice. - And in the series "Transparent Contiguous PTEs for User Mappings" Ryan Roberts further utilizes arm's pte's contiguous bit ("contpte mappings"). Kernel build times on arm64 improved nicely. Ryan's series "Address some contpte nits" provides some followup work. - In the series "mm/hugetlb: Restore the reservation" Breno Leitao has fixed an obscure hugetlb race which was causing unnecessary page faults. He has also added a reproducer under the selftest code. - In the series "selftests/mm: Output cleanups for the compaction test", Mark Brown did what the title claims. - Kinsey Ho has added the series "mm/mglru: code cleanup and refactoring". - Even more zswap material from Nhat Pham. The series "fix and extend zswap kselftests" does as claimed. - In the series "Introduce cpu_dcache_is_aliasing() to fix DAX regression" Mathieu Desnoyers has cleaned up and fixed rather a mess in our handling of DAX on archiecctures which have virtually aliasing data caches. The arm architecture is the main beneficiary. - Lokesh Gidra's series "per-vma locks in userfaultfd" provides dramatic improvements in worst-case mmap_lock hold times during certain userfaultfd operations. - Some page_owner enhancements and maintenance work from Oscar Salvador in his series "page_owner: print stacks and their outstanding allocations" "page_owner: Fixup and cleanup" - Uladzislau Rezki has contributed some vmalloc scalability improvements in his series "Mitigate a vmap lock contention". It realizes a 12x improvement for a certain microbenchmark. - Some kexec/crash cleanup work from Baoquan He in the series "Split crash out from kexec and clean up related config items". - Some zsmalloc maintenance work from Chengming Zhou in the series "mm/zsmalloc: fix and optimize objects/page migration" "mm/zsmalloc: some cleanup for get/set_zspage_mapping()" - Zi Yan has taught the MM to perform compaction on folios larger than order=0. This a step along the path to implementaton of the merging of large anonymous folios. The series is named "Enable >0 order folio memory compaction". - Christoph Hellwig has done quite a lot of cleanup work in the pagecache writeback code in his series "convert write_cache_pages() to an iterator". - Some modest hugetlb cleanups and speedups in Vishal Moola's series "Handle hugetlb faults under the VMA lock". - Zi Yan has changed the page splitting code so we can split huge pages into sizes other than order-0 to better utilize large folios. The series is named "Split a folio to any lower order folios". - David Hildenbrand has contributed the series "mm: remove total_mapcount()", a cleanup. - Matthew Wilcox has sought to improve the performance of bulk memory freeing in his series "Rearrange batched folio freeing". - Gang Li's series "hugetlb: parallelize hugetlb page init on boot" provides large improvements in bootup times on large machines which are configured to use large numbers of hugetlb pages. - Matthew Wilcox's series "PageFlags cleanups" does that. - Qi Zheng's series "minor fixes and supplement for ptdesc" does that also. S390 is affected. - Cleanups to our pagemap utility functions from Peter Xu in his series "mm/treewide: Replace pXd_large() with pXd_leaf()". - Nico Pache has fixed a few things with our hugepage selftests in his series "selftests/mm: Improve Hugepage Test Handling in MM Selftests". - Also, of course, many singleton patches to many things. Please see the individual changelogs for details. * tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (435 commits) mm/zswap: remove the memcpy if acomp is not sleepable crypto: introduce: acomp_is_async to expose if comp drivers might sleep memtest: use {READ,WRITE}_ONCE in memory scanning mm: prohibit the last subpage from reusing the entire large folio mm: recover pud_leaf() definitions in nopmd case selftests/mm: skip the hugetlb-madvise tests on unmet hugepage requirements selftests/mm: skip uffd hugetlb tests with insufficient hugepages selftests/mm: dont fail testsuite due to a lack of hugepages mm/huge_memory: skip invalid debugfs new_order input for folio split mm/huge_memory: check new folio order when split a folio mm, vmscan: retry kswapd's priority loop with cache_trim_mode off on failure mm: add an explicit smp_wmb() to UFFDIO_CONTINUE mm: fix list corruption in put_pages_list mm: remove folio from deferred split list before uncharging it filemap: avoid unnecessary major faults in filemap_fault() mm,page_owner: drop unnecessary check mm,page_owner: check for null stack_record before bumping its refcount mm: swap: fix race between free_swap_and_cache() and swapoff() mm/treewide: align up pXd_leaf() retval across archs mm/treewide: drop pXd_large() ...
2024-03-12Merge tag 'hardening-v6.9-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull hardening updates from Kees Cook: "As is pretty normal for this tree, there are changes all over the place, especially for small fixes, selftest improvements, and improved macro usability. Some header changes ended up landing via this tree as they depended on the string header cleanups. Also, a notable set of changes is the work for the reintroduction of the UBSAN signed integer overflow sanitizer so that we can continue to make improvements on the compiler side to make this sanitizer a more viable future security hardening option. Summary: - string.h and related header cleanups (Tanzir Hasan, Andy Shevchenko) - VMCI memcpy() usage and struct_size() cleanups (Vasiliy Kovalev, Harshit Mogalapalli) - selftests/powerpc: Fix load_unaligned_zeropad build failure (Michael Ellerman) - hardened Kconfig fragment updates (Marco Elver, Lukas Bulwahn) - Handle tail call optimization better in LKDTM (Douglas Anderson) - Use long form types in overflow.h (Andy Shevchenko) - Add flags param to string_get_size() (Andy Shevchenko) - Add Coccinelle script for potential struct_size() use (Jacob Keller) - Fix objtool corner case under KCFI (Josh Poimboeuf) - Drop 13 year old backward compat CAP_SYS_ADMIN check (Jingzi Meng) - Add str_plural() helper (Michal Wajdeczko, Kees Cook) - Ignore relocations in .notes section - Add comments to explain how __is_constexpr() works - Fix m68k stack alignment expectations in stackinit Kunit test - Convert string selftests to KUnit - Add KUnit tests for fortified string functions - Improve reporting during fortified string warnings - Allow non-type arg to type_max() and type_min() - Allow strscpy() to be called with only 2 arguments - Add binary mode to leaking_addresses scanner - Various small cleanups to leaking_addresses scanner - Adding wrapping_*() arithmetic helper - Annotate initial signed integer wrap-around in refcount_t - Add explicit UBSAN section to MAINTAINERS - Fix UBSAN self-test warnings - Simplify UBSAN build via removal of CONFIG_UBSAN_SANITIZE_ALL - Reintroduce UBSAN's signed overflow sanitizer" * tag 'hardening-v6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (51 commits) selftests/powerpc: Fix load_unaligned_zeropad build failure string: Convert helpers selftest to KUnit string: Convert selftest to KUnit sh: Fix build with CONFIG_UBSAN=y compiler.h: Explain how __is_constexpr() works overflow: Allow non-type arg to type_max() and type_min() VMCI: Fix possible memcpy() run-time warning in vmci_datagram_invoke_guest_handler() lib/string_helpers: Add flags param to string_get_size() x86, relocs: Ignore relocations in .notes section objtool: Fix UNWIND_HINT_{SAVE,RESTORE} across basic blocks overflow: Use POD in check_shl_overflow() lib: stackinit: Adjust target string to 8 bytes for m68k sparc: vdso: Disable UBSAN instrumentation kernel.h: Move lib/cmdline.c prototypes to string.h leaking_addresses: Provide mechanism to scan binary files leaking_addresses: Ignore input device status lines leaking_addresses: Use File::Temp for /tmp files MAINTAINERS: Update LEAKING_ADDRESSES details fortify: Improve buffer overflow reporting fortify: Add KUnit tests for runtime overflows ...
2024-03-06arch: consolidate existing CONFIG_PAGE_SIZE_*KB definitionsArnd Bergmann
These four architectures define the same Kconfig symbols for configuring the page size. Move the logic into a common place where it can be shared with all other architectures. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-03-01sh: Fix build with CONFIG_UBSAN=yKees Cook
The early boot stub for sh had UBSan instrumentation present where it is not supported. Disable it for this part of the build. sh4-linux-ld: arch/sh/boot/compressed/misc.o: in function `zlib_inflate_table': misc.c:(.text+0x670): undefined reference to `__ubsan_handle_shift_out_of_bounds' Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202401310416.s8HLiLnC-lkp@intel.com/ Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Nicolas Schier <n.schier@avm.de> Cc: <linux-sh@vger.kernel.org> Link: https://lore.kernel.org/r/20240130232717.work.088-kees@kernel.org Signed-off-by: Kees Cook <keescook@chromium.org>
2024-02-23arch, crash: move arch_crash_save_vmcoreinfo() out to file vmcore_info.cBaoquan He
Nathan reported below building error: ===== $ curl -LSso .config https://git.alpinelinux.org/aports/plain/community/linux-edge/config-edge.armv7 $ make -skj"$(nproc)" ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- olddefconfig all .. arm-linux-gnueabi-ld: arch/arm/kernel/machine_kexec.o: in function `arch_crash_save_vmcoreinfo': machine_kexec.c:(.text+0x488): undefined reference to `vmcoreinfo_append_str' ==== On architecutres, like arm, s390, ppc, sh, function arch_crash_save_vmcoreinfo() is located in machine_kexec.c and it can only be compiled in when CONFIG_KEXEC_CORE=y. That's not right because arch_crash_save_vmcoreinfo() is used to export arch specific vmcoreinfo. CONFIG_VMCORE_INFO is supposed to control its compiling in. However, CONFIG_VMVCORE_INFO could be independent of CONFIG_KEXEC_CORE, e.g CONFIG_PROC_KCORE=y will select CONFIG_VMVCORE_INFO. Or CONFIG_KEXEC/CONFIG_KEXEC_FILE is set while CONFIG_CRASH_DUMP is not set, it will report linking error. So, on arm, s390, ppc and sh, move arch_crash_save_vmcoreinfo out to a new file vmcore_info.c. Let CONFIG_VMCORE_INFO decide if compiling in arch_crash_save_vmcoreinfo(). [akpm@linux-foundation.org: remove stray newlines at eof] Link: https://lkml.kernel.org/r/20240129135033.157195-3-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Reported-by: Nathan Chancellor <nathan@kernel.org> Closes: https://lore.kernel.org/all/20240126045551.GA126645@dev-arch.thelio-3990X/T/#u Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Hari Bathini <hbathini@linux.ibm.com> Cc: Klara Modin <klarasmodin@gmail.com> Cc: Michael Kelley <mhklinux@outlook.com> Cc: Pingfan Liu <piliu@redhat.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Yang Li <yang.lee@linux.alibaba.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-23sh, crash: wrap crash dumping code into crash related ifdefsBaoquan He
Now crash codes under kernel/ folder has been split out from kexec code, crash dumping can be separated from kexec reboot in config items on SuperH with some adjustments. Wrap up crash dumping codes with CONFIG_CRASH_DUMP ifdeffery, and use IS_ENABLED(CONFIG_CRASH_RESERVE) check to decide if compiling in the crashkernel reservation code. Link: https://lkml.kernel.org/r/20240124051254.67105-11-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Hari Bathini <hbathini@linux.ibm.com> Cc: Pingfan Liu <piliu@redhat.com> Cc: Klara Modin <klarasmodin@gmail.com> Cc: Michael Kelley <mhklinux@outlook.com> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Yang Li <yang.lee@linux.alibaba.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-22Introduce cpu_dcache_is_aliasing() across all architecturesMathieu Desnoyers
Introduce a generic way to query whether the data cache is virtually aliased on all architectures. Its purpose is to ensure that subsystems which are incompatible with virtually aliased data caches (e.g. FS_DAX) can reliably query this. For data cache aliasing, there are three scenarios dependending on the architecture. Here is a breakdown based on my understanding: A) The data cache is always aliasing: * arc * csky * m68k (note: shared memory mappings are incoherent ? SHMLBA is missing there.) * sh * parisc B) The data cache aliasing is statically known or depends on querying CPU state at runtime: * arm (cache_is_vivt() || cache_is_vipt_aliasing()) * mips (cpu_has_dc_aliases) * nios2 (NIOS2_DCACHE_SIZE > PAGE_SIZE) * sparc32 (vac_cache_size > PAGE_SIZE) * sparc64 (L1DCACHE_SIZE > PAGE_SIZE) * xtensa (DCACHE_WAY_SIZE > PAGE_SIZE) C) The data cache is never aliasing: * alpha * arm64 (aarch64) * hexagon * loongarch (but with incoherent write buffers, which are disabled since commit d23b7795 ("LoongArch: Change SHMLBA from SZ_64K to PAGE_SIZE")) * microblaze * openrisc * powerpc * riscv * s390 * um * x86 Require architectures in A) and B) to select ARCH_HAS_CPU_CACHE_ALIASING and implement "cpu_dcache_is_aliasing()". Architectures in C) don't select ARCH_HAS_CPU_CACHE_ALIASING, and thus cpu_dcache_is_aliasing() simply evaluates to "false". Note that this leaves "cpu_icache_is_aliasing()" to be implemented as future work. This would be useful to gate features like XIP on architectures which have aliasing CPU dcache-icache but not CPU dcache-dcache. Use "cpu_dcache" and "cpu_cache" rather than just "dcache" and "cache" to clarify that we really mean "CPU data cache" and "CPU cache" to eliminate any possible confusion with VFS "dentry cache" and "page cache". Link: https://lore.kernel.org/lkml/20030910210416.GA24258@mail.jlokier.co.uk/ Link: https://lkml.kernel.org/r/20240215144633.96437-9-mathieu.desnoyers@efficios.com Fixes: d92576f1167c ("dax: does not work correctly with virtual aliasing caches") Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Russell King <linux@armlinux.org.uk> Cc: Alasdair Kergon <agk@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Chinner <david@fromorbit.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: kernel test robot <lkp@intel.com> Cc: Michael Sclafani <dm-devel@lists.linux.dev> Cc: Mike Snitzer <snitzer@kernel.org> Cc: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-15sh: dma-sysfs: Make dma_subsys constRicardo B. Marliere
Now that the driver core can properly handle constant struct bus_type, move the dma_subsys variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20240204-bus_cleanup-sh-v1-1-44ced951bb16@marliere.net Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
2024-02-01kernel.h: removed REPEAT_BYTE from kernel.hTanzir Hasan
This patch creates wordpart.h and includes it in asm/word-at-a-time.h for all architectures. WORD_AT_A_TIME_CONSTANTS depends on kernel.h because of REPEAT_BYTE. Moving this to another header and including it where necessary allows us to not include the bloated kernel.h. Making this implicit dependency on REPEAT_BYTE explicit allows for later improvements in the lib/string.c inclusion list. Suggested-by: Al Viro <viro@zeniv.linux.org.uk> Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Tanzir Hasan <tanzirh@google.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20231226-libstringheader-v6-1-80aa08c7652c@google.com Signed-off-by: Kees Cook <keescook@chromium.org>
2024-01-20Merge tag 'sh-for-v6.8-tag1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux Pull sh updates from John Paul Adrian Glaubitz: "Since the large patch series to convert arch/sh to device tree support has not been finalized yet due to various maintainers still asking for changes to the series, this ended up being rather small consisting of just two fixes. The first patch by Geert Uytterhoeven addresses a build failure in the EcoVec platform code. And the second patch by Masahiro Yamada removes an unnecessary $(foreach ...) found in a Makefile of the vsyscall code. - Rename missed backlight field from fbdev to dev - Remove unnecessary $(foreach ...)" * tag 'sh-for-v6.8-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux: sh: vsyscall: Remove unnecessary $(foreach ...) sh: ecovec24: Rename missed backlight field from fbdev to dev
2024-01-19Merge tag 'vfs-6.8.netfs' of ↵Linus Torvalds
gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs Pull netfs updates from Christian Brauner: "This extends the netfs helper library that network filesystems can use to replace their own implementations. Both afs and 9p are ported. cifs is ready as well but the patches are way bigger and will be routed separately once this is merged. That will remove lots of code as well. The overal goal is to get high-level I/O and knowledge of the page cache and ouf of the filesystem drivers. This includes knowledge about the existence of pages and folios The pull request converts afs and 9p. This removes about 800 lines of code from afs and 300 from 9p. For 9p it is now possible to do writes in larger than a page chunks. Additionally, multipage folio support can be turned on for 9p. Separate patches exist for cifs removing another 2000+ lines. I've included detailed information in the individual pulls I took. Summary: - Add NFS-style (and Ceph-style) locking around DIO vs buffered I/O calls to prevent these from happening at the same time. - Support for direct and unbuffered I/O. - Support for write-through caching in the page cache. - O_*SYNC and RWF_*SYNC writes use write-through rather than writing to the page cache and then flushing afterwards. - Support for write-streaming. - Support for write grouping. - Skip reads for which the server could only return zeros or EOF. - The fscache module is now part of the netfs library and the corresponding maintainer entry is updated. - Some helpers from the fscache subsystem are renamed to mark them as belonging to the netfs library. - Follow-up fixes for the netfs library. - Follow-up fixes for the 9p conversion" * tag 'vfs-6.8.netfs' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs: (50 commits) netfs: Fix wrong #ifdef hiding wait cachefiles: Fix signed/unsigned mixup netfs: Fix the loop that unmarks folios after writing to the cache netfs: Fix interaction between write-streaming and cachefiles culling netfs: Count DIO writes netfs: Mark netfs_unbuffered_write_iter_locked() static netfs: Fix proc/fs/fscache symlink to point to "netfs" not "../netfs" netfs: Rearrange netfs_io_subrequest to put request pointer first 9p: Use length of data written to the server in preference to error 9p: Do a couple of cleanups 9p: Fix initialisation of netfs_inode for 9p cachefiles: Fix __cachefiles_prepare_write() 9p: Use netfslib read/write_iter afs: Use the netfs write helpers netfs: Export the netfs_sreq tracepoint netfs: Optimise away reads above the point at which there can be no data netfs: Implement a write-through caching option netfs: Provide a launder_folio implementation netfs: Provide a writepages implementation netfs, cachefiles: Pass upper bound length to allow expansion ...
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