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2017-01-25powerpc/bpf: Remove redundant check for non-null imageDaniel Borkmann
We have a check earlier to ensure we don't proceed if image is NULL. As such, the redundant check can be removed. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> [Added similar changes for classic BPF JIT] Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25powerpc/mm: Return directly after a failed __copy_from_user() in ↵Markus Elfring
sys_subpage_prot() This function already has multiple exit points, so there's no harm adding another. Although it looks odd to return directly in a function which takes a lock, we've actually just dropped the mmap_sem in this code, so there's really no reason to go via a label. And it means we can drop the unhelpfully named out2 label. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> [mpe: Rewrite change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25powerpc/sstep: Return directly after a failed address_ok() in emulate_step()Markus Elfring
Setting err and going to ldst_done just returns 0, without using err, so just return 0 directly. We already do that for other call sites in this function. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> [mpe: Rewrite change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25powerpc/kernel: Fix unbalanced refcount on RTAS device nodeGavin Shan
The RTAS device-tree node's refcount has been increased by one in the function call of_find_node_by_name(), but it's missed to be decreased by one in the error path. It leads to unbalanced refcount on RTAS device-tree node. This fixes above issue by decreasing RTAS device-tree node's refcount in error path. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25powerpc/kernel: Use of_property_read_u32() in rtas_initialize()Gavin Shan
This uses of_property_read_u32() in rtas_initialize() so that we needn't explicitly care the CPU's endian. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25powerpc/kernel: Remove nested if statements in rtas_initialize()Gavin Shan
This removes the unnecessary nested if statements in function rtas_initialize(), to simplify the code. No functional changes introduced. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25powerpc/powernv/pci: Use kmalloc_array() in two functionsMarkus Elfring
Use kmalloc_array(), which checks for overflow of the multiplication, rather than doing it by hand. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25powerpc/mm: Fixup wrong LPCR_VRMASD valueAneesh Kumar K.V
In commit a4b349540a26af ("powerpc/mm: Cleanup LPCR defines") we updated LPCR_VRMASD wrongly as below. -#define LPCR_VRMASD (0x1ful << (63-16)) +#define LPCR_VRMASD_SH 47 +#define LPCR_VRMASD (ASM_CONST(1) << LPCR_VRMASD_SH) We initialize the VRMA bits in LPCR to 0x00 in kvm. Hence using a different mask value as above while updating lpcr should not have any impact. This patch updates it to the correct value. Fixes: a4b349540a26 ("powerpc/mm: Cleanup LPCR defines") Reported-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Jia He <hejianet@gmail.com> Acked-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25powerpc/64: Use optimized checksum routines on little-endianPaul Mackerras
Currently we have optimized hand-coded assembly checksum routines for big-endian 64-bit systems, but for little-endian we use the generic C routines. This modifies the optimized routines to work for little-endian. With this, we no longer need to enable CONFIG_GENERIC_CSUM. This also fixes a couple of comments in checksum_64.S so they accurately reflect what the associated instruction does. Signed-off-by: Paul Mackerras <paulus@ozlabs.org> [mpe: Use the more common __BIG_ENDIAN__] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25powerpc/64: Fix checksum folding in csum_tcpudp_nofold and ip_fast_csum_nofoldPaul Mackerras
These functions compute an IP checksum by computing a 64-bit sum and folding it to 32 bits (the "nofold" in their names refers to folding down to 16 bits). However, doing (u32) (s + (s >> 32)) is not sufficient to fold a 64-bit sum to 32 bits correctly. The addition can produce a carry out from bit 31, which needs to be added in to the sum to produce the correct result. To fix this, we copy the from64to32() function from lib/checksum.c and use that. Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25powerpc/powernv: Report size of OPAL memcons logJoel Stanley
The OPAL memory console is reported to be size zero, as we do not initialise the struct attr with any size information due to the size being variable. This leads users to think that the console is empty. Instead report the maximum size. Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-25MIPS: Lantiq: Lock DMA register accesses for SMPHauke Mehrtens
The DMA controller channel and port configuration is changed by selecting the port or channel in one register and then update the configuration in other registers. This has to be done in an atomic operation. Previously only the local interrupts were deactivated which works for single CPU systems. If the system supports SMP a better locking is needed, use spinlocks instead. On more recent SoCs (at least xrx200 and later) there are two memory regions to change the configuration, there we could use one area for each CPU and do not have to synchronize between the CPUs and more. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Cc: john@phrozen.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14912/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25mips: ath79: clock:- Unmap region obtained by of_iomapArvind Yadav
Free memory mapping, if ath79_clocks_init_dt_ng is not successful. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Fixes: 3bdf1071ba7d ("MIPS: ath79: update devicetree clock support for AR9132") Cc: antonynpavlov@gmail.com Cc: albeu@free.fr Cc: hackpascal@gmail.com Cc: sboyd@codeaurora.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14915/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: Generic: Fix big endian CPUs on generic machineMatt Redfearn
Big endian CPUs require SWAP_IO_SPACE enabled to swap accesses to little endian peripherals. Without this patch, big endian kernels fail to communicate with little endian periperals, such as PCI devices, on QEMU and FPGA based platforms. Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Fixes: eed0eabd12ef ("MIPS: generic: Introduce generic DT-based board support") Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15105/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: BCM47XX: Add Luxul devices to the databaseDan Haab
So far only Luxul XWR-1750 router was supported. This adds a set of other Luxul devices based on BCM47XX. It's a standard support for LEDs and buttons. Signed-off-by: Dan Haab <dhaab@luxul.com> Cc: Hauke Mehrtens <hauke@hauke-m.de> Cc: Rafał Miłecki <zajec5@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15106/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: syscall: Return directly in mips_mmap()Markus Elfring
* Return an error code without storing it in an intermediate variable. * Delete the local variable "result" which became unnecessary with this refactoring. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: linux-mips@linux-mips.org Cc: LKML <linux-kernel@vger.kernel.org> Cc: kernel-janitors@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15073/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: MT: Move an assignment for the variable "retval" in ↵Markus Elfring
mipsmt_sys_sched_setaffinity() A local variable was set to an error code in one case before a concrete error situation was detected. Thus move the corresponding assignment into an if branch to indicate a software failure there. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: linux-mips@linux-mips.org Cc: LKML <linux-kernel@vger.kernel.org> Cc: kernel-janitors@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15072/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: Return directly in 32_mmap2()Markus Elfring
* Return a failure indication without storing it in an intermediate variable. * Delete the local variable "error" which became unnecessary with this refactoring. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: linux-mips@linux-mips.org Cc: LKML <linux-kernel@vger.kernel.org> Cc: kernel-janitors@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15071/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: Avoid old-style declarationArnd Bergmann
gcc warns about nonstandard declarations: arch/mips/sgi-ip32/ip32-irq.c:31:1: error: 'inline' is not at beginning of declaration [-Werror=old-style-declaration] arch/mips/sgi-ip32/ip32-irq.c:36:1: error: 'inline' is not at beginning of declaration [-Werror=old-style-declaration] arch/mips/sgi-ip27/ip27-klnuma.c: In function 'replicate_kernel_text': arch/mips/sgi-ip27/ip27-klnuma.c:85:116: error: old-style function definition [-Werror=old-style-definition] Moving 'inline' before the return type, and adding argument types shuts up the warning here. This patch affects several platforms, but all in a trivial way. I'm fixing up all instances I found in any of the 'defconfig' builds. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15050/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: ip22: Fix ip28 build for modern gccArnd Bergmann
kernelci reports a failure of the ip28_defconfig build after upgrading its gcc version: arch/mips/sgi-ip22/Platform:29: *** gcc doesn't support needed option -mr10k-cache-barrier=store. Stop. The problem apparently is that the -mr10k-cache-barrier=store option is now rejected for CPUs other than r10k. Explicitly including the CPU in the check fixes this and is safe because both options were introduced in gcc-4.4. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15049/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: Octeon: Avoid empty-body warningArnd Bergmann
gcc-6 reports a harmless build warning: arch/mips/cavium-octeon/dma-octeon.c: In function 'octeon_dma_alloc_coherent': arch/mips/cavium-octeon/dma-octeon.c:179:3: error: suggest braces around empty body in an 'else' statement [-Werror=empty-body] We can fix this by rearranging the code slightly using the IS_ENABLED() macro. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15048 Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: Loongson64: Fix empty-body warning in dma_allocArnd Bergmann
A new gcc warning shows up for this old code with gcc-6: arch/mips/loongson64/common/dma-swiotlb.c: In function 'loongson_dma_alloc_coherent': arch/mips/loongson64/common/dma-swiotlb.c:35:2: error: suggest braces around empty body in an 'else' statement [-Werror=empty-body] The code can be easily restructured to look more readable and avoid the warning at the same time. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Robin Murphy <robin.murphy@arm.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15047/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: ralink: Remove unused rt*_wdt_reset functionsArnd Bergmann
All pointers to these functions were removed, so now they produce warnings: arch/mips/ralink/rt305x.c:92:13: error: 'rt305x_wdt_reset' defined but not used [-Werror=unused-function] This removes the functions. If we need them again, the patch can be reverted later. Fixes: f576fb6a0700 ("MIPS: ralink: cleanup the soc specific pinmux data") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: John Crispin <john@phrozen.org> Cc: Colin Ian King <colin.king@canonical.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15044/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: ralink: Fix request_mem_region error handlingArnd Bergmann
request_mem_region returns a NULL pointer on error, comparing it against a number results in a warning: arch/mips/ralink/of.c: In function 'plat_of_remap_node': arch/mips/ralink/of.c:45:15: error: ordered comparison of pointer with integer zero [-Werror=extra] arch/mips/ralink/irq.c: In function 'intc_of_init': arch/mips/ralink/irq.c:167:15: error: ordered comparison of pointer with integer zero [-Werror=extra] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: John Crispin <john@phrozen.org> Cc: Tobias Wolf <dev-NTEO@vplace.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15045/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: ralink: Remove unused timer functionsArnd Bergmann
The functions were originally used for the module unload path, but are not referenced any more and just cause warnings: arch/mips/ralink/timer.c:104:13: error: 'rt_timer_disable' defined but not used [-Werror=unused-function] arch/mips/ralink/timer.c:74:13: error: 'rt_timer_free' defined but not used [-Werror=unused-function] Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Fixes: 62ee73d284e7 ("MIPS: ralink: Make timer explicitly non-modular") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: John Crispin <john@phrozen.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15041/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: Lantiq: Fix another request_mem_region() return code checkArnd Bergmann
Hauke already fixed a couple of them, but one instance remains that checks for a negative integer when it should check for a NULL pointer: arch/mips/lantiq/xway/sysctrl.c: In function 'ltq_soc_init': arch/mips/lantiq/xway/sysctrl.c:473:19: error: ordered comparison of pointer with integer zero [-Werror=extra] Fixes: 6e807852676a ("MIPS: Lantiq: Fix check for return value of request_mem_region()") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: John Crispin <john@phrozen.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15043/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: Alchemy: Remove duplicate initializerArnd Bergmann
We get a harmless warning about a duplicate initalizer for the i2c board info structure: arch/mips/alchemy/board-gpr.c:239:11: error: initialized field overwritten [-Werror=override-init] As both initializers have the identical value, we can simply drop the second one. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15046/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: 'make -s' should be silentArnd Bergmann
A clean mips64 build produces no output except for two lines: Checking missing-syscalls for N32 Checking missing-syscalls for O32 On other architectures, there is no output at all, so let's do the same here for the sake of build testing. The 'kecho' macro is used to print the message on a normal build but skip it with 'make -s'. Fixes: e48ce6b8df5b ("[MIPS] Simplify missing-syscalls for N32 and O32") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Huacai Chen <chenhc@lemote.com> Cc: Maarten ter Huurne <maarten@treewalker.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15040/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-25MIPS: VDSO: avoid duplicate CAC_BASE definitionArnd Bergmann
vdso.h includes <spaces.h> implicitly after defining CONFIG_32BITS. This defeats the override in mach-ip27/spaces.h, leading to a build error that shows up in kernelci.org: In file included from arch/mips/include/asm/mach-ip27/spaces.h:29:0, from arch/mips/include/asm/page.h:12, from arch/mips/vdso/vdso.h:26, from arch/mips/vdso/gettimeofday.c:11: arch/mips/include/asm/mach-generic/spaces.h:28:0: error: "CAC_BASE" redefined [-Werror] #define CAC_BASE _AC(0x80000000, UL) An earlier patch tried to make the second definition conditional, but that patch had the #ifdef in the wrong place, and would lead to another warning: arch/mips/include/asm/io.h: In function 'phys_to_virt': arch/mips/include/asm/io.h:138:9: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] For all I can tell, there is no other reason than vdso32 to ever include this file with CONFIG_32BITS set, and the vdso itself should never refer to the base addresses as it is running in user space, so adding an #ifdef here is safe. Link: https://patchwork.kernel.org/patch/9418187/ Fixes: 3ffc17d8768b ("MIPS: Adjust MIPS64 CAC_BASE to reflect Config.K0") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15039/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-24mn10300: fix build error of missing fpu_save()Randy Dunlap
When CONFIG_FPU is not enabled on arch/mn10300, <asm/switch_to.h> causes a build error with a call to fpu_save(): kernel/built-in.o: In function `.L410': core.c:(.sched.text+0x28a): undefined reference to `fpu_save' Fix this by including <asm/fpu.h> in <asm/switch_to.h> so that an empty static inline fpu_save() is defined. Link: http://lkml.kernel.org/r/dc421c4f-4842-4429-1b99-92865c2f24b6@infradead.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kbuild test robot <fengguang.wu@intel.com> Reviewed-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-01-24frv: add missing atomic64 operationsSudip Mukherjee
Some more atomic64 operations were missing and as a result frv allmodconfig was failing. Add the missing operations. Link: http://lkml.kernel.org/r/1485193844-12850-1-git-send-email-sudip.mukherjee@codethink.co.uk Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-01-24frv: add atomic64_add_unless()Sudip Mukherjee
The build of frv allmodconfig was failing with the error: lib/atomic64_test.c:209:9: error: implicit declaration of function 'atomic64_add_unless' All the atomic64 operations were defined in frv, but atomic64_add_unless() was not done. Implement atomic64_add_unless() as done in other arches. Link: http://lkml.kernel.org/r/1484781236-6698-1-git-send-email-sudipm.mukherjee@gmail.com Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-01-24ARCv2: smp-boot: wake_flag polling by non-Masters needs to be uncachedVineet Gupta
This is needed on HS38 cores, for setting up IO-Coherency aperture properly The polling could perturb the caches and coherecy fabric which could be wrong in the small window when Master is setting up IOC aperture etc in arc_cache_init() We do it only for ARCv2 based builds to not affect EZChip ARCompact based platform. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2017-01-24ARC: smp-boot: Decouple Non masters waiting API from jump to entry pointVineet Gupta
For run-on-reset SMP configs, non master cores call a routine which waits until Master gives it a "go" signal (currently using a shared mem flag). The same routine then jumps off the well known entry point of all non Master cores i.e. @first_lines_of_secondary This patch moves out the last part into one single place in early boot code. This is better in terms of absraction (the wait API only waits) and returns, leaving out the "jump off to" part. In actual implementation this requires some restructuring of the early boot code as well as Master now jumps to BSS setup explicitly, vs. falling thru into it before. Technically this patch doesn't cause any functional change, it just moves the ugly #ifdef'ry from assembly code to "C" Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2017-01-24ARCv2: MCIP: update the BCR per current changesVineet Gupta
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2017-01-24ARC: udelay: fix inline assembler by adding LP_COUNT to clobber listVineet Gupta
commit 3c7c7a2fc8811bc ("ARC: Don't use "+l" inline asm constraint") modified the inline assembly to setup LP_COUNT register manually and NOT rely on gcc to do it (with the +l inline assembler contraint hint, now being retired in the compiler) However the fix was flawed as we didn't add LP_COUNT to asm clobber list, meaning gcc doesn't know that LP_COUNT or zero-delay-loops are in action in the inline asm. This resulted in some fun - as nested ZOL loops were being generared | mov lp_count,250000 ;16 # tmp235, | lp .L__GCC__LP14 # <======= OUTER LOOP (gcc generated) | .L14: | ld r2, [r5] # MEM[(volatile u32 *)prephitmp_43], w | dmb 1 | breq r2, -1, @.L21 #, w,, | bbit0 r2,1,@.L13 # w,, | ld r4,[r7] ;25 # loops_per_jiffy, loops_per_jiffy | mpymu r3,r4,r6 #, loops_per_jiffy, tmp234 | | mov lp_count, r3 # <====== INNER LOOP (from inline asm) | lp 1f | nop | 1: | nop_s | .L__GCC__LP14: ; loop end, start is @.L14 #, This caused issues with drivers relying on sane behaviour of udelay friends. With LP_COUNT added to clobber list, gcc doesn't generate the outer loop in say above case. Addresses STAR 9001146134 Reported-by: Joao Pinto <jpinto@synopsys.com> Fixes: 3c7c7a2fc8811bc ("ARC: Don't use "+l" inline asm constraint") Cc: stable@vger.kernel.org Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2017-01-24ARCv2: MCIP: Deprecate setting of affinity in Device TreeYuriy Kolerov
Ignore value of interrupt distribution mode for common interrupts in IDU since setting of affinity using value from Device Tree is deprecated in ARC. Originally it is done in idu_irq_xlate() function and it is semantically wrong and does not guaranty that an affinity value will be set properly. idu_irq_enable() function is better place for initialization of common interrupts. By default send all common interrupts to all available online CPUs. The affinity of common interrupts in IDU must be set manually since in some cases the kernel will not call irq_set_affinity() by itself: 1. When the kernel is not configured with support of SMP. 2. When the kernel is configured with support of SMP but upper interrupt controllers does not support setting of the affinity and cannot propagate it to IDU. Signed-off-by: Yuriy Kolerov <yuriy.kolerov@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2017-01-24arm64: dts: exynos: set LDO7 regulator as always onAndrzej Hajda
LDO7 regulator beside DSI and HDMI provides power for core blocks in Exynos 5433 SoC. Disabling it causes serious current leak - about 200mA. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
2017-01-24frv: migrate exception table users off module.h and onto extable.hPaul Gortmaker
This file was only including module.h for exception table related functions. We've now separated that content out into its own file "extable.h" so now move over to that and avoid all the extra header content in module.h that we don't really need to compile this file. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2017-01-24sh: migrate exception table users off module.h and onto extable.hPaul Gortmaker
These files were only including module.h for exception table related functions. We've now separated that content out into its own file "extable.h" so now move over to that and avoid all the extra header content in module.h that we don't really need to compile these files. One uses "print_modules" so that prevents us removing module.h in that case, however. We also delete a duplicate prototype that doesn't need to exist, as it duplicates content in extable.h Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: linux-sh@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2017-01-24xtensa: migrate exception table users off module.h and onto extable.hPaul Gortmaker
This file was only including module.h for exception table related functions. We've now separated that content out into its own file "extable.h" so now move over to that and avoid all the extra header content in module.h that we don't really need to compile this file. Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: linux-xtensa@linux-xtensa.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2017-01-24mn10300: migrate exception table users off module.h and onto extable.hPaul Gortmaker
These files were only including module.h for exception table related functions. We've now separated that content out into its own file "extable.h" so now move over to that and avoid all the extra header content in module.h that we don't really need to compile these files. Cc: David Howells <dhowells@redhat.com> Cc: linux-am33-list@redhat.com Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2017-01-24alpha: migrate exception table users off module.h and onto extable.hPaul Gortmaker
These files were only including module.h for exception table related functions. We've now separated that content out into its own file "extable.h" so now move over to that and avoid all the extra header content in module.h that we don't really need to compile these files. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: linux-alpha@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2017-01-24arm: migrate exception table users off module.h and onto extable.hPaul Gortmaker
These files were only including module.h for exception table related functions. We've now separated that content out into its own file "extable.h" so now move over to that and avoid all the extra header content in module.h that we don't really need to compile these files. Cc: Russell King <linux@armlinux.org.uk> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2017-01-24m32r: migrate exception table users off module.h and onto extable.hPaul Gortmaker
These files were only including module.h for exception table related functions. We've now separated that content out into its own file "extable.h" so now move over to that and avoid all the extra header content in module.h that we don't really need to compile these files. Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Acked-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2017-01-24ia64: ensure exception table search users include extable.hPaul Gortmaker
We start with a delete of a duplicate prototype in asm/exception.h that no longer needs to exist, as it duplicates content in extable.h and since that header is so small, there is no point trying to avoid using it. Then we make sure anyone using search_exception_tables directly or via the ia64_done_with_exception macro has included extable.h In the process, we remove an include of moduleloader.h that was apparently not really required; it would have been fetching in module.h and hence the previous location of the exception search function prototypes, but we need not rely on that anymore. Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2017-01-24ia64: move ia64_done_with_exception out of asm/uaccess.hPaul Gortmaker
Move ia64_done_with_exception out of asm/uaccess.h (which is widely used) and into asm/exception.h (like ARM has) and then ensure the few callers of it include this new header. Most of the other C content in asm files is implemented in macro form. So we do that conversion at the same time as the move. There are two C exception prototypes that move along with the macro. One of them will become redundant when we switch over to using the <linux/extable.h> instead of <linux/module.h> header in a subsequent commit. Also relocate a couple of the automated asm --> linux uaccess conversions to preserve the linux and asm independent grouping, since we are in the file at that location anyway. Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2017-01-24MIPS: Fix modversionsArnd Bergmann
kernelci.org reports tons of build warnings for linux-next: 35 WARNING: "memcpy" [fs/fat/msdos.ko] has no CRC! 35 WARNING: "__copy_user" [fs/fat/fat.ko] has no CRC! 32 WARNING: EXPORT symbol "memset" [vmlinux] version generation failed, symbol will not be versioned. 32 WARNING: EXPORT symbol "copy_page" [vmlinux] version generation failed, symbol will not be versioned. 32 WARNING: EXPORT symbol "clear_page" [vmlinux] version generation failed, symbol will not be versioned. 32 WARNING: EXPORT symbol "__strncpy_from_user_nocheck_asm" [vmlinux] version generation failed, symbol will not be versioned. The problem here is mainly the missing asm/asm-prototypes.h header file that is supposed to include the prototypes for each symbol that is exported from an assembler file. A second problem is that the asm/uaccess.h header contains some but not all the necessary declarations for the user access helpers. Finally, the vdso build is broken once we add asm/asm-prototypes.h, so we have to fix this at the same time by changing the vdso header. My approach here is to just not look for exported symbols in the VDSO assembler files, as the symbols cannot be exported anyway. Fixes: 576a2f0c5c6d ("MIPS: Export memcpy & memset functions alongside their definitions") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: James Hogan <james.hogan@imgtec.com> Cc: Maciej W. Rozycki <macro@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15038/ Patchwork: https://patchwork.linux-mips.org/patch/15069/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-24MIPS: Update ip27_defconfig for SCSI_DH changeArnd Bergmann
Since linux-4.3, SCSI_DH is a bool symbol, causing a warning in kernelci.org: arch/mips/configs/ip27_defconfig:136:warning: symbol value 'm' invalid for SCSI_DH This updates the defconfig to have the feature built-in. Fixes: 086b91d052eb ("scsi_dh: integrate into the core SCSI code") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15001/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-24MIPS: Update lemote2f_defconfig for CPU_FREQ_STAT changeArnd Bergmann
Since linux-4.8, CPU_FREQ_STAT is a bool symbol, causing a warning in kernelci.org: arch/mips/configs/lemote2f_defconfig:42:warning: symbol value 'm' invalid for CPU_FREQ_STAT This updates the defconfig to have the feature built-in. Fixes: 1aefc75b2449 ("cpufreq: stats: Make the stats code non-modular") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15000/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>