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2021-04-12fuse: unsigned open flagsMiklos Szeredi
Release helpers used signed int. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2021-04-12fuse: move ioctl to separate source fileMiklos Szeredi
Next patch will expand ioctl code and fuse/file.c is large enough as it is. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2021-04-12vfs: remove unused ioctl helpersMiklos Szeredi
Remove vfs_ioc_setflags_prepare(), vfs_ioc_fssetxattr_check() and simple_fill_fsxattr(), which are no longer used. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org>
2021-04-12ubifs: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Richard Weinberger <richard@nod.at>
2021-04-12reiserfs: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Jan Kara <jack@suse.cz>
2021-04-12ocfs2: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Joel Becker <jlbec@evilplan.org>
2021-04-12nilfs2: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Ryusuke Konishi <konishi.ryusuke@gmail.com>
2021-04-12jfs: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Dave Kleikamp <shaggy@kernel.org>
2021-04-12hfsplus: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2021-04-12efivars: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org>
2021-04-12xfs: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Darrick J. Wong <djwong@kernel.org>
2021-04-12orangefs: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Mike Marshall <hubcap@omnibond.com>
2021-04-12gfs2: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Andreas Gruenbacher <agruenba@redhat.com>
2021-04-12f2fs: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Jaegeuk Kim <jaegeuk@kernel.org>
2021-04-12ext4: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: "Theodore Ts'o" <tytso@mit.edu>
2021-04-12ext2: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Jan Kara <jack@suse.cz>
2021-04-12btrfs: convert to fileattrMiklos Szeredi
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: David Sterba <dsterba@suse.com>
2021-04-12ovl: stack fileattr opsMiklos Szeredi
Add stacking for the fileattr operations. Add hack for calling security_file_ioctl() for now. Probably better to have a pair of specific hooks for these operations. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2021-04-12ecryptfs: stack fileattr opsMiklos Szeredi
Add stacking for the fileattr operations. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Tyler Hicks <code@tyhicks.com>
2021-04-12vfs: add fileattr opsMiklos Szeredi
There's a substantial amount of boilerplate in filesystems handling FS_IOC_[GS]ETFLAGS/ FS_IOC_FS[GS]ETXATTR ioctls. Also due to userspace buffers being involved in the ioctl API this is difficult to stack, as shown by overlayfs issues related to these ioctls. Introduce a new internal API named "fileattr" (fsxattr can be confused with xattr, xflags is inappropriate, since this is more than just flags). There's significant overlap between flags and xflags and this API handles the conversions automatically, so filesystems may choose which one to use. In ->fileattr_get() a hint is provided to the filesystem whether flags or xattr are being requested by userspace, but in this series this hint is ignored by all filesystems, since generating all the attributes is cheap. If a filesystem doesn't implemement the fileattr API, just fall back to f_op->ioctl(). When all filesystems are converted, the fallback can be removed. 32bit compat ioctls are now handled by the generic code as well. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2021-04-12Merge branch 'opp/linux-next' of ↵Rafael J. Wysocki
git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm Pull OPP (Operating Performance Points) framework updates for v5.13 from Viresh Kumar: "This adds devm variants for OPP APIs and updates few of the users as well (Yangtao Li and Dmitry Osipenko)." * 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: memory: samsung: exynos5422-dmc: Convert to use resource-managed OPP API drm/panfrost: Convert to use resource-managed OPP API drm/lima: Convert to use resource-managed OPP API mmc: sdhci-msm: Convert to use resource-managed OPP API spi: spi-qcom-qspi: Convert to use resource-managed OPP API spi: spi-geni-qcom: Convert to use resource-managed OPP API serial: qcom_geni_serial: Convert to use resource-managed OPP API opp: Change return type of devm_pm_opp_attach_genpd() opp: Change return type of devm_pm_opp_register_set_opp_helper() opp: Add devres wrapper for dev_pm_opp_of_add_table opp: Add devres wrapper for dev_pm_opp_set_supported_hw opp: Add devres wrapper for dev_pm_opp_set_regulators opp: Add devres wrapper for dev_pm_opp_set_clkname
2021-04-12Merge branch 'cpufreq/arm/linux-next' of ↵Rafael J. Wysocki
git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm Pull ARM cpufreq updates for v5.13 from Viresh Kumar: "- Fix typos in s5pv210 cpufreq driver (Bhaskar Chowdhury). - Armada 37xx: Fix cpufreq changing base CPU speed to 800 MHz from 1000 MHz (Pali Rohár and Marek Behún). - cpufreq-dt: Return -EPROBE_DEFER on failure to add table (Quanyang Wang). - Minor cleanup in cppc driver (Tom Saeger). - Add frequency invariance support for CPPC driver and generalize freq invariance support arch-topology driver (Viresh Kumar)." * 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: cpufreq: armada-37xx: Fix module unloading cpufreq: armada-37xx: Remove cur_frequency variable cpufreq: armada-37xx: Fix determining base CPU frequency cpufreq: armada-37xx: Fix driver cleanup when registration failed clk: mvebu: armada-37xx-periph: Fix workaround for switching from L1 to L0 clk: mvebu: armada-37xx-periph: Fix switching CPU freq from 250 Mhz to 1 GHz cpufreq: armada-37xx: Fix the AVS value for load L1 clk: mvebu: armada-37xx-periph: remove .set_parent method for CPU PM clock cpufreq: armada-37xx: Fix setting TBG parent for load levels cpufreq: dt: dev_pm_opp_of_cpumask_add_table() may return -EPROBE_DEFER cpufreq: cppc: simplify default delay_us setting cpufreq: Rudimentary typos fix in the file s5pv210-cpufreq.c cpufreq: CPPC: Add support for frequency invariance arch_topology: Export arch_freq_scale and helpers arch_topology: Allow multiple entities to provide sched_freq_tick() callback arch_topology: Rename freq_scale as arch_freq_scale
2021-04-12arm64: mte: Ensure TIF_MTE_ASYNC_FAULT is set atomicallyCatalin Marinas
The entry from EL0 code checks the TFSRE0_EL1 register for any asynchronous tag check faults in user space and sets the TIF_MTE_ASYNC_FAULT flag. This is not done atomically, potentially racing with another CPU calling set_tsk_thread_flag(). Replace the non-atomic ORR+STR with an STSET instruction. While STSET requires ARMv8.1 and an assembler that understands LSE atomics, the MTE feature is part of ARMv8.5 and already requires an updated assembler. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Fixes: 637ec831ea4f ("arm64: mte: Handle synchronous and asynchronous tag check faults") Cc: <stable@vger.kernel.org> # 5.10.x Reported-by: Will Deacon <will@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20210409173710.18582-1-catalin.marinas@arm.com Signed-off-by: Will Deacon <will@kernel.org>
2021-04-12Revert "usb: Link the ports to the connectors they are attached to"Greg Kroah-Hartman
This reverts commit 63cd78617350dae99cc5fbd8f643b83ee819fe33 as it causes a build error: depmod: ERROR: Cycle detected: usbcore -> typec -> usbcore depmod: ERROR: Found 2 modules in dependency cycles! Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Link: https://lore.kernel.org/r/20210412213655.3776e15e@canb.auug.org.au Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-04-12usb: cdnsp: Fixes issue with Configure Endpoint commandPawel Laszczak
Patch adds flag EP_UNCONFIGURED to detect whether endpoint was unconfigured. This flag is set in cdnsp_reset_device after Reset Device command. Among others this command disables all non control endpoints. Flag is used in cdnsp_gadget_ep_disable to protect controller against invoking Configure Endpoint command on disabled endpoint. Lack of this protection in some cases caused that Configure Endpoint command completed with Context State Error code completion. Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver") Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-04-12usb: cdnsp: remove redundant initialization of variable retColin Ian King
The variable ret is being initialized with a value that is never read and it is being updated later with a new value. The initialization is redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-04-12usb: cdns3: delete repeated clear operationsWang Qing
dma_alloc_coherent already zeroes out memory, so memset is not needed. Signed-off-by: Wang Qing <wangqing@vivo.com> Reviewed-by: Pawel Laszczak <pawell@cadence.com> Acked-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-04-12usb: cdns3: Optimize DMA request buffer allocationSanket Parmar
dma_alloc_coherent() might fail on the platform with a small DMA region. To avoid such failure in cdns3_prepare_aligned_request_buf(), dma_alloc_coherent() is replaced with dma_alloc_noncoherent() to allocate aligned request buffer of dynamic length. Reported-by: Aswath Govindraju <a-govindraju@ti.com> Signed-off-by: Sanket Parmar <sparmar@cadence.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-04-12usb: cdns3: Use dma_pool_* api to alloc trb poolSanket Parmar
Allocation of DMA coherent memory in atomic context using dma_alloc_coherent() might fail on platforms with smaller DMA region. To fix it, dma_alloc_coherent() is replaced with dma_pool API to allocate a smaller chunk of DMA coherent memory for TRB rings. Reported-by: Aswath Govindraju <a-govindraju@ti.com> Signed-off-by: Sanket Parmar <sparmar@cadence.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-04-12usb: cdns3: fix static checker warning.Frank Li
The patch c450e48eb570: "usb: cdns3: add power lost support for system resume" from Feb 18, 2021, leads to the following static checker warning: drivers/usb/cdns3/core.c:551 cdns_resume() error: uninitialized symbol 'ret'. drivers/usb/cdns3/core.c 544 545 if (!role_changed) { 546 if (cdns->role == USB_ROLE_HOST) 547 ret = cdns_drd_host_on(cdns); 548 else if (cdns->role == USB_ROLE_DEVICE) 549 ret = cdns_drd_gadget_on(cdns); "ret" is uninitialized at else branch. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Frank Li <frank.li@nxp.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-04-12usb: cdns3: imx: mark cdns_imx_system_resume as __maybe_unusedWei Yongjun
The function cdns_imx_system_resume() may have no callers depending on configuration, so it must be marked __maybe_unused to avoid harmless warning: drivers/usb/cdns3/cdns3-imx.c:378:12: warning: 'cdns_imx_system_resume' defined but not used [-Wunused-function] 378 | static int cdns_imx_system_resume(struct device *dev) | ^~~~~~~~~~~~~~~~~~~~~~ Fixes: 67982dfa59de ("usb: cdns3: imx: add power lost support for system resume") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-04-12usb: cdns3: trace: delete the trace parameter for request->trbPeter Chen
It is not correct using %pa to print virtual address of request->trb, and it is hard to print its physical address due to the virtual address is zero before using. It could use index (start_trb/end_trb) to know the current trb position, so no matter virtual address or physical address for request-trb is not so meaningful. Reported-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-04-12usb: cdns3: imx: add power lost support for system resumeFrank Li
imx need special handle when controller lost power Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Frank Li <frank.li@nxp.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-04-12usb: cdns3: add power lost support for system resumeFrank Li
If the controller lost its power during the system suspend, we need to do all initialiation operations. Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Frank Li <frank.li@nxp.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-04-12drm/i915/display/vlv_dsi: Do not skip panel_pwr_cycle_delay when disabling ↵Hans de Goede
the panel After the recently added commit fe0f1e3bfdfe ("drm/i915: Shut down displays gracefully on reboot"), the DSI panel on a Cherry Trail based Predia Basic tablet would no longer properly light up after reboot. I've managed to reproduce this without rebooting by doing: chvt 3; echo 1 > /sys/class/graphics/fb0/blank;\ echo 0 > /sys/class/graphics/fb0/blank Which rapidly turns the panel off and back on again. The vlv_dsi.c code uses an intel_dsi_msleep() helper for the various delays used for panel on/off, since starting with MIPI-sequences version >= 3 the delays are already included inside the MIPI-sequences. The problems exposed by the "Shut down displays gracefully on reboot" change, show that using this helper for the panel_pwr_cycle_delay is not the right thing to do. This has not been noticed until now because normally the panel never is cycled off and directly on again in quick succession. Change the msleep for the panel_pwr_cycle_delay to a normal msleep() call to avoid the panel staying black after a quick off + on cycle. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Fixes: fe0f1e3bfdfe ("drm/i915: Shut down displays gracefully on reboot") Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210325114823.44922-1-hdegoede@redhat.com (cherry picked from commit 2878b29fc25a0dac0e1c6c94177f07c7f94240f0) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2021-04-12drm/i915: Don't zero out the Y plane's watermarksVille Syrjälä
Don't zero out the watermarks for the Y plane since we've already computed them when computing the UV plane's watermarks (since the UV plane always appears before ethe Y plane when iterating through the planes). This leads to allocating no DDB for the Y plane since .min_ddb_alloc also gets zeroed. And that of course leads to underruns when scanning out planar formats. Cc: stable@vger.kernel.org Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> Fixes: dbf71381d733 ("drm/i915: Nuke intel_atomic_crtc_state_for_each_plane_state() from skl+ wm code") Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210327005945.4929-1-ville.syrjala@linux.intel.com Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> (cherry picked from commit f99b805fb9413ff007ca0b6add871737664117dd) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2021-04-12drm/i915/dpcd_bl: Don't try vesa interface unless specified by VBTLyude Paul
Looks like that there actually are another subset of laptops on the market that don't support the Intel HDR backlight interface, but do advertise support for the VESA DPCD backlight interface despite the fact it doesn't seem to work. Note though I'm not entirely clear on this - on one of the machines where this issue was observed, I also noticed that we appeared to be rejecting the VBT defined backlight frequency in intel_dp_aux_vesa_calc_max_backlight(). It's noted in this function that: /* Use highest possible value of Pn for more granularity of brightness * adjustment while satifying the conditions below. * ... * - FxP is within 25% of desired value. * Note: 25% is arbitrary value and may need some tweak. */ So it's possible that this value might just need to be tweaked, but for now let's just disable the VESA backlight interface unless it's specified in the VBT just to be safe. We might be able to try enabling this again by default in the future. Fixes: 2227816e647a ("drm/i915/dp: Allow forcing specific interfaces through enable_dpcd_backlight") Cc: Jani Nikula <jani.nikula@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Bugzilla: https://gitlab.freedesktop.org/drm/intel/-/issues/3169 Signed-off-by: Lyude Paul <lyude@redhat.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210318170204.513000-1-lyude@redhat.com (cherry picked from commit 9e2eb6d5380e9dadcd2baecb51f238e5eba94bee) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2021-04-12x86/asm: Ensure asm/proto.h can be included stand-aloneJan Kiszka
Fix: ../arch/x86/include/asm/proto.h:14:30: warning: ‘struct task_struct’ declared \ inside parameter list will not be visible outside of this definition or declaration long do_arch_prctl_64(struct task_struct *task, int option, unsigned long arg2); ^~~~~~~~~~~ .../arch/x86/include/asm/proto.h:40:34: warning: ‘struct task_struct’ declared \ inside parameter list will not be visible outside of this definition or declaration long do_arch_prctl_common(struct task_struct *task, int option, ^~~~~~~~~~~ if linux/sched.h hasn't be included previously. This fixes a build error when this header is used outside of the kernel tree. [ bp: Massage commit message. ] Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/b76b4be3-cf66-f6b2-9a6c-3e7ef54f9845@web.de
2021-04-12arm64: fpsimd: run kernel mode NEON with softirqs disabledArd Biesheuvel
Kernel mode NEON can be used in task or softirq context, but only in a non-nesting manner, i.e., softirq context is only permitted if the interrupt was not taken at a point where the kernel was using the NEON in task context. This means all users of kernel mode NEON have to be aware of this limitation, and either need to provide scalar fallbacks that may be much slower (up to 20x for AES instructions) and potentially less safe, or use an asynchronous interface that defers processing to a later time when the NEON is guaranteed to be available. Given that grabbing and releasing the NEON is cheap, we can relax this restriction, by increasing the granularity of kernel mode NEON code, and always disabling softirq processing while the NEON is being used in task context. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20210302090118.30666-4-ardb@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2021-04-12arm64: assembler: introduce wxN aliases for wN registersArd Biesheuvel
The AArch64 asm syntax has this slightly tedious property that the names used in mnemonics to refer to registers depend on whether the opcode in question targets the entire 64-bits (xN), or only the least significant 8, 16 or 32 bits (wN). When writing parameterized code such as macros, this can be annoying, as macro arguments don't lend themselves to indexed lookups, and so generating a reference to wN in a macro that receives xN as an argument is problematic. For instance, an upcoming patch that modifies the implementation of the cond_yield macro to be able to refer to 32-bit registers would need to modify invocations such as cond_yield 3f, x8 to cond_yield 3f, 8 so that the second argument can be token pasted after x or w to emit the correct register reference. Unfortunately, this interferes with the self documenting nature of the first example, where the second argument is obviously a register, whereas in the second example, one would need to go and look at the code to find out what '8' means. So let's fix this by defining wxN aliases for all xN registers, which resolve to the 32-bit alias of each respective 64-bit register. This allows the macro implementation to paste the xN reference after a w to obtain the correct register name. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20210302090118.30666-3-ardb@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2021-04-12arm64: assembler: remove conditional NEON yield macrosArd Biesheuvel
The users of the conditional NEON yield macros have all been switched to the simplified cond_yield macro, and so the NEON specific ones can be removed. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20210302090118.30666-2-ardb@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2021-04-12s390/test_unwind: add WARN if tests failedVasily Gorbik
Trigger a warning if any of unwinder tests fail. This should help to prevent quiet ignoring of test results when panic_on_warn is enabled. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2021-04-12s390/test_unwind: unify error handling pathsVasily Gorbik
Handle the case of "unwind state reliable but addr is 0" like other error cases in this function and trigger output of failing stacktrace to aid debugging. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2021-04-12s390: update defconfigsHeiko Carstens
Set CONFIG_FRAME_WARN to 2048, which is the default for 64 bit architectures. Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2021-04-12s390/spinlock: use R constraint in inline assemblyHeiko Carstens
Allow the compiler to generate slightly better code by using the R constraint. Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2021-04-12s390/atomic,cmpxchg: switch to use atomic-instrumented.hHeiko Carstens
Add arch_ prefix to all atomic operations, and define ARCH_ATOMIC. This enables KASAN instrumentation for all atomic operations on s390. This is the s390 variant of commit 8bf705d13039 ("locking/atomic/x86: Switch atomic.h to use atomic-instrumented.h"). Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2021-04-12s390/cmpxchg: get rid of gcc atomic builtinsHeiko Carstens
s390 is the only architecture in the kernel which makes use of gcc's atomic builtin functions. Even though I don't see any technical problem with that right now, remove this code and open-code compare-and-swap loops again, like every other architecture is doing it also. We can switch to a generic implementation when other architectures are doing that also. See also https://lwn.net/Articles/586838/ for forther details. This basically reverts commit f318a1229bd8 ("s390/cmpxchg: use compiler builtins"). Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2021-04-12s390/atomic: get rid of gcc atomic builtinsHeiko Carstens
s390 is the only architecture in the kernel which makes use of gcc's atomic builtin functions. Even though I don't see any technical problem with that right now, remove this code and open-code compare-and-swap loops again, like every other architecture is doing it also. We can switch to a generic implementation when other architectures are doing that also. See also https://lwn.net/Articles/586838/ for forther details. Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2021-04-12s390/atomic: use proper constraintsHeiko Carstens
Use the R,T, and S constraints instead of the Q constraint in atomic inline assemblies wherever possible. This allows the compiler to generate better code. (~ -2kb code size). Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2021-04-12s390/atomic: move remaining inline assemblies to atomic_ops.hHeiko Carstens
Move all remaining inline assemblies from atomic.h to atomic_ops.h. That way all atomic inline assemblies are contained within only a single header file. Signed-off-by: Heiko Carstens <hca@linux.ibm.com>