- 26 Apr, 2017 2 commits
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Josh Poimboeuf authored
Currently unwind_dump() dumps only the most recently accessed stack. But it has a few issues. In some cases, 'first_sp' can get out of sync with 'stack_info', causing unwind_dump() to start from the wrong address, flood the printk buffer, and eventually read a bad address. In other cases, dumping only the most recently accessed stack doesn't give enough data to diagnose the error. Fix both issues by dumping *all* stacks involved in the trace, not just the last one. Signed-off-by:
Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 8b5e99f0 ("x86/unwind: Dump stack data on warnings") Link: http://lkml.kernel.org/r/016d6a9810d7d1bfc87ef8c0e6ee041c6744c909.1493171120.git.jpoimboe@redhat.comSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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Josh Poimboeuf authored
Borislav Petkov reported the following unwinder warning: WARNING: kernel stack regs at ffffc9000024fea8 in udevadm:92 has bad 'bp' value 00007fffc4614d30 unwind stack type:0 next_sp: (null) mask:0x6 graph_idx:0 ffffc9000024fea8: 000055a6100e9b38 (0x55a6100e9b38) ffffc9000024feb0: 000055a6100e9b35 (0x55a6100e9b35) ffffc9000024feb8: 000055a6100e9f68 (0x55a6100e9f68) ffffc9000024fec0: 000055a6100e9f50 (0x55a6100e9f50) ffffc9000024fec8: 00007fffc4614d30 (0x7fffc4614d30) ffffc9000024fed0: 000055a6100eaf50 (0x55a6100eaf50) ffffc9000024fed8: 0000000000000000 ... ffffc9000024fee0: 0000000000000100 (0x100) ffffc9000024fee8: ffff8801187df488 (0xffff8801187df488) ffffc9000024fef0: 00007ffffffff000 (0x7ffffffff000) ffffc9000024fef8: 0000000000000000 ... ffffc9000024ff10: ffffc9000024fe98 (0xffffc9000024fe98) ffffc9000024ff18: 00007fffc4614d00 (0x7fffc4614d00) ffffc9000024ff20: ffffffffffffff10 (0xffffffffffffff10) ffffc9000024ff28: ffffffff811c6c1f (SyS_newlstat+0xf/0x10) ffffc9000024ff30: 0000000000000010 (0x10) ffffc9000024ff38: 0000000000000296 (0x296) ffffc9000024ff40: ffffc9000024ff50 (0xffffc9000024ff50) ffffc9000024ff48: 0000000000000018 (0x18) ffffc9000024ff50: ffffffff816b2e6a (entry_SYSCALL_64_fastpath+0x18/0xa8) ... It unwinded from an interrupt which came in right after entry code called into a C syscall handler, before it had a chance to set up the frame pointer, so regs->bp still had its user space value. Add a check to silence warnings in such a case, where an interrupt has occurred and regs->sp is almost at the end of the stack. Reported-by:
Borislav Petkov <bp@suse.de> Tested-by:
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- 21 Apr, 2017 1 commit
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Steven Rostedt (VMware) authored
Fengguang Wu's zero day bot triggered a stack unwinder dump. This can be easily triggered when CONFIG_FRAME_POINTERS is enabled and -mfentry is in use on x86_32. ># cd /sys/kernel/debug/tracing ># echo 'p:schedule schedule' > kprobe_events ># echo stacktrace > events/kprobes/schedule/trigger This is because the code that implemented fentry in the ftrace_regs_caller tried to use the least amount of #ifdefs, and modified ebp when CC_USE_FENTRY was defined to point to the parent ip as it does when CC_USE_FENTRY is not defined. But when CONFIG_FRAME_POINTERS is set, it corrupts the ebp register for this frame while doing the tracing. NOTE, it does not corrupt ebp in any other way. It is just a bad frame pointer when calling into the tracing infrastructure. The original ebp is restored before returning from the fentry call. But if a stack trace is performed inside the tracing, the unwinder will notice the bad ebp. Instead of toying with ebp with CC_USING_FENTRY, just slap the parent ip into the second parameter (%edx), and have an #else that does it the original way. The unwinder will unfortunately miss the function being traced, as the stack frame is not set up yet for it, as it is for x86_64. But fixing that is a bit more complex and did not work before anyway. This has been tested with and without FRAME_POINTERS being set while using -mfentry, as well as using an older compiler that uses mcount. Analyzed-by:
kernel test robot <fengguang.wu@intel.com> Signed-off-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Link: https://lists.01.org/pipermail/lkp/2017-April/006165.html Link: http://lkml.kernel.org/r/20170420172236.7af7f6e5@gandalf.local.homeSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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- 19 Apr, 2017 3 commits
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Josh Poimboeuf authored
The 'sp' parameter to unwind_dump() is unused. Remove it. Signed-off-by:
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Josh Poimboeuf authored
In unwind_dump(), the stack mask value is printed in hex, but is confusingly not prepended with '0x'. Signed-off-by:
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Josh Poimboeuf authored
On x86-32, 32-bit stack values printed by unwind_dump() are confusingly zero-padded to 16 characters (64 bits): unwind stack type:0 next_sp: (null) mask:a graph_idx:0 f50cdebc: 00000000f50cdec4 (0xf50cdec4) f50cdec0: 00000000c40489b7 (irq_exit+0x87/0xa0) ... Instead, base the field width on the size of a long integer so that it looks right on both x86-32 and x86-64. x86-32: unwind stack type:1 next_sp: (null) mask:0x2 graph_idx:0 c0ee9d98: c0ee9de0 (init_thread_union+0x1de0/0x2000) c0ee9d9c: c043fd90 (__save_stack_trace+0x50/0xe0) ... x86-64: unwind stack type:1 next_sp: (null) mask:0x2 graph_idx:0 ffffffff81e03b88: ffffffff81e03c10 (init_thread_union+0x3c10/0x4000) ffffffff81e03b90: ffffffff81048f8e (__save_stack_trace+0x5e/0x100) ... Reported-by:
H. Peter Anvin <hpa@zytor.com> Signed-off-by:
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- 18 Apr, 2017 1 commit
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Josh Poimboeuf authored
With frame pointers disabled, on some older versions of GCC (like 4.8.3), it's possible for the stack pointer to get aligned at a half-word boundary: 00000000000004d0 <fib_table_lookup>: 4d0: 41 57 push %r15 4d2: 41 56 push %r14 4d4: 41 55 push %r13 4d6: 41 54 push %r12 4d8: 55 push %rbp 4d9: 53 push %rbx 4da: 48 83 ec 24 sub $0x24,%rsp In such a case, the unwinder ends up reading the entire stack at the wrong alignment. Then the last read goes past the end of the stack, hitting the stack guard page: BUG: stack guard page was hit at ffffc900217c4000 (stack is ffffc900217c0000..ffffc900217c3fff) kernel stack overflow (page fault): 0000 [#1] SMP ... Fix it by ensuring the stack pointer is properly aligned before unwinding. Reported-by:Jirka Hladky <jhladky@redhat.com> Signed-off-by:
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- 14 Apr, 2017 4 commits
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Peter Zijlstra authored
Dan reported that his static checking complains about BUGFLAG_WARNING being set on both sides of the bitwise-or, it figures that that might've been an unintentional mistake. Since there are no architectures that implement __WARN_TAINT() (I converted them all to implement __WARN_FLAGS()), and all __WARN_FLAGS() implementations already set BUGFLAG_WARNING, we can remove the bit from BUGFLAG_TAINT() and make Dan's checker happy. Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20170410084939.4bwhrvpmauwfzauq@hirez.programming.kicks-ass.netSigned-off-by:
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Josh Poimboeuf authored
A few people have reported unwinder warnings like the following: WARNING: kernel stack frame pointer at ffffc90000fe7ff0 in rsync:1157 has bad value (null) unwind stack type:0 next_sp: (null) mask:2 graph_idx:0 ffffc90000fe7f98: ffffc90000fe7ff0 (0xffffc90000fe7ff0) ffffc90000fe7fa0: ffffffffb7000f56 (trace_hardirqs_off_thunk+0x1a/0x1c) ffffc90000fe7fa8: 0000000000000246 (0x246) ffffc90000fe7fb0: 0000000000000000 ... ffffc90000fe7fc0: 00007ffe3af639bc (0x7ffe3af639bc) ffffc90000fe7fc8: 0000000000000006 (0x6) ffffc90000fe7fd0: 00007f80af433fc5 (0x7f80af433fc5) ffffc90000fe7fd8: 00007ffe3af638e0 (0x7ffe3af638e0) ffffc90000fe7fe0: 00007ffe3af638e0 (0x7ffe3af638e0) ffffc90000fe7fe8: 00007ffe3af63970 (0x7ffe3af63970) ffffc90000fe7ff0: 0000000000000000 ... ffffc90000fe7ff8: ffffffffb7b74b9a (entry_SYSCALL_64_after_swapgs+0x17/0x4f) This warning can happen when unwinding a code path where an interrupt occurred in x86 entry code before it set up the first stack frame. Silently ignore any warnings for this case. Reported-by:
Daniel Borkmann <daniel@iogearbox.net> Reported-by:
Dave Jones <davej@codemonkey.org.uk> Signed-off-by:
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Josh Poimboeuf authored
Instead of reading the return address when unwind_get_return_address() is called, read it from update_stack_state() and store it in the unwind state. This enables the next patch to check the return address from unwind_next_frame() so it can detect an entry code frame. Signed-off-by:
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Josh Poimboeuf authored
The __unwind_start() and unwind_next_frame() functions have some duplicated functionality. They both call decode_frame_pointer() and set state->regs and state->bp accordingly. Move that functionality to a common place in update_stack_state(). Signed-off-by:
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- 03 Apr, 2017 1 commit
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Peter Zijlstra authored
The kbuild test robot reported this build failure on a number of architectures: > make.cross ARCH=arm > lib/lib.a(bug.o): In function `find_bug': > >> lib/bug.c:135: undefined reference to `__start___bug_table' > >> lib/bug.c:135: undefined reference to `__stop___bug_table' Caused by: 19d43626 ("debug: Add _ONCE() logic to report_bug()") Which moved the BUG_TABLE from RO_DATA_SECTION() to RW_DATA_SECTION(), but a number of architectures don't use RW_DATA_SECTION(), so they ended up with no __bug_table[] ... Ideally all those would use RW_DATA_SECTION() in their linker scripts, but that's for another day. Signed-off-by:
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- 30 Mar, 2017 2 commits
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Peter Zijlstra authored
Josh suggested moving the _ONCE logic inside the trap handler, using a bit in the bug_entry::flags field, avoiding the need for the extra variable. Sadly this only works for WARN_ON_ONCE(), since the others have printk() statements prior to triggering the trap. Still, this saves a fair amount of text and some data: text data filename 10682460 4530992 defconfig-build/vmlinux.orig 10665111 4530096 defconfig-build/vmlinux.patched Suggested-by:
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Arnd Bergmann authored
The latest change to the BUG() macro inadvertently reverted the earlier commit: b06dd879 ("x86: always define BUG() and HAVE_ARCH_BUG, even with !CONFIG_BUG") ... that sanitized the behavior with CONFIG_BUG=n. I noticed this as some warnings have appeared again that were previously fixed as a side effect of that patch: kernel/seccomp.c: In function '__seccomp_filter': kernel/seccomp.c:670:1: error: no return statement in function returning non-void [-Werror=return-type] ... This combines the two patches and uses the ud2 macro to define BUG() in case of CONFIG_BUG=n. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 9a93848f ("x86/debug: Implement __WARN() using UD0") Link: http://lkml.kernel.org/r/20170329211646.2707365-1-arnd@arndb.deSigned-off-by:
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- 27 Mar, 2017 1 commit
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Peter Zijlstra authored
By using "UD0" for WARN()s we remove the function call and its possible __FILE__ and __LINE__ immediate arguments from the instruction stream. Total image size will not change much, what we win in the instruction stream we'll lose because of the __bug_table entries. Still, saves on I$ footprint and the total image size does go down a bit. text data filename 10702123 4530992 defconfig-build/vmlinux.orig 10682460 4530992 defconfig-build/vmlinux.patched (UML didn't seem to use GENERIC_BUG at all, so remove it) Signed-off-by:
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- 24 Mar, 2017 6 commits
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Steven Rostedt (VMware) authored
Currently ftrace_32.S and ftrace_64.S are compiled even when CONFIG_FUNCTION_TRACER is not set. This means there's an unnecessary #ifdef to protect the code. Instead of using preprocessor directives, only compile those files when FUNCTION_TRACER is defined. Suggested-by:
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Steven Rostedt (VMware) authored
x86_64 has had fentry support for some time. I did not add support to x86_32 as I was unsure if it will be used much in the future. It is still very much used, and there's issues with function graph tracing with gcc playing around with the mcount frames, causing function graph to panic. The fentry code does not have this issue, and is able to cope as there is no frame to mess up. Note, this only adds support for fentry when DYNAMIC_FTRACE is set. There's really no reason to not have that set, because the performance of the machine drops significantly when it's not enabled. Keep !DYNAMIC_FTRACE around to test it off, as there's still some archs that have FTRACE but not DYNAMIC_FTRACE. Signed-off-by:
Masami Hiramatsu <mhiramat@kernel.org> Reviewed-by:
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Steven Rostedt (VMware) authored
When ftrace_regs_caller was created, it was designed to preserve flags as much as possible as it needed to act just like a breakpoint triggered on the same location. But the design is over complicated as it treated all operations as modifying flags. But push, mov and lea do not modify flags. This means the code can become more simplified by allowing flags to be stored further down. Making ftrace_regs_caller simpler will also be useful in implementing fentry logic. Suggested-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Steven Rostedt (VMware) authored
The function hook ftrace_caller does not create its own stack frame, and this causes the ftrace stack trace to miss the first function when doing stack traces. # echo schedule:stacktrace > /sys/kernel/tracing/set_ftrace_filter Before: <idle>-0 [002] .N.. 29.865807: <stack trace> => cpu_startup_entry => start_secondary => startup_32_smp <...>-7 [001] .... 29.866509: <stack trace> => kthread => ret_from_fork <...>-1 [000] .... 29.865377: <stack trace> => poll_schedule_timeout => do_select => core_sys_select => SyS_select => do_fast_syscall_32 => entry_SYSENTER_32 After: <idle>-0 [002] .N.. 31.234853: <stack trace> => do_idle => cpu_startup_entry => start_secondary => startup_32_smp <...>-7 [003] .... 31.235140: <stack trace> => rcu_gp_kthread => kthread => ret_from_fork <...>-1819 [000] .... 31.264172: <stack trace> => schedule_hrtimeout_range => poll_schedule_timeout => do_sys_poll => SyS_ppoll => do_fast_syscall_32 => entry_SYSENTER_32 Signed-off-by: -
Steven Rostedt (VMware) authored
The function tracing hook code for ftrace is not an entry point from userspace and does not belong in the entry_*.S files. It has already been moved out of entry_64.S. Move it out of entry_32.S into its own ftrace_32.S file. Signed-off-by:
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Steven Rostedt (VMware) authored
With the advent of -mfentry that uses the new "fentry" hook over mcount, the mcount name is obsolete. Having the code file that ftrace hooks into called "mcount*.S" is rather misleading. Rename it to ftrace_64.S and remove the file name reference. Signed-off-by:
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- 23 Mar, 2017 1 commit
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Ingo Molnar authored
Signed-off-by:
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- 21 Mar, 2017 11 commits
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Huang Ying authored
Before commit 452b94b8 ("mm/swap: don't BUG_ON() due to uninitialized swap slot cache"), the following bug is reported, ------------[ cut here ]------------ kernel BUG at mm/swap_slots.c:270! invalid opcode: 0000 [#1] SMP CPU: 5 PID: 1745 Comm: (sd-pam) Not tainted 4.11.0-rc1-00243-g24c534bb #1 Hardware name: System manufacturer System Product Name/Z170-K, BIOS 1803 05/06/2016 RIP: 0010:free_swap_slot+0xba/0xd0 Call Trace: swap_free+0x36/0x40 do_swap_page+0x360/0x6d0 __handle_mm_fault+0x880/0x1080 handle_mm_fault+0xd0/0x240 __do_page_fault+0x232/0x4d0 do_page_fault+0x20/0x70 page_fault+0x22/0x30 ---[ end trace aefc9ede53e0ab21 ]--- This is raised by the BUG_ON(!swap_slot_cache_initialized) in free_swap_slot(). This is incorrect, because even if the swap slots cache fails to be initialized, the swap should operate properly without the swap slots cache. And the use_swap_slot_cache check later in the function will protect the uninitialized swap slots cache case. In commit 452b94b8, the BUG_ON() is replaced by WARN_ON_ONCE(). In the patch, the WARN_ON_ONCE() is removed too. Reported-by:
Tim Chen <tim.c.chen@linux.intel.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by:
"Huang, Ying" <ying.huang@intel.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "Nine small fixes: the biggest is probably finally sorting out Kconfig issues with lpfc nvme. There are some performance fixes for megaraid and hpsa and a static checker fix" [ Johannes Thumshirn points out that there still seems to be more lpfc vs nvme config issues. Oh well. - Linus ] * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: lpfc: Finalize Kconfig options for nvme scsi: ufs: don't check unsigned type for a negative value scsi: hpsa: do not timeout reset operations scsi: hpsa: limit outstanding rescans scsi: hpsa: update check for logical volume status scsi: megaraid_sas: Driver version upgrade scsi: megaraid_sas: raid6 also require cpuSel check same as raid5 scsi: megaraid_sas: add correct return type check for ldio hint logic for raid1 scsi: megaraid_sas: enable intx only if msix request fails
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hidLinus Torvalds authored
Pull HID fixes from Jiri Kosina: - regression fixes for Wacom devices, from Aaron Armstrong Skomra and Ping Cheng - memory leak in hid-sony driver from Roderick Colenbrander - new device IDs support from Oscar Campos and Daniel Drake * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: wacom: generic: Wacom mouse is only provided for opaque tablets HID: corsair: Add driver Scimitar Pro RGB gaming mouse 1b1c:1b3e support to hid-corsair HID: corsair: support for K65-K70 Rapidfire and Scimitar Pro RGB HID: wacom: don't manually release resources for the EKR HID: wacom: Correct Intuos Pro 2 resolution HID: sony: Fix input device leak when connecting a DS4 twice using USB/BT HID: chicony: Add support for another ASUS Zen AiO keyboard
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpioLinus Torvalds authored
Pull GPIO fixes from Linus Walleij: "Here is the first set of GPIO fixes for 4.11. It was delayed a bit beacuse I was chicken when linux-next was not rotating last week. This hits the ST serial driver in drivers/tty/serial and that has an ACK from Greg, he suggested to keep the old GPIO fwnode API around to smoothen things in the merge Windod and those have now served their purpose so we take them out and convert the last driver to the new API. Apart from that it's fixes as usual. Summary: - set the parent on the Altera A10SR driver, also fix high level IRQs. - fix error path on the mockup driver. - compilation noise about unused functions fixed. - fix missed interrupts on the MCP23S08 expander, this is also tagged for stable. - retire the interrim helpers devm_get_gpiod_from_child() used to smoothen merging in the merge window" * tag 'gpio-v4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio:mcp23s08 Fixed missing interrupts serial: st-asc: Use new GPIOD API to obtain RTS pin gpio: altera: Use handle_level_irq when configured as a level_high gpio: xgene: mark PM functions as __maybe_unused gpio: mockup: return -EFAULT if copy_from_user() fails gpio: altera-a10sr: Set gpio_chip parent property -
git://github.com/andersson/remoteprocLinus Torvalds authored
Pull remoteproc fix from Bjorn Andersson: "This fixes a Kbuild dependency issue related to the Qualcomm remoteproc drivers" * tag 'rproc-v4.11-fixes' of git://github.com/andersson/remoteproc: remoteproc: qcom: fix QCOM_SMD dependencies
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git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fsLinus Torvalds authored
Pull f2fs fixes from Jaegeuk Kim: - fix performance regression reported by lkp-rebot - fix potential data lost after power-cut due to SSR reallocation * tag 'for-f2fs-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: f2fs: combine nat_bits and free_nid_bitmap cache f2fs: skip scanning free nid bitmap of full NAT blocks f2fs: use __set{__clear}_bit_le f2fs: declare static functions f2fs: don't overwrite node block by SSR
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Ping Cheng authored
Commit f85c9dc6 ("Support tool ID and additional tool types") introduced mouse and lens cursor tools to generic codepath, which covers both display (direct) and opaque tablets (indirect devices). However, mouse and lens cursor tools are only provided for opaque tablets. This patch ignores mouse and lens cursor tools if the device is a display tablet. Signed-off-by:
Ping Cheng <ping.cheng@wacom.com> Reviewed-by:
Jason Gerecke <jason.gerecke@wacom.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz>
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Oscar Campos authored
This mouse sold by Corsair as Scimitar PRO RGB defines two consecutive Logical Minimum items in its Application (Consumer.0001) report making it non parseable. This patch fixes the report descriptor overriding byte 77 in rdesc from 0x16 (Logical Minimum with 16 bits value) to 0x26 (Logical Maximum with 16 bits value). Signed-off-by:
Oscar Campos <oscar.campos@member.fsf.org> Signed-off-by:
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Oscar Campos authored
Add quirks for several corsair gaming devices to avoid long delays on report initialization Supported devices: - Corsair K65RGB Rapidfire Gaming Keyboard - Corsair K70RGB Rapidfire Gaming Keyboard - Corsair Scimitar Pro RGB Gaming Mouse Signed-off-by:
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Aaron Armstrong Skomra authored
Commit 5b779fc5 introduces the manual release of resources in wacom_remove() as an addition to the driver's use of devm. The EKR resources can only be released through wacom_remote_destroy_one() so we skip the manual release for it. Fixes: 5b779fc5 ("HID: wacom: release the resources before leaving despite devm") Signed-off-by:
Aaron Armstrong Skomra <skomra@gmail.com> Reviewed-by:
Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by:
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Aaron Armstrong Skomra authored
The features struct for the second gen Intuos Pro uses the wrong constant for the resolution. This fix is for commit 4922cd26. Fixes: 4922cd26 ("HID: wacom: Support 2nd-gen Intuos Pro's Bluetooth classic interface") Signed-off-by:
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- 20 Mar, 2017 7 commits
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Arnd Bergmann authored
qcom_smd_register_edge() is provided by either QCOM_SMD or RPMSG_QCOM_SMD, and if both of them are disabled, it does nothing. The check for the PIL drivers however only checks for QCOM_SMD, so it breaks with QCOM_SMD=n && RPMSG_QCOM_SMD=m: drivers/remoteproc/built-in.o: In function `smd_subdev_remove': qcom_wcnss_iris.c:(.text+0x231c): undefined reference to `qcom_smd_unregister_edge' drivers/remoteproc/built-in.o: In function `smd_subdev_probe': qcom_wcnss_iris.c:(.text+0x2344): undefined reference to `qcom_smd_register_edge' drivers/remoteproc/built-in.o: In function `smd_subdev_probe': qcom_q6v5_pil.c:(.text+0x3538): undefined reference to `qcom_smd_register_edge' qcom_q6v5_pil.c:(.text+0x3538): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `qcom_smd_register_edge' This clarifies the Kconfig dependency. Fixes: 4b48921a ("remoteproc: qcom: Use common SMD edge handler") Signed-off-by:
Bjorn Andersson <bjorn.andersson@linaro.org>
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Chao Yu authored
Both nat_bits cache and free_nid_bitmap cache provide same functionality as a intermediate cache between free nid cache and disk, but with different granularity of indicating free nid range, and different persistence policy. nat_bits cache provides better persistence ability, and free_nid_bitmap provides better granularity. In this patch we combine advantage of both caches, so finally policy of the intermediate cache would be: - init: load free nid status from nat_bits into free_nid_bitmap - lookup: scan free_nid_bitmap before load NAT blocks - update: update free_nid_bitmap in real-time - persistence: udpate and persist nat_bits in checkpoint This patch also resolves performance regression reported by lkp-robot. commit: 4ac91242 ("f2fs: introduce free nid bitmap") d00030cf9cd0bb96fdccc41e33d3c91dcbb672ba ("f2fs: use __set{__clear}_bit_le") 1382c0f3f9d3f936c8bc42ed1591cf7a593ef9f7 ("f2fs: combine nat_bits and free_nid_bitmap cache") 4ac91242 d00030cf9cd0bb96fdccc41e33 1382c0f3f9d3f936c8bc42ed15 ---------------- -------------------------- -------------------------- %stddev %change %stddev %change %stddev \ | \ | \ 77863 ± 0% +2.1% 79485 ± 1% +50.8% 117404 ± 0% aim7.jobs-per-min 231.63 ± 0% -2.0% 227.01 ± 1% -33.6% 153.80 ± 0% aim7.time.elapsed_time 231.63 ± 0% -2.0% 227.01 ± 1% -33.6% 153.80 ± 0% aim7.time.elapsed_time.max 896604 ± 0% -0.8% 889221 ± 3% -20.2% 715260 ± 1% aim7.time.involuntary_context_switches 2394 ± 1% +4.6% 2503 ± 1% +3.7% 2481 ± 2% aim7.time.maximum_resident_set_size 6240 ± 0% -1.5% 6145 ± 1% -14.1% 5360 ± 1% aim7.time.system_time 1111357 ± 3% +1.9% 1132509 ± 2% -6.2% 1041932 ± 2% aim7.time.voluntary_context_switches ... Signed-off-by:
Chao Yu <yuchao0@huawei.com> Tested-by:
Xiaolong Ye <xiaolong.ye@intel.com> Signed-off-by:
Jaegeuk Kim <jaegeuk@kernel.org>
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Chao Yu authored
This patch adds to account free nids for each NAT blocks, and while scanning all free nid bitmap, do check count and skip lookuping in full NAT block. Signed-off-by:
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Jaegeuk Kim authored
This patch uses __set{__clear}_bit_le for highter speed. Reviewed-by: -
Jaegeuk Kim authored
This is to avoid build warning reported by kbuild test robot. Signed-off-by:
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Jaegeuk Kim authored
This patch fixes that SSR can overwrite previous warm node block consisting of a node chain since the last checkpoint. Fixes: 5b6c6be2 ("f2fs: use SSR for warm node as well") Reviewed-by:
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Linus Torvalds authored
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