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git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost into asm-generic
Merge "uaccess: fix sparse warning on get/put_user for bitwise types" from Michael S. Tsirkin:
At the moment, if p and x are both tagged as bitwise types,
some of get_user(x, p), put_user(x, p), __get_user(x, p), __put_user(x, p)
might produce a sparse warning on many architectures.
This is a false positive: *p on these architectures is loaded into long
(typically using asm), then cast back to typeof(*p).
When typeof(*p) is a bitwise type (which is uncommon), such a cast needs
__force, otherwise sparse produces a warning.
Some architectures already have the __force tag, add it
where it's missing.
I verified that adding these __force casts does not supress any useful warnings.
Specifically, vhost wants to read/write bitwise types in userspace memory
using get_user/put_user.
At the moment this triggers sparse errors, since the value is passed through an
integer.
For example:
__le32 __user *p;
__u32 x;
both
put_user(x, p);
and
get_user(x, p);
should be safe, but produce warnings on some architectures.
While there, I noticed that a bunch of architectures violated
coding style rules within uaccess macros.
Included patches to fix them up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* tag 'uaccess_for_upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (37 commits)
sparc32: nocheck uaccess coding style tweaks
sparc64: nocheck uaccess coding style tweaks
xtensa: macro whitespace fixes
sh: macro whitespace fixes
parisc: macro whitespace fixes
m68k: macro whitespace fixes
m32r: macro whitespace fixes
frv: macro whitespace fixes
cris: macro whitespace fixes
avr32: macro whitespace fixes
arm64: macro whitespace fixes
arm: macro whitespace fixes
alpha: macro whitespace fixes
blackfin: macro whitespace fixes
sparc64: uaccess_64 macro whitespace fixes
sparc32: uaccess_32 macro whitespace fixes
avr32: whitespace fix
sh: fix put_user sparse errors
metag: fix put_user sparse errors
ia64: fix put_user sparse errors
...
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Sam Ravnborg suggested packing single-lines cases in switch statements
in nocheck uaccess macros makes for easier to read code.
Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
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Sam Ravnborg suggested packing single-lines cases in switch statements
in nocheck uaccess macros makes for easier to read code.
Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
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While working on arch/xtensa/include/asm/uaccess.h, I noticed
that some macros within this header are made harder to read because they
violate a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
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While working on arch/sh/include/asm/uaccess.h, I noticed
that one macro within this header is made harder to read because it
violates a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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While working on arch/parisc/include/asm/uaccess.h, I noticed
that some macros within this header are made harder to read because they
violate a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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While working on arch/m68k/include/asm/uaccess.h, I noticed
that one macro within this header is made harder to read because it
violates a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
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While working on arch/m32r/include/asm/uaccess.h, I noticed
that some macros within this header are made harder to read because they
violate a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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While working on arch/frv/include/asm/uaccess.h, I noticed
that one macro within this header is made harder to read because it
violates a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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While working on arch/cris/include/asm/uaccess.h, I noticed
that some macros within this header are made harder to read because they
violate a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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While working on arch/avr32/include/asm/uaccess.h, I noticed
that some macros within this header are made harder to read because they
violate a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
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While working on arch/arm64/include/asm/uaccess.h, I noticed
that one macro within this header is made harder to read because it
violates a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Will Deacon <will.deacon@arm.com>
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While working on arch/arm/include/asm/uaccess.h, I noticed
that some macros within this header are made harder to read because they
violate a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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While working on arch/alpha/include/asm/uaccess.h, I noticed
that some macros within this header are made harder to read because they
violate a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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While working on arch/blackfin/include/asm/uaccess.h, I noticed
that some macros within this header are made harder to read because they
violate a coding style rule: space is missing after comma.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Macros within arch/sparc/include/asm/uaccess_64.h are made harder to
read because they violate a bunch of coding style rules.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: David S. Miller <davem@davemloft.net>
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Macros within arch/sparc/include/asm/uaccess_32.h are made harder to
read because they violate a bunch of coding style rules.
Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: David S. Miller <davem@davemloft.net>
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Align using tabs to make code prettier.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
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virtio wants to write bitwise types to userspace using put_user.
At the moment this triggers sparse errors, since the value is passed
through an integer.
For example:
__le32 __user *p;
__le32 x;
put_user(x, p);
is safe, but currently triggers a sparse warning.
Fix that up using __force.
Note: this does not suppress any useful sparse checks since caller
assigns x to typeof(*p), which in turn forces all the necessary type
checks.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio wants to write bitwise types to userspace using put_user.
At the moment this triggers sparse errors, since the value is passed
through an integer.
For example:
__le32 __user *p;
__le32 x;
put_user(x, p);
is safe, but currently triggers a sparse warning.
Fix that up using __force.
This also fixes warnings due to writing a pointer out to
userland.
Note: this does not suppress any useful sparse checks since callers
do a cast (__typeof__(*(ptr))) (x) which in turn forces all the
necessary type checks.
Suggested-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: James Hogan <james.hogan@imgtec.com>
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virtio wants to write bitwise types to userspace using put_user.
At the moment this triggers sparse errors, since the value is passed
through an integer.
For example:
__le32 __user *p;
__le32 x;
put_user(x, p);
is safe, but currently triggers a sparse warning.
Fix that up using __force.
Note: this does not suppress any useful sparse checks since callers
do a cast (__typeof__(*(ptr))) (x) which in turn forces all the
necessary type checks.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio wants to write bitwise types to userspace using put_user.
At the moment this triggers sparse errors, since the value is passed
through an integer.
For example:
__le32 __user *p;
__le32 x;
put_user(x, p);
is safe, but currently triggers a sparse warning.
Fix that up using __force.
Note: this does not suppress any useful sparse checks since caller
assigns x to typeof(*p), which in turn forces all the necessary type
checks.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio wants to write bitwise types to userspace using put_user.
At the moment this triggers sparse errors, since the value is passed
through an integer.
For example:
__le32 __user *p;
__le32 x;
put_user(x, p);
is safe, but currently triggers a sparse warning.
Fix that up using __force.
Note: this does not suppress any useful sparse checks since caller
assigns x to typeof(*p), which in turn forces all the necessary type
checks.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: David S. Miller <davem@davemloft.net>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: David S. Miller <davem@davemloft.net>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Helge Deller <deller@gmx.de>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: James Hogan <james.hogan@imgtec.com>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Steven Miao <realmz6@gmail.com>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Will Deacon <will.deacon@arm.com>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio wants to read bitwise types from userspace using get_user. At the
moment this triggers sparse errors, since the value is passed through an
integer.
Fix that up using __force.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
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Pull ARM fixes from Russell King:
"Three small fixes from over the Christmas period, and wiring up the
new execveat syscall for ARM"
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: 8275/1: mm: fix PMD_SECT_RDONLY undeclared compile error
ARM: 8253/1: mm: use phys_addr_t type in map_lowmem() for kernel mem region
ARM: 8249/1: mm: dump: don't skip regions
ARM: wire up execveat syscall
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Misc fixes: two vdso fixes, two kbuild fixes and a boot failure fix
with certain odd memory mappings"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, vdso: Use asm volatile in __getcpu
x86/build: Clean auto-generated processor feature files
x86: Fix mkcapflags.sh bash-ism
x86: Fix step size adjustment during initial memory mapping
x86_64, vdso: Fix the vdso address randomization algorithm
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Mostly tooling fixes, but also some kernel side fixes: uncore PMU
driver fix, user regs sampling fix and an instruction decoder fix that
unbreaks PEBS precise sampling"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/uncore/hsw-ep: Handle systems with only two SBOXes
perf/x86_64: Improve user regs sampling
perf: Move task_pt_regs sampling into arch code
x86: Fix off-by-one in instruction decoder
perf hists browser: Fix segfault when showing callchain
perf callchain: Free callchains when hist entries are deleted
perf hists: Fix children sort key behavior
perf diff: Fix to sort by baseline field by default
perf list: Fix --raw-dump option
perf probe: Fix crash in dwarf_getcfi_elf
perf probe: Fix to fall back to find probe point in symbols
perf callchain: Append callchains only when requested
perf ui/tui: Print backtrace symbols when segfault occurs
perf report: Show progress bar for output resorting
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"Here is a handful of minor arm64 fixes discovered and fixed over the
Christmas break. The main part is adding some missing #includes that
we seem to be getting transitively but have started causing problems
in -next.
- Fix early mapping fixmap corruption by EFI runtime services
- Fix __NR_compat_syscalls off-by-one
- Add missing sanity checks for some 32-bit registers
- Add some missing #includes which we get transitively
- Remove unused prepare_to_copy() macro"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64/efi: add missing call to early_ioremap_reset()
arm64: fix missing asm/io.h include in kernel/smp_spin_table.c
arm64: fix missing asm/alternative.h include in kernel/module.c
arm64: fix missing linux/bug.h include in asm/arch_timer.h
arm64: fix missing asm/pgtable-hwdef.h include in asm/processor.h
arm64: sanity checks: add missing AArch32 registers
arm64: Remove unused prepare_to_copy()
arm64: Correct __NR_compat_syscalls for bpf
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Merge misc fixes from Andrew Morton:
"12 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm, vmscan: prevent kswapd livelock due to pfmemalloc-throttled process being killed
memcg: fix destination cgroup leak on task charges migration
mm: memcontrol: switch soft limit default back to infinity
mm/debug_pagealloc: remove obsolete Kconfig options
vfs: renumber FMODE_NONOTIFY and add to uniqueness check
arch/blackfin/mach-bf533/boards/stamp.c: add linux/delay.h
ocfs2: fix the wrong directory passed to ocfs2_lookup_ino_from_name() when link file
MAINTAINERS: update rydberg's addresses
mm: protect set_page_dirty() from ongoing truncation
mm: prevent endless growth of anon_vma hierarchy
exit: fix race between wait_consider_task() and wait_task_zombie()
ocfs2: remove bogus check in dlm_process_recovery_data
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In v3.19-rc3 tree when CONFIG_ARM_LPAE and CONFIG_DEBUG_RODATA are enabled
image failed to compile with the following error:
arch/arm/mm/init.c:661:14: error: ‘PMD_SECT_RDONLY’ undeclared here (not in a function)
It seems that '80d6b0c ARM: mm: allow text and rodata sections to be read-only'
and 'ded9477 ARM: 8109/1: mm: Modify pte_write and pmd_write logic for LPAE'
commits crossed. 80d6b0c uses PMD_SECT_RDONLY macro but ded9477 renames it
and uses software bits L_PMD_SECT_RDONLY instead.
Fix is to use L_PMD_SECT_RDONLY instead PMD_SECT_RDONLY as ded9477 does in
another places.
Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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There was another report of a boot failure with a #GP fault in the
uncore SBOX initialization. The earlier work around was not enough
for this system.
The boot was failing while trying to initialize the third SBOX.
This patch detects parts with only two SBOXes and limits the number
of SBOX units to two there.
Stable material, as it affects boot problems on 3.18.
Tested-by: Andreas Oehler <andreas@oehler-net.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yan, Zheng <zheng.z.yan@intel.com>
Link: http://lkml.kernel.org/r/1420583675-9163-1-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Perf reports user regs for kernel-mode samples so that samples can
be backtraced through user code. The old code was very broken in
syscall context, resulting in useless backtraces.
The new code, in contrast, is still dangerously racy, but it should
at least work most of the time.
Tested-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: chenggang.qcg@taobao.com
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/243560c26ff0f739978e2459e203f6515367634d.1420396372.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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On x86_64, at least, task_pt_regs may be only partially initialized
in many contexts, so x86_64 should not use it without extra care
from interrupt context, let alone NMI context.
This will allow x86_64 to override the logic and will supply some
scratch space to use to make a cleaner copy of user regs.
Tested-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: chenggang.qcg@taobao.com
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/e431cd4c18c2e1c44c774f10758527fb2d1025c4.1420396372.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Stephane reported that the PEBS fixup was broken by the recent commit to
the instruction decoder. The thing had an off-by-one which resulted in
not being able to decode the last instruction and always bail.
Reported-by: Stephane Eranian <eranian@google.com>
Fixes: 6ba48ff46f76 ("x86: Remove arbitrary instruction size limit in instruction decoder")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org # 3.18
Cc: <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Liang Kan <kan.liang@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Link: http://lkml.kernel.org/r/20141216104614.GV3337@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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build error
arch/blackfin/mach-bf533/boards/stamp.c:834:2: error: implicit declaration of function 'mdelay'
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI fixes from Rafael Wysocki:
"These are an ACPI device power management initialization fix (-stable
material), two commits renaming stuff in the ACPI processor driver to
make it more suitable for ARM64 processors and a new ACPI backlight
blacklist entry.
Specifics:
- Fix ACPI power management intialization for device objects
corresponding to devices that are not present at the init time (the
_STA control method returns 0 for them) and therefore should not be
regarded as power manageable (Rafael J Wysocki).
- Rename a structure field and two functions used by the ACPI
processor driver to make them less tied to architectures that use
APICs (both x86 and ia64) and more suitable for ARM64 processors
(Hanjun Guo).
- Add a disable_native_backlight quirk for Dell XPS15 L521X designed
in an unusual way preventing native backlight from working on that
machine (Hans de Goede)"
* tag 'pm+acpi-3.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / video: Add disable_native_backlight quirk for Dell XPS15 L521X
ACPI / processor: Rename acpi_(un)map_lsapic() to acpi_(un)map_cpu()
ACPI / processor: Convert apic_id to phys_id to make it arch agnostic
ACPI / PM: Fix PM initialization for devices that are not present
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