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author | Ingo Molnar <mingo@elte.hu> | 2012-03-05 09:20:08 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2012-03-05 09:20:08 +0100 |
commit | 737f24bda723fdf89ecaacb99fa2bf5683c32799 (patch) | |
tree | 35495fff3e9956679cb5468e74e6814c8e44ee66 /arch/x86/kernel/entry_64.S | |
parent | static keys: Inline the static_key_enabled() function (diff) | |
parent | Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent (diff) | |
download | linux-dev-737f24bda723fdf89ecaacb99fa2bf5683c32799.tar.xz linux-dev-737f24bda723fdf89ecaacb99fa2bf5683c32799.zip |
Merge branch 'perf/urgent' into perf/core
Conflicts:
tools/perf/builtin-record.c
tools/perf/builtin-top.c
tools/perf/perf.h
tools/perf/util/top.h
Merge reason: resolve these cherry-picking conflicts.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/entry_64.S')
-rw-r--r-- | arch/x86/kernel/entry_64.S | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 3fe8239fd8fb..1333d9851778 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -1532,10 +1532,17 @@ ENTRY(nmi) pushq_cfi %rdx /* + * If %cs was not the kernel segment, then the NMI triggered in user + * space, which means it is definitely not nested. + */ + cmpl $__KERNEL_CS, 16(%rsp) + jne first_nmi + + /* * Check the special variable on the stack to see if NMIs are * executing. */ - cmp $1, -8(%rsp) + cmpl $1, -8(%rsp) je nested_nmi /* |