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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-10-31 03:18:00 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-10-31 03:18:00 +0300 |
| commit | 5780e39edbb49bb441f1c8eb9e6cb8be92dee31d (patch) | |
| tree | 0b0aa6e1896db838785fce2ed078e3b7e07ab98d /arch/x86/entry | |
| parent | 2b95bb052656d46c2073b87f9487a53ef5e79732 (diff) | |
| parent | 8ae292c66dcb160b3e1e16b66c3076d5a2c63873 (diff) | |
| download | linux-5780e39edbb49bb441f1c8eb9e6cb8be92dee31d.tar.xz | |
Merge tag 'x86-asm-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 assembly code updates from Ingo Molnar:
- Micro-optimize the x86 bitops code
- Define target-specific {raw,this}_cpu_try_cmpxchg{64,128}() to
improve code generation
- Define and use raw_cpu_try_cmpxchg() preempt_count_set()
- Do not clobber %rsi in percpu_{try_,}cmpxchg{64,128}_op
- Remove the unused __sw_hweight64() implementation on x86-32
- Misc fixes and cleanups
* tag 'x86-asm-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/lib: Address kernel-doc warnings
x86/entry: Fix typos in comments
x86/entry: Remove unused argument %rsi passed to exc_nmi()
x86/bitops: Remove unused __sw_hweight64() assembly implementation on x86-32
x86/percpu: Do not clobber %rsi in percpu_{try_,}cmpxchg{64,128}_op
x86/percpu: Use raw_cpu_try_cmpxchg() in preempt_count_set()
x86/percpu: Define raw_cpu_try_cmpxchg and this_cpu_try_cmpxchg()
x86/percpu: Define {raw,this}_cpu_try_cmpxchg{64,128}
x86/asm/bitops: Use __builtin_clz{l|ll} to evaluate constant expressions
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/entry_64.S | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index be08efa33e9f..d656924eefc2 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -1163,8 +1163,8 @@ SYM_CODE_START(asm_exc_nmi) * anyway. * * To handle this case we do the following: - * Check the a special location on the stack that contains - * a variable that is set when NMIs are executing. + * Check a special location on the stack that contains a + * variable that is set when NMIs are executing. * The interrupted task's stack is also checked to see if it * is an NMI stack. * If the variable is not set and the stack is not the NMI @@ -1237,7 +1237,6 @@ SYM_CODE_START(asm_exc_nmi) */ movq %rsp, %rdi - movq $-1, %rsi call exc_nmi /* @@ -1295,8 +1294,8 @@ SYM_CODE_START(asm_exc_nmi) * end_repeat_nmi, then we are a nested NMI. We must not * modify the "iret" frame because it's being written by * the outer NMI. That's okay; the outer NMI handler is - * about to about to call exc_nmi() anyway, so we can just - * resume the outer NMI. + * about to call exc_nmi() anyway, so we can just resume + * the outer NMI. */ movq $repeat_nmi, %rdx @@ -1451,7 +1450,6 @@ end_repeat_nmi: UNWIND_HINT_REGS movq %rsp, %rdi - movq $-1, %rsi call exc_nmi /* Always restore stashed SPEC_CTRL value (see paranoid_entry) */ |