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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 15:55:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-06 15:55:15 -0700 |
| commit | 53f8b081c184328b82c8a7b5e70b8243b3cea8bd (patch) | |
| tree | 907a3a57c6539f5ad09064e487c1893ae2d6055f | |
| parent | Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (diff) | |
| parent | x86/entry: Remove unneeded need_resched() loop (diff) | |
| download | linux-dev-53f8b081c184328b82c8a7b5e70b8243b3cea8bd.tar.xz linux-dev-53f8b081c184328b82c8a7b5e70b8243b3cea8bd.zip | |
Merge branch 'x86-entry-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 entry cleanup from Ingo Molnar:
"A single commit that removes a redundant complication from
preempt-schedule handling in the x86 entry code"
* 'x86-entry-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/entry: Remove unneeded need_resched() loop
| -rw-r--r-- | arch/x86/entry/entry_32.S | 3 | ||||
| -rw-r--r-- | arch/x86/entry/entry_64.S | 3 |
2 files changed, 2 insertions, 4 deletions
diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index 5fc76b755510..7b23431be5cb 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -768,13 +768,12 @@ END(ret_from_exception) #ifdef CONFIG_PREEMPT ENTRY(resume_kernel) DISABLE_INTERRUPTS(CLBR_ANY) -.Lneed_resched: cmpl $0, PER_CPU_VAR(__preempt_count) jnz restore_all_kernel testl $X86_EFLAGS_IF, PT_EFLAGS(%esp) # interrupts off (exception path) ? jz restore_all_kernel call preempt_schedule_irq - jmp .Lneed_resched + jmp restore_all_kernel END(resume_kernel) #endif diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 1f0efdb7b629..e7e270603fe7 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -645,10 +645,9 @@ retint_kernel: /* Check if we need preemption */ btl $9, EFLAGS(%rsp) /* were interrupts off? */ jnc 1f -0: cmpl $0, PER_CPU_VAR(__preempt_count) + cmpl $0, PER_CPU_VAR(__preempt_count) jnz 1f call preempt_schedule_irq - jmp 0b 1: #endif /* |