* [GIT PULL] x86/entry change for v5.2
@ 2019-05-06 10:18 Ingo Molnar
2019-05-06 23:40 ` pr-tracker-bot
0 siblings, 1 reply; 2+ messages in thread
From: Ingo Molnar @ 2019-05-06 10:18 UTC (permalink / raw)
To: Linus Torvalds
Cc: linux-kernel, Thomas Gleixner, Borislav Petkov, Peter Zijlstra,
Andrew Morton
Linus,
Please pull the latest x86-entry-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-entry-for-linus
# HEAD: b5b447b6b4e899e0978b95cb42d272978f8c7b4d x86/entry: Remove unneeded need_resched() loop
This tree includes a single commit that removes a redundant complication
from preempt-schedule handling in the x86 entry code.
Thanks,
Ingo
------------------>
Valentin Schneider (1):
x86/entry: Remove unneeded need_resched() loop
arch/x86/entry/entry_32.S | 3 +--
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 d309f30cf7af..b1856fe9decf 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -766,13 +766,12 @@ 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
/*
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [GIT PULL] x86/entry change for v5.2
2019-05-06 10:18 [GIT PULL] x86/entry change for v5.2 Ingo Molnar
@ 2019-05-06 23:40 ` pr-tracker-bot
0 siblings, 0 replies; 2+ messages in thread
From: pr-tracker-bot @ 2019-05-06 23:40 UTC (permalink / raw)
To: Ingo Molnar
Cc: Linus Torvalds, linux-kernel, Thomas Gleixner, Borislav Petkov,
Peter Zijlstra, Andrew Morton
The pull request you sent on Mon, 6 May 2019 12:18:57 +0200:
> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-entry-for-linus
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/53f8b081c184328b82c8a7b5e70b8243b3cea8bd
Thank you!
--
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https://korg.wiki.kernel.org/userdoc/prtracker
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