* [PATCH] x86/kprobe: unbalanced preempt counter in kprobe_{fault,debug}_handler
@ 2018-01-15 4:28 Yang Bo
0 siblings, 0 replies; only message in thread
From: Yang Bo @ 2018-01-15 4:28 UTC (permalink / raw)
To: Thomas Gleixner
Cc: Ingo Molnar, H. Peter Anvin, x86, Masami Hiramatsu, Mark Rutland,
Andrew Morton, Laura Abbott, linux-kernel, Yang Bo
Don't see any preempt_disable() in do_debug() and do_page_fault(),
there is no need to call preempt_enable_no_resched() here.
Signed-off-by: Yang Bo <yangbo@deepin.com>
---
arch/x86/kernel/kprobes/core.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index 1ea5c9caa8f1..6f2c43e33674 100644
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -969,7 +969,6 @@ int kprobe_debug_handler(struct pt_regs *regs)
}
reset_current_kprobe();
out:
- preempt_enable_no_resched();
/*
* if somebody else is singlestepping across a probe point, flags
@@ -1017,7 +1016,6 @@ int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
restore_previous_kprobe(kcb);
else
reset_current_kprobe();
- preempt_enable_no_resched();
} else if (kcb->kprobe_status == KPROBE_HIT_ACTIVE ||
kcb->kprobe_status == KPROBE_HIT_SSDONE) {
/*
--
2.15.1
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2018-01-15 4:28 [PATCH] x86/kprobe: unbalanced preempt counter in kprobe_{fault,debug}_handler Yang Bo
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