PWN-Hunter/android_kernel_xiaomi_sdm845
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[PATCH] Fix a irqcount comment in entry.S

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Signed-off-by: Andi Kleen <ak@suse.de>
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Andi Kleen 2006-09-26 10:52:39 +02:00 committed by Andi Kleen
parent 4f7fd4d7a7
commit 96e540492a
1 changed files with 6 additions and 1 deletions
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7
arch/x86_64/kernel/entry.S
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@ -519,7 +519,12 @@ END(stub_rt_sigreturn)
testl $3,CS(%rdi)
je 1f
swapgs
1: incl %gs:pda_irqcount # RED-PEN should check preempt count
/* irqcount is used to check if a CPU is already on an interrupt
stack or not. While this is essentially redundant with preempt_count
it is a little cheaper to use a separate counter in the PDA
(short of moving irq_enter into assembly, which would be too
much work) */
1: incl %gs:pda_irqcount
cmoveq %gs:pda_irqstackptr,%rsp
push %rbp # backlink for old unwinder
/*