Loading arch/x86_64/kernel/entry.S +6 −1 Original line number Diff line number Diff line Loading @@ -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 /* Loading Loading
arch/x86_64/kernel/entry.S +6 −1 Original line number Diff line number Diff line Loading @@ -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 /* Loading
Andi Kleen <ak@suse.de>Andi Kleen <ak@suse.de>