Nadav reported that since the this_cpu_*() ops got asm-volatile constraints on, code generation suffered for do_IRQ(), but since this is all with IRQs disabled we can use __this_cpu_*().
Reported-by: Nadav Amit <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> --- arch/x86/include/asm/irq_regs.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/x86/include/asm/irq_regs.h +++ b/arch/x86/include/asm/irq_regs.h @@ -16,7 +16,7 @@ DECLARE_PER_CPU(struct pt_regs *, irq_re static inline struct pt_regs *get_irq_regs(void) { - return this_cpu_read(irq_regs); + return __this_cpu_read(irq_regs); } static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs) @@ -24,7 +24,7 @@ static inline struct pt_regs *set_irq_re struct pt_regs *old_regs; old_regs = get_irq_regs(); - this_cpu_write(irq_regs, new_regs); + __this_cpu_write(irq_regs, new_regs); return old_regs; }
