From 69c89b5bf7f253756f3056e84b8603abe1c50f5b Mon Sep 17 00:00:00 2001 From: Alexander van Heukelum Date: Fri, 26 Sep 2008 14:03:07 +0200 Subject: [PATCH] traps: x86: remove trace_hardirqs_fixup from pagefault handler The last use of trace_hardirqs_fixup is unnecessary, because the trap is taken with interrupt off on i386 as well as x86_64, and the irq-tracer is notified of this from the assembly code. trace_hardirqs_fixup and trace_hardirqs_fixup_flags are removed from include/asm-x86/irqflags.h as they are no longer used. Signed-off-by: Alexander van Heukelum Signed-off-by: Ingo Molnar --- arch/x86/mm/fault.c | 5 ----- include/asm-x86/irqflags.h | 21 --------------------- 2 files changed, 26 deletions(-) diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index a742d75..3f2b896 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -592,11 +592,6 @@ void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code) unsigned long flags; #endif - /* - * We can fault from pretty much anywhere, with unknown IRQ state. - */ - trace_hardirqs_fixup(); - tsk = current; mm = tsk->mm; prefetchw(&mm->mmap_sem); diff --git a/include/asm-x86/irqflags.h b/include/asm-x86/irqflags.h index 424acb4..2bdab21 100644 --- a/include/asm-x86/irqflags.h +++ b/include/asm-x86/irqflags.h @@ -166,27 +166,6 @@ static inline int raw_irqs_disabled(void) return raw_irqs_disabled_flags(flags); } -/* - * makes the traced hardirq state match with the machine state - * - * should be a rarely used function, only in places where its - * otherwise impossible to know the irq state, like in traps. - */ -static inline void trace_hardirqs_fixup_flags(unsigned long flags) -{ - if (raw_irqs_disabled_flags(flags)) - trace_hardirqs_off(); - else - trace_hardirqs_on(); -} - -static inline void trace_hardirqs_fixup(void) -{ - unsigned long flags = __raw_local_save_flags(); - - trace_hardirqs_fixup_flags(flags); -} - #else #ifdef CONFIG_X86_64 -- 2.7.4