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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 <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Alexander van Heukelum 2008-09-26 14:03:07 +02:00 committed by Ingo Molnar
parent a491503e4d
commit 69c89b5bf7
2 changed files with 0 additions and 26 deletions
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5
arch/x86/mm/fault.c
View File

@ -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);

21
include/asm-x86/irqflags.h
View File

@ -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