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x86: remove page_fault_trace 

Old debugging code that is not really needed anymore. If someone
wants it it would be better replaced with a systemtap script or
kprobe.

This avoids a potential cache miss during page fault processing.

[ mingo: arch/x86 adaptation ]

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Andi Kleen 2007-10-19 20:35:02 +02:00 committed by Thomas Gleixner
parent 096708dcf7
commit af93ebc0b3
1 changed files with 0 additions and 12 deletions
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12
arch/x86/mm/fault_64.c
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@ -285,7 +285,6 @@ static int vmalloc_fault(unsigned long address)
return 0;
}
static int page_fault_trace;
int show_unhandled_signals = 1;
/*
@ -354,10 +353,6 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
if (likely(regs->eflags & X86_EFLAGS_IF))
local_irq_enable();
if (unlikely(page_fault_trace))
printk("pagefault rip:%lx rsp:%lx cs:%lu ss:%lu address %lx error %lx\n",
regs->rip,regs->rsp,regs->cs,regs->ss,address,error_code);
if (unlikely(error_code & PF_RSVD))
pgtable_bad(address, regs, error_code);
@ -621,10 +616,3 @@ void vmalloc_sync_all(void)
BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) ==
(__START_KERNEL & PGDIR_MASK)));
}
static int __init enable_pagefaulttrace(char *str)
{
page_fault_trace = 1;
return 1;
}
__setup("pagefaulttrace", enable_pagefaulttrace);