[PATCH] x86_64: Remove CONFIG_CHECKING and add command line option for pagefault...

[linux-drm-fsl-dcu.git] / arch / x86_64 / mm / fault.c

diff --git a/arch/x86_64/mm/fault.c b/arch/x86_64/mm/fault.c
index b75b872ec154f8e004fc04a29375eb97f7f468bb..3a63707a698ba34d954770d5a5a7b3016ac53c03 100644 (file)
--- a/arch/x86_64/mm/fault.c
+++ b/arch/x86_64/mm/fault.c
@@ -308,18 +308,6 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
        unsigned long flags;
        siginfo_t info;
 
-#ifdef CONFIG_CHECKING
-       { 
-               unsigned long gs; 
-               struct x8664_pda *pda = cpu_pda + stack_smp_processor_id(); 
-               rdmsrl(MSR_GS_BASE, gs); 
-               if (gs != (unsigned long)pda) { 
-                       wrmsrl(MSR_GS_BASE, pda); 
-                       printk("page_fault: wrong gs %lx expected %p\n", gs, pda);
-               }
-       }
-#endif
-
        /* get the address */
        __asm__("movq %%cr2,%0":"=r" (address));
        if (notify_die(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
@@ -571,3 +559,10 @@ do_sigbus:
        force_sig_info(SIGBUS, &info, tsk);
        return;
 }
+
+static int __init enable_pagefaulttrace(char *str)
+{
+       page_fault_trace = 1;
+       return 0;
+}
+__setup("pagefaulttrace", enable_pagefaulttrace);