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x86, mm, kprobes: fault.c, simplify notify_page_fault()

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Impact: cleanup

Remove an #ifdef from notify_page_fault(). The function still
compiles to nothing in the !CONFIG_KPROBES case.

Introduce kprobes_built_in() and kprobe_fault_handler() helpers
to allow this - they returns 0 if !CONFIG_KPROBES.

No code changed:

   text	   data	    bss	    dec	    hex	filename
   4618	     32	     24	   4674	   1242	fault.o.before
   4618	     32	     24	   4674	   1242	fault.o.after

Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
2009-02-20 22:42:57 +01:00
parent b814d41f09
commit b18018126f
2 changed files with 20 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/x86/mm/fault.c
View File

@@ -68,11 +68,10 @@ static inline int kmmio_fault(struct pt_regs *regs, unsigned long addr)
static inline int notify_page_fault(struct pt_regs *regs)
{
#ifdef CONFIG_KPROBES
int ret = 0;
/* kprobe_running() needs smp_processor_id() */
if (!user_mode_vm(regs)) {
if (kprobes_built_in() && !user_mode_vm(regs)) {
preempt_disable();
if (kprobe_running() && kprobe_fault_handler(regs, 14))
ret = 1;
@@ -80,9 +79,6 @@ static inline int notify_page_fault(struct pt_regs *regs)
}
return ret;
#else
return 0;
#endif
}
/*