kprobes/x86: Remove unneeded arch_within_kprobe_blacklist from x86

Remove x86 specific arch_within_kprobe_blacklist().

Since we have already added all blacklisted symbols to the
kprobe blacklist by arch_populate_kprobe_blacklist(),
we don't need arch_within_kprobe_blacklist() on x86
anymore.

Tested-by: Andrea Righi <[e-mail]>
Signed-off-by: Masami Hiramatsu <[e-mail]>
Cc: Andy Lutomirski <[e-mail]>
Cc: Anil S Keshavamurthy <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: David S. Miller <[e-mail]>
Cc: Linus Torvalds <[e-mail]>
Cc: Naveen N. Rao <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Cc: Yonghong Song <[e-mail]>
Link: http://lkml.kernel.org/r/154503491354.26176.13903264647254766066.stgit@devbox
Signed-off-by: Ingo Molnar <[e-mail]>

arch/x86/kernel/kprobes/core.c

···
 }
 NOKPROBE_SYMBOL(kprobe_fault_handler);
 
-bool arch_within_kprobe_blacklist(unsigned long addr)
-{
-	return  (addr >= (unsigned long)__kprobes_text_start &&
-		 addr < (unsigned long)__kprobes_text_end) ||
-		(addr >= (unsigned long)__entry_text_start &&
-		 addr < (unsigned long)__entry_text_end);
-}
-
 int __init arch_populate_kprobe_blacklist(void)
 {
 	return kprobe_add_area_blacklist((unsigned long)__entry_text_start,