From 129415607845d4daea11ddcba706005c69dcb942 Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Tue, 6 Jan 2009 14:41:50 -0800
Subject: kprobes: add kprobe_insn_mutex and cleanup arch_remove_kprobe()

Add kprobe_insn_mutex for protecting kprobe_insn_pages hlist, and remove
kprobe_mutex from architecture dependent code.

This allows us to call arch_remove_kprobe() (and free_insn_slot) while
holding kprobe_mutex.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/arm/kernel/kprobes.c | 2 --
 1 file changed, 2 deletions(-)

(limited to 'arch/arm/kernel/kprobes.c')

diff --git a/arch/arm/kernel/kprobes.c b/arch/arm/kernel/kprobes.c
index 3f9abe0e9af..f692efddd44 100644
--- a/arch/arm/kernel/kprobes.c
+++ b/arch/arm/kernel/kprobes.c
@@ -92,9 +92,7 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
 void __kprobes arch_remove_kprobe(struct kprobe *p)
 {
 	if (p->ainsn.insn) {
-		mutex_lock(&kprobe_mutex);
 		free_insn_slot(p->ainsn.insn, 0);
-		mutex_unlock(&kprobe_mutex);
 		p->ainsn.insn = NULL;
 	}
 }
-- 
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