[PATCH] Kprobes - no kprobes_mutex needed around arch_remove_kprobe calls

[Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>]

Kprobes - no kprobes_mutex needed around arch_remove_kprobe calls.

Since we have the new insn pages mutex, there is no need to protect
arch_remove_kprobe() with the kprobes_mutex anymore. We don't edit the
kernel text there neither, so don't take the text edit lock.

This patch applies after
text-edit-lock-kprobes-architecture-independent.patch

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: hch@infradead.org
CC: prasanna@in.ibm.com
CC: ananth@in.ibm.com
CC: anil.s.keshavamurthy@intel.com
CC: davem@davemloft.net
---
 kernel/kprobes.c |    4 ----
 1 file changed, 4 deletions(-)

Index: linux-2.6-lttng/kernel/kprobes.c
===================================================================
--- linux-2.6-lttng.orig/kernel/kprobes.c	2007-07-14 15:44:57.000000000 -0400
+++ linux-2.6-lttng/kernel/kprobes.c	2007-07-14 15:45:49.000000000 -0400
@@ -663,11 +663,7 @@ valid_p:
 			list_del_rcu(&p->list);
 			kfree(old_p);
 		}
-		mutex_lock(&kprobe_mutex);
-		kernel_text_lock();
 		arch_remove_kprobe(p);
-		kernel_text_unlock();
-		mutex_unlock(&kprobe_mutex);
 	} else {
 		mutex_lock(&kprobe_mutex);
 		if (p->break_handler)

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68