[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20070714195649.GO6975@Krystal>
Date: Sat, 14 Jul 2007 15:56:49 -0400
From: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Cc: prasanna@...ibm.com, ananth@...ibm.com,
anil.s.keshavamurthy@...el.com, davem@...emloft.net,
hch@...radead.org
Subject: [PATCH] Kprobes - no kprobes_mutex needed around arch_remove_kprobe calls
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@...ymtl.ca>
CC: hch@...radead.org
CC: prasanna@...ibm.com
CC: ananth@...ibm.com
CC: anil.s.keshavamurthy@...el.com
CC: davem@...emloft.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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists