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Date: Sun, 4 Apr 2010 16:36:43 +0200
From: Frederic Weisbecker <fweisbec@...il.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: LKML <linux-kernel@...r.kernel.org>,
Arnd Bergmann <arnd@...ay.de.ibm.com>,
Arnd Bergmann <arnd@...db.de>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
Frederic Weisbecker <fweisbec@...il.com>
Subject: [PATCH 3/4] perf_event: Make perf fd non seekable
From: Arnd Bergmann <arnd@...ay.de.ibm.com>
Perf_event does not need seeking, so prevent it in order to
get rid of default_llseek, which uses the BKL.
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Ingo Molnar <mingo@...e.hu>
[drop the nonseekable_open, not needed for anon inodes]
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
kernel/perf_event.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 63fbce1..4aa50ff 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -2645,6 +2645,7 @@ static int perf_fasync(int fd, struct file *filp, int on)
}
static const struct file_operations perf_fops = {
+ .llseek = no_llseek,
.release = perf_release,
.read = perf_read,
.poll = perf_poll,
--
1.6.2.3
--
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