linux-kernel - [PATCH 01/11] perf: Push file_update_time() into perf_mmap

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Date:	Thu, 16 Feb 2012 14:46:09 +0100
From:	Jan Kara <jack@...e.cz>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Eric Sandeen <sandeen@...hat.com>,
	Dave Chinner <david@...morbit.com>, Jan Kara <jack@...e.cz>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: [PATCH 01/11] perf: Push file_update_time() into perf_mmap_fault()

CC: Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC: Ingo Molnar <mingo@...e.hu>
CC: Paul Mackerras <paulus@...ba.org>
CC: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Signed-off-by: Jan Kara <jack@...e.cz>
---
 kernel/events/core.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index ba36013..61a67f3 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3316,8 +3316,10 @@ static int perf_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 	int ret = VM_FAULT_SIGBUS;
 
 	if (vmf->flags & FAULT_FLAG_MKWRITE) {
-		if (vmf->pgoff == 0)
+		if (vmf->pgoff == 0) {
 			ret = 0;
+			file_update_time(vma->vm_file);
+		}
 		return ret;
 	}
 
-- 
1.7.1

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