linux-kernel - [PATCH 1/8] sysfs: notify file on deactivation

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Date:	Thu, 20 Sep 2007 17:31:37 +0900
From:	Tejun Heo <htejun@...il.com>
To:	ebiederm@...ssion.com, cornelia.huck@...ibm.com, greg@...ah.com,
	stern@...land.harvard.edu, kay.sievers@...y.org,
	linux-kernel@...r.kernel.org, htejun@...il.com
Cc:	Tejun Heo <htejun@...il.com>
Subject: [PATCH 1/8] sysfs: notify file on deactivation

Notify file on deactivation so that the pollers get event when the
polled file dies, which is very easy to implement with sd based
interface.

Signed-off-by: Tejun Heo <htejun@...il.com>
---
 fs/sysfs/dir.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index a74ca4a..d50d3ac 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -245,6 +245,10 @@ static void sysfs_deactivate(struct sysfs_dirent *sd)
 	 */
 	v = atomic_add_return(SD_DEACTIVATED_BIAS, &sd->s_active);
 
+	/* file is dying, notify pollers */
+	if (sysfs_type(sd) == SYSFS_FILE)
+		sysfs_notify_file(sd);
+
 	if (v != SD_DEACTIVATED_BIAS)
 		wait_for_completion(&wait);
 
-- 
1.5.0.3


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