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authorMiklos Szeredi <miklos@szeredi.hu>2009-04-14 13:48:41 -0400
committerJens Axboe <jens.axboe@oracle.com>2009-04-15 06:10:12 -0400
commit61e0d47c33cc371f725bcda4a47ae0efe652dba8 (patch)
treee00f99b506f1c1a16e3ba987e3390deda6bd2e03 /include/linux/fs.h
parentf8cc774ce4844811a55e2352f1443055e3994e28 (diff)
splice: add helpers for locking pipe inode
There are lots of sequences like this, especially in splice code: if (pipe->inode) mutex_lock(&pipe->inode->i_mutex); /* do something */ if (pipe->inode) mutex_unlock(&pipe->inode->i_mutex); so introduce helpers which do the conditional locking and unlocking. Also replace the inode_double_lock() call with a pipe_double_lock() helper to avoid spreading the use of this functionality beyond the pipe code. This patch is just a cleanup, and should cause no behavioral changes. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r--include/linux/fs.h3
1 files changed, 0 insertions, 3 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 907d8f56c6fa..e766be0d4329 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -797,9 +797,6 @@ enum inode_i_mutex_lock_class
797 I_MUTEX_QUOTA 797 I_MUTEX_QUOTA
798}; 798};
799 799
800extern void inode_double_lock(struct inode *inode1, struct inode *inode2);
801extern void inode_double_unlock(struct inode *inode1, struct inode *inode2);
802
803/* 800/*
804 * NOTE: in a 32bit arch with a preemptable kernel and 801 * NOTE: in a 32bit arch with a preemptable kernel and
805 * an UP compile the i_size_read/write must be atomic 802 * an UP compile the i_size_read/write must be atomic