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| author | Tejun Heo <htejun@gmail.com> | 2007-09-20 16:05:10 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-10-12 14:51:10 -0700 |
| commit | b05f0548dabd20433f8c201a0307103721d6a18b (patch) | |
| tree | 1dd741ce7ee0a05f20b4b1469f03b378c8ee9ed1 | |
| parent | b13dc89c5a5bd5e34aadb44c0fb7e870959dcd06 (diff) | |
| download | linux-b05f0548dabd20433f8c201a0307103721d6a18b.tar.gz linux-b05f0548dabd20433f8c201a0307103721d6a18b.tar.bz2 linux-b05f0548dabd20433f8c201a0307103721d6a18b.zip | |
sysfs: kill unnecessary sysfs_get() in open paths
There's no reason to get an extra reference to sysfs_dirent for an
open file. Open file has a reference to the dentry which in turn has
a reference to sysfs_dirent. This is fairly obvious as otherwise open
itself won't be able to access the sysfs_dirent. Kill the extra
sysfs_get() and matching sysfs_put().
Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/sysfs/bin.c | 4 | ||||
| -rw-r--r-- | fs/sysfs/file.c | 6 |
2 files changed, 2 insertions, 8 deletions
diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c index a819a7e8d74d..e93fe5e2fa41 100644 --- a/fs/sysfs/bin.c +++ b/fs/sysfs/bin.c @@ -193,9 +193,8 @@ static int open(struct inode * inode, struct file * file) mutex_init(&bb->mutex); file->private_data = bb; - /* open succeeded, put active reference and pin attr_sd */ + /* open succeeded, put active reference */ sysfs_put_active(attr_sd); - sysfs_get(attr_sd); return 0; err_out: @@ -211,7 +210,6 @@ static int release(struct inode * inode, struct file * file) if (bb->mmapped) sysfs_put_active_two(attr_sd); - sysfs_put(attr_sd); kfree(bb->buffer); kfree(bb); return 0; diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index 61a8c19df7c3..73333dc68545 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -298,9 +298,8 @@ static int sysfs_open_file(struct inode *inode, struct file *file) buffer->ops = ops; file->private_data = buffer; - /* open succeeded, put active references and pin attr_sd */ + /* open succeeded, put active references */ sysfs_put_active_two(attr_sd); - sysfs_get(attr_sd); return 0; err_out: @@ -310,11 +309,8 @@ static int sysfs_open_file(struct inode *inode, struct file *file) static int sysfs_release(struct inode * inode, struct file * filp) { - struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata; struct sysfs_buffer *buffer = filp->private_data; - sysfs_put(attr_sd); - if (buffer) { if (buffer->page) free_page((unsigned long)buffer->page); |