From b05f0548dabd20433f8c201a0307103721d6a18b Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 20 Sep 2007 16:05:10 +0900 Subject: [PATCH] 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 Acked-by: Cornelia Huck Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/bin.c | 4 +--- 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 a819a7e8d74..e93fe5e2fa4 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 61a8c19df7c..73333dc6854 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); -- 2.11.4.GIT