[PATCH 3.4 085/214] VFS: make vfs_fstat() use f[get|put]_light()

Greg Kroah-Hartman
2014-06-05T04:57:40Z

From: Linus Torvalds <torvalds@linux-foundation.org>

commit e994defb7b6813ba6fa7a2a36e86d2455ad1dc35 upstream.

Use the *_light() versions that properly avoid doing the file user count
updates when they are unnecessary.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[xr: Backported to 3.4: adjust function name]
Signed-off-by: Rui Xiang <rui.xiang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/stat.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

--- a/fs/stat.c
+++ b/fs/stat.c
@@ -57,12 +57,13 @@ EXPORT_SYMBOL(vfs_getattr);

int vfs_fstat(unsigned int fd, struct kstat *stat)
{
- struct file *f = fget_raw(fd);
+ int fput_needed;
+ struct file *f = fget_light(fd, &fput_needed);
int error = -EBADF;

if (f) {
error = vfs_getattr(f->f_path.mnt, f->f_path.dentry, stat);
- fput(f);
+ fput_light(f, fput_needed);
}
return error;
}