Make FAT users happier by not deadlocking
The FAT BKL removal patch can cause deadlocks. It turns out that the new
lock_super() calls are unneeded, remove them (as directed by Linus).
Reported-by: "Tony Luck" <tony.luck@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 7059928..bdf91e9 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -11,7 +11,6 @@
#include <linux/mount.h>
#include <linux/time.h>
#include <linux/msdos_fs.h>
-#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
#include <linux/writeback.h>
#include <linux/backing-dev.h>
@@ -229,8 +228,7 @@
void fat_truncate(struct inode *inode)
{
- struct super_block *sb = inode->i_sb;
- struct msdos_sb_info *sbi = MSDOS_SB(sb);
+ struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
const unsigned int cluster_size = sbi->cluster_size;
int nr_clusters;
@@ -243,9 +241,7 @@
nr_clusters = (inode->i_size + (cluster_size - 1)) >> sbi->cluster_bits;
- lock_super(sb);
fat_free(inode, nr_clusters);
- unlock_super(sb);
fat_flush_inodes(inode->i_sb, inode, NULL);
}
@@ -298,14 +294,11 @@
int fat_setattr(struct dentry *dentry, struct iattr *attr)
{
- struct super_block *sb = dentry->d_sb;
struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
struct inode *inode = dentry->d_inode;
int mask, error = 0;
unsigned int ia_valid;
- lock_super(sb);
-
/*
* Expand the file. Since inode_setattr() updates ->i_size
* before calling the ->truncate(), but FAT needs to fill the
@@ -358,7 +351,6 @@
mask = sbi->options.fs_fmask;
inode->i_mode &= S_IFMT | (S_IRWXUGO & ~mask);
out:
- unlock_super(sb);
return error;
}
EXPORT_SYMBOL_GPL(fat_setattr);