1 files changed, 7 insertions, 5 deletions

diff --git a/fs/fat/file.c b/fs/fat/file.c
index 27cc1164ec36..7059928fb351 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -229,7 +229,8 @@ static int fat_free(struct inode *inode, int skip)
 
 void fat_truncate(struct inode *inode)
 {
-        struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
+        struct super_block *sb = inode->i_sb;
+        struct msdos_sb_info *sbi = MSDOS_SB(sb);
         const unsigned int cluster_size = sbi->cluster_size;
         int nr_clusters;
 
@@ -242,9 +243,9 @@ void fat_truncate(struct inode *inode)
 
         nr_clusters = (inode->i_size + (cluster_size - 1)) >> sbi->cluster_bits;
 
-        lock_kernel();
+        lock_super(sb);
         fat_free(inode, nr_clusters);
-        unlock_kernel();
+        unlock_super(sb);
         fat_flush_inodes(inode->i_sb, inode, NULL);
 }
 
@@ -297,12 +298,13 @@ static int fat_allow_set_time(struct msdos_sb_info *sbi, struct inode *inode)
 
 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_kernel();
+        lock_super(sb);
 
         /*
          * Expand the file. Since inode_setattr() updates ->i_size
@@ -356,7 +358,7 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr)
                 mask = sbi->options.fs_fmask;
         inode->i_mode &= S_IFMT | (S_IRWXUGO & ~mask);
 out:
-        unlock_kernel();
+        unlock_super(sb);
         return error;
 }
 EXPORT_SYMBOL_GPL(fat_setattr);