BKL: remove BKL from qnx4

All uses of the BKL in qnx4 were the result of a pushdown into
code that doesn't really need it. As Christoph points out, this
is a read-only file system, which eliminates most of the races in
readdir/lookup.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Anders Larsen <al@alarsen.net>
Cc: Christoph Hellwig <hch@infradead.org>

3 files changed, 1 insertions, 21 deletions

diff --git a/fs/qnx4/dir.c b/fs/qnx4/dir.c
index 6e8fc62b40a8..7b0329468a5d 100644
--- a/fs/qnx4/dir.c
+++ b/fs/qnx4/dir.c
@@ -11,7 +11,6 @@
  * 20-06-1998 by Frank Denis : Linux 2.1.99+ & dcache support.
  */
 
-#include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
 #include "qnx4.h"
 
@@ -29,8 +28,6 @@ static int qnx4_readdir(struct file *filp, void *dirent, filldir_t filldir)
         QNX4DEBUG((KERN_INFO "qnx4_readdir:i_size = %ld\n", (long) inode->i_size));
         QNX4DEBUG((KERN_INFO "filp->f_pos         = %ld\n", (long) filp->f_pos));
 
-        lock_kernel();
-
         while (filp->f_pos < inode->i_size) {
                 blknum = qnx4_block_map( inode, filp->f_pos >> QNX4_BLOCK_SIZE_BITS );
                 bh = sb_bread(inode->i_sb, blknum);
@@ -71,7 +68,6 @@ static int qnx4_readdir(struct file *filp, void *dirent, filldir_t filldir)
                 brelse(bh);
         }
 out:
-        unlock_kernel();
         return 0;
 }
 
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index 86a7be1399a8..01bad30026fc 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -16,7 +16,6 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/highuid.h>
-#include <linux/smp_lock.h>
 #include <linux/pagemap.h>
 #include <linux/buffer_head.h>
 #include <linux/writeback.h>
@@ -157,8 +156,6 @@ static int qnx4_statfs(struct dentry *dentry, struct kstatfs *buf)
         struct super_block *sb = dentry->d_sb;
         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
 
-        lock_kernel();
-
         buf->f_type    = sb->s_magic;
         buf->f_bsize   = sb->s_blocksize;
         buf->f_blocks  = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size) * 8;
@@ -168,8 +165,6 @@ static int qnx4_statfs(struct dentry *dentry, struct kstatfs *buf)
         buf->f_fsid.val[0] = (u32)id;
         buf->f_fsid.val[1] = (u32)(id >> 32);
 
-        unlock_kernel();
-
         return 0;
 }
 
@@ -234,13 +229,9 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
         struct qnx4_sb_info *qs;
         int ret = -EINVAL;
 
-        lock_kernel();
-
         qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
-        if (!qs) {
-                unlock_kernel();
+        if (!qs)
                 return -ENOMEM;
-        }
         s->s_fs_info = qs;
 
         sb_set_blocksize(s, QNX4_BLOCK_SIZE);
@@ -287,8 +278,6 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
                 goto outi;
 
         brelse(bh);
-
-        unlock_kernel();
         return 0;
 
       outi:
@@ -298,7 +287,6 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
       outnobh:
         kfree(qs);
         s->s_fs_info = NULL;
-        unlock_kernel();
         return ret;
 }
 
diff --git a/fs/qnx4/namei.c b/fs/qnx4/namei.c
index 58703ebba879..275327b5615e 100644
--- a/fs/qnx4/namei.c
+++ b/fs/qnx4/namei.c
@@ -12,7 +12,6 @@
  * 04-07-1998 by Frank Denis : first step for rmdir/unlink.
  */
 
-#include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
 #include "qnx4.h"
 
@@ -109,7 +108,6 @@ struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nam
         int len = dentry->d_name.len;
         struct inode *foundinode = NULL;
 
-        lock_kernel();
         if (!(bh = qnx4_find_entry(len, dir, name, &de, &ino)))
                 goto out;
         /* The entry is linked, let's get the real info */
@@ -123,13 +121,11 @@ struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nam
 
         foundinode = qnx4_iget(dir->i_sb, ino);
         if (IS_ERR(foundinode)) {
-                unlock_kernel();
                 QNX4DEBUG((KERN_ERR "qnx4: lookup->iget -> error %ld\n",
                            PTR_ERR(foundinode)));
                 return ERR_CAST(foundinode);
         }
 out:
-        unlock_kernel();
         d_add(dentry, foundinode);
 
         return NULL;