BKL: remove BKL from freevxfs

All uses of the BKL in freevxfs 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 <[e-mail]>
Cc: Christoph Hellwig <[e-mail]>

fs/freevxfs/vxfs_lookup.c

···
 #include <linux/highmem.h>
 #include <linux/kernel.h>
 #include <linux/pagemap.h>
-#include <linux/smp_lock.h>
 
 #include "vxfs.h"
 #include "vxfs_dir.h"
···
 	if (dp->d_name.len > VXFS_NAMELEN)
 		return ERR_PTR(-ENAMETOOLONG);
 				 
-	lock_kernel();
 	ino = vxfs_inode_by_name(dip, dp);
 	if (ino) {
 		ip = vxfs_iget(dip->i_sb, ino);
-		if (IS_ERR(ip)) {
-			unlock_kernel();
+		if (IS_ERR(ip))
 			return ERR_CAST(ip);
-		}
 	}
-	unlock_kernel();
 	d_add(dp, ip);
 	return NULL;
 }
···
 	u_long			page, npages, block, pblocks, nblocks, offset;
 	loff_t			pos;
 
-	lock_kernel();
-
 	switch ((long)fp->f_pos) {
 	case 0:
 		if (filler(retp, ".", 1, fp->f_pos, ip->i_ino, DT_DIR) < 0)
···
 
 	pos = fp->f_pos - 2;
 	
-	if (pos > VXFS_DIRROUND(ip->i_size)) {
-		unlock_kernel();
+	if (pos > VXFS_DIRROUND(ip->i_size))
 		return 0;
-	}
 
 	npages = dir_pages(ip);
 	nblocks = dir_blocks(ip);
···
 done:
 	fp->f_pos = ((page << PAGE_CACHE_SHIFT) | offset) + 2;
 out:
-	unlock_kernel();
 	return 0;
 }

fs/freevxfs/vxfs_super.c

···
 #include <linux/buffer_head.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
-#include <linux/smp_lock.h>
 #include <linux/stat.h>
 #include <linux/vfs.h>
 #include <linux/mount.h>
···
 {
 	struct vxfs_sb_info	*infp = VXFS_SBI(sbp);
 
-	lock_kernel();
-
 	vxfs_put_fake_inode(infp->vsi_fship);
 	vxfs_put_fake_inode(infp->vsi_ilist);
 	vxfs_put_fake_inode(infp->vsi_stilist);
 
 	brelse(infp->vsi_bp);
 	kfree(infp);
-
-	unlock_kernel();
 }
 
 /**
···
 	struct inode *root;
 	int ret = -EINVAL;
 
-	lock_kernel();
-
 	sbp->s_flags |= MS_RDONLY;
 
 	infp = kzalloc(sizeof(*infp), GFP_KERNEL);
 	if (!infp) {
 		printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
-		unlock_kernel();
 		return -ENOMEM;
 	}
 
···
 		goto out_free_ilist;
 	}
 
-	unlock_kernel();
 	return 0;
 	
 out_free_ilist:
···
 out:
 	brelse(bp);
 	kfree(infp);
-	unlock_kernel();
 	return ret;
 }