get rid of BKL in fs/minix

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/minix/bitmap.c

@@ -12,13 +12,14 @@
 /* bitmap.c contains the code that handles the inode and block bitmaps */
 
 #include "minix.h"
-#include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
 #include <linux/bitops.h>
 #include <linux/sched.h>
 
 static const int nibblemap[] = { 4,3,3,2,3,2,2,1,3,2,2,1,2,1,1,0 };
 
+static DEFINE_SPINLOCK(bitmap_lock);
+
 static unsigned long count_free(struct buffer_head *map[], unsigned numblocks, __u32 numbits)
 {
 	unsigned i, j, sum = 0;
@@ -69,11 +70,11 @@ void minix_free_block(struct inode *inode, unsigned long block)
 		return;
 	}
 	bh = sbi->s_zmap[zone];
-	lock_kernel();
+	spin_lock(&bitmap_lock);
 	if (!minix_test_and_clear_bit(bit, bh->b_data))
 		printk("minix_free_block (%s:%lu): bit already cleared\n",
 		       sb->s_id, block);
-	unlock_kernel();
+	spin_unlock(&bitmap_lock);
 	mark_buffer_dirty(bh);
 	return;
 }
@@ -88,18 +89,18 @@ int minix_new_block(struct inode * inode)
 		struct buffer_head *bh = sbi->s_zmap[i];
 		int j;
 
-		lock_kernel();
+		spin_lock(&bitmap_lock);
 		j = minix_find_first_zero_bit(bh->b_data, bits_per_zone);
 		if (j < bits_per_zone) {
 			minix_set_bit(j, bh->b_data);
-			unlock_kernel();
+			spin_unlock(&bitmap_lock);
 			mark_buffer_dirty(bh);
 			j += i * bits_per_zone + sbi->s_firstdatazone-1;
 			if (j < sbi->s_firstdatazone || j >= sbi->s_nzones)
 				break;
 			return j;
 		}
-		unlock_kernel();
+		spin_unlock(&bitmap_lock);
 	}
 	return 0;
 }
@@ -211,10 +212,10 @@ void minix_free_inode(struct inode * inode)
 	minix_clear_inode(inode);	/* clear on-disk copy */
 
 	bh = sbi->s_imap[ino];
-	lock_kernel();
+	spin_lock(&bitmap_lock);
 	if (!minix_test_and_clear_bit(bit, bh->b_data))
 		printk("minix_free_inode: bit %lu already cleared\n", bit);
-	unlock_kernel();
+	spin_unlock(&bitmap_lock);
 	mark_buffer_dirty(bh);
  out:
 	clear_inode(inode);		/* clear in-memory copy */
@@ -237,25 +238,25 @@ struct inode * minix_new_inode(const struct inode * dir, int * error)
 	j = bits_per_zone;
 	bh = NULL;
 	*error = -ENOSPC;
-	lock_kernel();
+	spin_lock(&bitmap_lock);
 	for (i = 0; i < sbi->s_imap_blocks; i++) {
 		bh = sbi->s_imap[i];
 		j = minix_find_first_zero_bit(bh->b_data, bits_per_zone);
 		if (j < bits_per_zone)
 			break;
 	}
 	if (!bh || j >= bits_per_zone) {
-		unlock_kernel();
+		spin_unlock(&bitmap_lock);
 		iput(inode);
 		return NULL;
 	}
 	if (minix_test_and_set_bit(j, bh->b_data)) {	/* shouldn't happen */
-		unlock_kernel();
+		spin_unlock(&bitmap_lock);
 		printk("minix_new_inode: bit already set\n");
 		iput(inode);
 		return NULL;
 	}
-	unlock_kernel();
+	spin_unlock(&bitmap_lock);
 	mark_buffer_dirty(bh);
 	j += i * bits_per_zone;
 	if (!j || j > sbi->s_ninodes) {

fs/minix/dir.c

@@ -11,7 +11,6 @@
 #include "minix.h"
 #include <linux/buffer_head.h>
 #include <linux/highmem.h>
-#include <linux/smp_lock.h>
 #include <linux/swap.h>
 
 typedef struct minix_dir_entry minix_dirent;
@@ -20,6 +19,7 @@ typedef struct minix3_dir_entry minix3_dirent;
 static int minix_readdir(struct file *, void *, filldir_t);
 
 const struct file_operations minix_dir_operations = {
+	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
 	.readdir	= minix_readdir,
 	.fsync		= simple_fsync,
@@ -102,8 +102,6 @@ static int minix_readdir(struct file * filp, void * dirent, filldir_t filldir)
 	char *name;
 	__u32 inumber;
 
-	lock_kernel();
-
 	pos = (pos + chunk_size-1) & ~(chunk_size-1);
 	if (pos >= inode->i_size)
 		goto done;
@@ -146,7 +144,6 @@ static int minix_readdir(struct file * filp, void * dirent, filldir_t filldir)
 
 done:
 	filp->f_pos = (n << PAGE_CACHE_SHIFT) | offset;
-	unlock_kernel();
 	return 0;
 }
 

fs/minix/inode.c

@@ -35,8 +35,6 @@ static void minix_put_super(struct super_block *sb)
 	int i;
 	struct minix_sb_info *sbi = minix_sb(sb);
 
-	lock_kernel();
-
 	if (!(sb->s_flags & MS_RDONLY)) {
 		if (sbi->s_version != MINIX_V3)	 /* s_state is now out from V3 sb */
 			sbi->s_ms->s_state = sbi->s_mount_state;
@@ -50,8 +48,6 @@ static void minix_put_super(struct super_block *sb)
 	kfree(sbi->s_imap);
 	sb->s_fs_info = NULL;
 	kfree(sbi);
-
-	unlock_kernel();
 }
 
 static struct kmem_cache * minix_inode_cachep;