ext4: Fix spinlock assertions on UP systems

On UP systems without DEBUG_SPINLOCK, ext4_is_group_locked always fails
which triggers a BUG_ON() call.
This patch fixes it by using assert_spin_locked instead.

Signed-off-by: Vincent Minet <vincent@vincent-minet.net>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 149e02d..89190ae 100644 (file)
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1583,12 +1583,6 @@ static inline void ext4_unlock_group(struct super_block *sb,
        spin_unlock(ext4_group_lock_ptr(sb, group));
 }
 
-static inline int ext4_is_group_locked(struct super_block *sb,
-                                       ext4_group_t group)
-{
-       return spin_is_locked(ext4_group_lock_ptr(sb, group));
-}
-
 /*
  * Inodes and files operations
  */

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index e76459c..541bd9a 100644 (file)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -436,7 +436,7 @@ static void mb_free_blocks_double(struct inode *inode, struct ext4_buddy *e4b,
 
        if (unlikely(e4b->bd_info->bb_bitmap == NULL))
                return;
-       BUG_ON(!ext4_is_group_locked(sb, e4b->bd_group));
+       assert_spin_locked(ext4_group_lock_ptr(sb, e4b->bd_group));
        for (i = 0; i < count; i++) {
                if (!mb_test_bit(first + i, e4b->bd_info->bb_bitmap)) {
                        ext4_fsblk_t blocknr;
@@ -460,7 +460,7 @@ static void mb_mark_used_double(struct ext4_buddy *e4b, int first, int count)
 
        if (unlikely(e4b->bd_info->bb_bitmap == NULL))
                return;
-       BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group));
+       assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group));
        for (i = 0; i < count; i++) {
                BUG_ON(mb_test_bit(first + i, e4b->bd_info->bb_bitmap));
                mb_set_bit(first + i, e4b->bd_info->bb_bitmap);
@@ -1115,7 +1115,7 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b,
        struct super_block *sb = e4b->bd_sb;
 
        BUG_ON(first + count > (sb->s_blocksize << 3));
-       BUG_ON(!ext4_is_group_locked(sb, e4b->bd_group));
+       assert_spin_locked(ext4_group_lock_ptr(sb, e4b->bd_group));
        mb_check_buddy(e4b);
        mb_free_blocks_double(inode, e4b, first, count);
 
@@ -1196,7 +1196,7 @@ static int mb_find_extent(struct ext4_buddy *e4b, int order, int block,
        int ord;
        void *buddy;
 
-       BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group));
+       assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group));
        BUG_ON(ex == NULL);
 
        buddy = mb_find_buddy(e4b, order, &max);
@@ -1260,7 +1260,7 @@ static int mb_mark_used(struct ext4_buddy *e4b, struct ext4_free_extent *ex)
 
        BUG_ON(start + len > (e4b->bd_sb->s_blocksize << 3));
        BUG_ON(e4b->bd_group != ex->fe_group);
-       BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group));
+       assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group));
        mb_check_buddy(e4b);
        mb_mark_used_double(e4b, start, len);