ext4: remove call to ext4_group_desc() in ext4_group_used_meta_blocks()
The static function ext4_group_used_meta_blocks() only has one caller,
who already has access to the block group's group descriptor. So it's
better to have ext4_init_block_bitmap() pass the group descriptor to
ext4_group_used_meta_blocks(), so it doesn't need to call
ext4_group_desc(). Previously this function did not check if
ext4_group_desc() returned NULL due to an error, potentially causing a
kernel OOPS report. This avoids the issue entirely.
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 38f40d5..b37b128 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -55,7 +55,8 @@
}
static int ext4_group_used_meta_blocks(struct super_block *sb,
- ext4_group_t block_group)
+ ext4_group_t block_group,
+ struct ext4_group_desc *gdp)
{
ext4_fsblk_t tmp;
struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -63,10 +64,6 @@
int used_blocks = sbi->s_itb_per_group + 2;
if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
- struct ext4_group_desc *gdp;
- struct buffer_head *bh;
-
- gdp = ext4_get_group_desc(sb, block_group, &bh);
if (!ext4_block_in_group(sb, ext4_block_bitmap(sb, gdp),
block_group))
used_blocks--;
@@ -177,7 +174,7 @@
*/
mark_bitmap_end(group_blocks, sb->s_blocksize * 8, bh->b_data);
}
- return free_blocks - ext4_group_used_meta_blocks(sb, block_group);
+ return free_blocks - ext4_group_used_meta_blocks(sb, block_group, gdp);
}