ocfs2: revert "ocfs2: fix the la space leak when unmounting an ocfs2 volume"

Patch series "Revert ocfs2 commit dfe6c56 and provide a new fix".

SUSE QA team detected a mistake in my commit dfe6c56 ("ocfs2: fix the
la space leak when unmounting an ocfs2 volume").  I am very sorry for my
error.  (If my eyes are correct) From the mailling list mails, this patch
shouldn't be applied to 4.19 5.4 5.10 5.15 6.1 6.6, and these branches
should perform a revert operation.

Reason for revert:
In commit dfe6c56, I mistakenly wrote: "This bug has existed since
the initial OCFS2 code.".  The statement is wrong.  The correct
introduction commit is 30dd347.  IOW, if the branch doesn't include
30dd347, dfe6c56 should also not be included.


This reverts commit dfe6c56 ("ocfs2: fix the la space leak when
unmounting an ocfs2 volume").

In commit dfe6c56, the commit log "This bug has existed since the
initial OCFS2 code." is wrong.  The correct introduction commit is
30dd347 ("ocfs2: correctly use ocfs2_find_next_zero_bit()").

The influence of commit dfe6c56 is that it provides a correct fix for
the latest kernel.  however, it shouldn't be pushed to stable branches. 
Let's use this commit to revert all branches that include dfe6c56 and
use a new fix method to fix commit 30dd347.

Link: https://lkml.kernel.org/r/20241205104835.18223-1-heming.zhao@suse.com
Link: https://lkml.kernel.org/r/20241205104835.18223-2-heming.zhao@suse.com
Fixes: dfe6c56 ("ocfs2: fix the la space leak when unmounting an ocfs2 volume")
Signed-off-by: Heming Zhao <heming.zhao@suse.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: zhaohem

fs/ocfs2/localalloc.c

@@ -1002,25 +1002,6 @@ static int ocfs2_sync_local_to_main(struct ocfs2_super *osb,
 		start = bit_off + 1;
 	}
 
-	/* clear the contiguous bits until the end boundary */
-	if (count) {
-		blkno = la_start_blk +
-			ocfs2_clusters_to_blocks(osb->sb,
-					start - count);
-
-		trace_ocfs2_sync_local_to_main_free(
-				count, start - count,
-				(unsigned long long)la_start_blk,
-				(unsigned long long)blkno);
-
-		status = ocfs2_release_clusters(handle,
-				main_bm_inode,
-				main_bm_bh, blkno,
-				count);
-		if (status < 0)
-			mlog_errno(status);
-	}
-
 bail:
 	if (status)
 		mlog_errno(status);