6.9-stable review patch. If anyone has any objections, please let me know.
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From: Joseph Qi joseph.qi@linux.alibaba.com
[ Upstream commit 30dd3478c3cd7d01cc5afc4952e885ba4eefb730 ]
If no bits are zero, ocfs2_find_next_zero_bit() will return max size, so check the return value with -1 is meaningless. Correct this usage and cleanup the code.
Link: https://lkml.kernel.org/r/20240314021713.240796-1-joseph.qi@linux.alibaba.co... Signed-off-by: Joseph Qi joseph.qi@linux.alibaba.com Reviewed-by: Heming Zhao heming.zhao@suse.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: Gang He ghe@suse.com Cc: Jun Piao piaojun@huawei.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Stable-dep-of: 28d2188709d9 ("selftests/harness: use 1024 in place of LINE_MAX") Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ocfs2/localalloc.c | 19 ++++++------------- fs/ocfs2/reservations.c | 2 +- fs/ocfs2/suballoc.c | 6 ++---- 3 files changed, 9 insertions(+), 18 deletions(-)
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c index c803c10dd97ef..33aeaaa056d70 100644 --- a/fs/ocfs2/localalloc.c +++ b/fs/ocfs2/localalloc.c @@ -863,14 +863,8 @@ static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb,
numfound = bitoff = startoff = 0; left = le32_to_cpu(alloc->id1.bitmap1.i_total); - while ((bitoff = ocfs2_find_next_zero_bit(bitmap, left, startoff)) != -1) { - if (bitoff == left) { - /* mlog(0, "bitoff (%d) == left", bitoff); */ - break; - } - /* mlog(0, "Found a zero: bitoff = %d, startoff = %d, " - "numfound = %d\n", bitoff, startoff, numfound);*/ - + while ((bitoff = ocfs2_find_next_zero_bit(bitmap, left, startoff)) < + left) { /* Ok, we found a zero bit... is it contig. or do we * start over?*/ if (bitoff == startoff) { @@ -976,9 +970,9 @@ static int ocfs2_sync_local_to_main(struct ocfs2_super *osb, start = count = 0; left = le32_to_cpu(alloc->id1.bitmap1.i_total);
- while ((bit_off = ocfs2_find_next_zero_bit(bitmap, left, start)) - != -1) { - if ((bit_off < left) && (bit_off == start)) { + while ((bit_off = ocfs2_find_next_zero_bit(bitmap, left, start)) < + left) { + if (bit_off == start) { count++; start++; continue; @@ -1002,8 +996,7 @@ static int ocfs2_sync_local_to_main(struct ocfs2_super *osb, goto bail; } } - if (bit_off >= left) - break; + count = 1; start = bit_off + 1; } diff --git a/fs/ocfs2/reservations.c b/fs/ocfs2/reservations.c index a9d1296d736dc..1fe61974d9f02 100644 --- a/fs/ocfs2/reservations.c +++ b/fs/ocfs2/reservations.c @@ -414,7 +414,7 @@ static int ocfs2_resmap_find_free_bits(struct ocfs2_reservation_map *resmap,
start = search_start; while ((offset = ocfs2_find_next_zero_bit(bitmap, resmap->m_bitmap_len, - start)) != -1) { + start)) < resmap->m_bitmap_len) { /* Search reached end of the region */ if (offset >= (search_start + search_len)) break; diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c index 166c8918c825a..961998415308d 100644 --- a/fs/ocfs2/suballoc.c +++ b/fs/ocfs2/suballoc.c @@ -1290,10 +1290,8 @@ static int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, found = start = best_offset = best_size = 0; bitmap = bg->bg_bitmap;
- while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { - if (offset == total_bits) - break; - + while ((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) < + total_bits) { if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { /* We found a zero, but we can't use it as it * hasn't been put to disk yet! */