[PATCH] Sprinkle some might_sleep() checks into the code.

[Jan Kara]

Signed-off-by: Jan Kara <jack@xxxxxxx>
---
 fs/ext4/mballoc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index a41e3ba8cfaa..8b6bdb975e10 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4757,6 +4757,7 @@ do_more:
 	if (err)
 		goto error_return;
 
+	might_sleep();
 	if ((flags & EXT4_FREE_BLOCKS_METADATA) && ext4_handle_valid(handle)) {
 		struct ext4_free_data *new_entry;
 		/*
@@ -4764,6 +4765,7 @@ do_more:
 		 * be used until this transaction is committed
 		 */
 	retry:
+		might_sleep();
 		new_entry = kmem_cache_alloc(ext4_free_data_cachep, GFP_NOFS);
 		if (!new_entry) {
 			/*
@@ -4779,6 +4781,7 @@ do_more:
 		new_entry->efd_count = count_clusters;
 		new_entry->efd_tid = handle->h_transaction->t_tid;
 
+		might_sleep();
 		ext4_lock_group(sb, block_group);
 		mb_clear_bits(bitmap_bh->b_data, bit, count_clusters);
 		ext4_mb_free_metadata(handle, &e4b, new_entry);
@@ -4796,7 +4799,7 @@ do_more:
 					 err);
 		}
 
-
+		might_sleep();
 		ext4_lock_group(sb, block_group);
 		mb_clear_bits(bitmap_bh->b_data, bit, count_clusters);
 		mb_free_blocks(inode, &e4b, bit, count_clusters);
@@ -4807,6 +4810,7 @@ do_more:
 	ext4_block_bitmap_csum_set(sb, block_group, gdp, bitmap_bh);
 	ext4_group_desc_csum_set(sb, block_group, gdp);
 	ext4_unlock_group(sb, block_group);
+	might_sleep();
 
 	if (sbi->s_log_groups_per_flex) {
 		ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
-- 
1.8.1.4


--CE+1k2dSO48ffgeK--
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