block: use FIELD_SIZEOF to calculate size of a field

use FIELD_SIZEOF instead of open coding Signed-off-by: Maninder Singh <maninder1.s@samsung.com> Signed-off-by: Jens Axboe <axboe@fb.com>
git-mirror · Jul 7, 2015 · 0762b23 · 0762b23
1 parent bb8bd38
commit 0762b23
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/block/blk-core.c b/block/blk-core.c
@@ -3370,7 +3370,7 @@ EXPORT_SYMBOL(blk_post_runtime_resume);
 int __init blk_dev_init(void)
 {
 	BUILD_BUG_ON(__REQ_NR_BITS > 8 *
-			sizeof(((struct request *)0)->cmd_flags));
+			FIELD_SIZEOF(struct request, cmd_flags));
 
 	/* used for unplugging and affects IO latency/throughput - HIGHPRI */
 	kblockd_workqueue = alloc_workqueue("kblockd",