From 046755a28f9ddc95fd153e76e62d4b3205ac79cd Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Mon, 3 Feb 2020 17:34:52 -0800 Subject: [PATCH] drivers/block/null_blk_main.c: fix uninitialized var warnings MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit With gcc-7.2, many instances of drivers/block/null_blk_main.c: In function ‘nullb_device_zone_nr_conv_store’: drivers/block/null_blk_main.c:291:12: warning: ‘new_value’ may be used uninitialized in this function [-Wmaybe-uninitialized] dev->NAME = new_value; \ ^ drivers/block/null_blk_main.c:279:7: note: ‘new_value’ was declared here TYPE new_value; \ ^ Presumably notabug, so use uninitialized_var() to suppress them. Cc: Shaohua Li Cc: Jens Axboe Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/block/null_blk_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index 9ce75f171f8b..16510795e377 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -276,7 +276,7 @@ nullb_device_##NAME##_store(struct config_item *item, const char *page, \ { \ int (*apply_fn)(struct nullb_device *dev, TYPE new_value) = APPLY;\ struct nullb_device *dev = to_nullb_device(item); \ - TYPE new_value; \ + TYPE uninitialized_var(new_value); \ int ret; \ \ ret = nullb_device_##TYPE##_attr_store(&new_value, page, count);\