On 03/22/2012 08:35 AM, Linus Walleij wrote:
I'm pretty tired of seeing these in my kernel compiles:
drivers/mmc/card/block.c: In function ‘mmc_blk_issue_secdiscard_rq’:
drivers/mmc/card/block.c:911:18: warning: ‘arg’ may be used uninitialized in this function [-Wuninitialized]
drivers/mmc/card/block.c:910:6: warning: ‘nr’ may be used uninitialized in this function [-Wuninitialized]
drivers/mmc/card/block.c:910:6: warning: ‘from’ may be used uninitialized in this function [-Wuninitialized]
This patch marks the variables explicitly uninitialized as
seems to be the intention, I can assure myself they are not
actually uninitialized at use time by just reading the code.
Signed-off-by: Linus Walleij<linus.walleij@xxxxxxxxxx>
---
drivers/mmc/card/block.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index c6a383d..214ae68 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -874,7 +874,9 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
{
struct mmc_blk_data *md = mq->data;
struct mmc_card *card = md->queue.card;
- unsigned int from, nr, arg;
+ unsigned int uninitialized_var(from);
+ unsigned int uninitialized_var(nr);
+ unsigned int uninitialized_var(arg);
int err = 0, type = MMC_BLK_SECDISCARD;
if (!(mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card))) {
Is not the problem only related to the arg variable?
What about:
unsigned int from, nr, arg = 0;
Yours!
Ulf Hansson
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