[PATCH] ipc/mqueue: use unsigned int for retval

From: Nicholas Mc Guire
Date: Fri Feb 10 2017 - 02:36:29 EST

The retval variable is assigned by bitops only and thus there is no
reason to use a signed type. Further matching it with the return
type of the function also makes static code checkers happy.

Signed-off-by: Nicholas Mc Guire <der.herr@xxxxxxx>

Found by experimental type-checking coccinelle script

Patch was compile tested with: x86_64_defconfig

Patch is against 4.10-rc6 (localversion-next is next-20170209)

ipc/mqueue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 4fdd970..897ce70 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -519,7 +519,7 @@ static int mqueue_flush_file(struct file *filp, fl_owner_t id)
static unsigned int mqueue_poll_file(struct file *filp, struct poll_table_struct *poll_tab)
struct mqueue_inode_info *info = MQUEUE_I(file_inode(filp));
- int retval = 0;
+ unsigned int retval = 0;

poll_wait(filp, &info->wait_q, poll_tab);