lkml.org 
[lkml]   [2006]   [May]   [10]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH -mm] sys_semctl gcc 4.1 warning fix
FromAlan Cox <>
DateWed, 10 May 2006 11:34:26 +0100
On Maw, 2006-05-09 at 19:56 -0700, Daniel Walker wrote:
> Fixes the following warnings,
> 
> ipc/sem.c: In function 'sys_semctl':
> ipc/sem.c:810: warning: 'setbuf.uid' may be used uninitialized in this function
> ipc/sem.c:810: warning: 'setbuf.gid' may be used uninitialized in this function
> ipc/sem.c:810: warning: 'setbuf.mode' may be used uninitialized in this function
> 
> Signed-Off-By: Daniel Walker <dwalker@mvista.com>
> 
> Index: linux-2.6.16/ipc/sem.c
> ===================================================================
> --- linux-2.6.16.orig/ipc/sem.c
> +++ linux-2.6.16/ipc/sem.c
> @@ -807,7 +807,7 @@ static int semctl_down(int semid, int se
>  {
>  	struct sem_array *sma;
>  	int err;
> -	struct sem_setbuf setbuf;
> +	struct sem_setbuf setbuf = {0, 0, 0};


This causes very poor code as its initializing an object on the stack.
It also appears from inspection to be entirely un-neccessary. Instead
the compiler needs some help.

Hiding warnings like this can be a hazard as it will hide real warnings
later on.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-05-10 12:24    [from the cache]
©2003-2008