2012-02-24 07:09:31

by santosh nayak

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Subject: [PATCH] xfs: Use memset to initialize structure member.

From: Santosh Nayak <[email protected]>

Sparse is giving following warning:
fs/xfs/xfs_bmap.c:4826:41: warning: Using plain integer as NULL pointer.

To avoid this warning, use memset to initialize the structure member.

Signed-off-by: Santosh Nayak <[email protected]>
---
fs/xfs/xfs_bmap.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 188ef2f..030e93f 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -4823,7 +4823,7 @@ xfs_bmapi_write(
{
struct xfs_mount *mp = ip->i_mount;
struct xfs_ifork *ifp;
- struct xfs_bmalloca bma = { 0 }; /* args for xfs_bmap_alloc */
+ struct xfs_bmalloca bma; /* args for xfs_bmap_alloc */
xfs_fileoff_t end; /* end of mapped file region */
int eof; /* after the end of extents */
int error; /* error return */
@@ -4852,6 +4852,8 @@ xfs_bmapi_write(
ASSERT(!(flags & XFS_BMAPI_IGSTATE));
ASSERT(tp != NULL);
ASSERT(len > 0);
+
+ memset(&bma, 0, sizeof(bma));

whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
XFS_ATTR_FORK : XFS_DATA_FORK;
--
1.7.4.4


2012-02-24 07:51:59

by Dan Carpenter

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Subject: Re: [PATCH] xfs: Use memset to initialize structure member.

On Fri, Feb 24, 2012 at 12:38:42PM +0530, santosh nayak wrote:
> From: Santosh Nayak <[email protected]>
>
> Sparse is giving following warning:
> fs/xfs/xfs_bmap.c:4826:41: warning: Using plain integer as NULL pointer.
>

You could just do:
struct xfs_bmalloca bma = {};

But honestly, I'd just leave this one as is. The xfs people are
grumpy sorts and it's best to not send them these kinds of patches
that don't address a real bug.

regards,
dan


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2012-02-24 16:05:06

by Ben Myers

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Subject: Re: [PATCH] xfs: Use memset to initialize structure member.

Santosh,

On Fri, Feb 24, 2012 at 10:53:54AM +0300, Dan Carpenter wrote:
> On Fri, Feb 24, 2012 at 12:38:42PM +0530, santosh nayak wrote:
> > From: Santosh Nayak <[email protected]>
> >
> > Sparse is giving following warning:
> > fs/xfs/xfs_bmap.c:4826:41: warning: Using plain integer as NULL pointer.
> >
>
> You could just do:
> struct xfs_bmalloca bma = {};

This aggregate initializer seems cleaner than memset. Do you
mind resending the patch with Dan's suggestion?

Thanks for your contribution. ;)

-Ben