Re: [PATCH] xfs: convert dquot iterator map allocation to kmalloc_array()

["Darrick J. Wong" <djwong@kernel.org>]

On Mon, Jun 01, 2026 at 03:18:57PM -0400, William Theesfeld wrote:
> Convert the open-coded kmalloc(n * sizeof(*p), ...) pattern in
> xfs_qm_dqiterate() to kmalloc_array(n, sizeof(*p), ...).  This matches
> the convention adopted across fs/xfs/ in commit 910bbdf2f4dXX ("xfs:
> convert buf_cancel_table allocation to kmalloc_array") and is the only
> remaining instance of the old pattern in fs/xfs/.
> 
> No functional change.  XFS_DQITER_MAP_SIZE is a compile-time constant
> (10) so the runtime overflow check added by kmalloc_array() folds away;
> the conversion is for consistency and to keep fs/xfs/ free of the
> deprecated form.
> 
> Signed-off-by: William Theesfeld <william@theesfeld.net>

Macros these days...
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>

--D

> ---
>  fs/xfs/xfs_qm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
> index 7bd15d9e7..eebdeb181 100644
> --- a/fs/xfs/xfs_qm.c
> +++ b/fs/xfs/xfs_qm.c
> @@ -1170,7 +1170,7 @@ xfs_qm_reset_dqcounts_buf(
>  	if (qip->i_nblocks == 0)
>  		return 0;
>  
> -	map = kmalloc(XFS_DQITER_MAP_SIZE * sizeof(*map),
> +	map = kmalloc_array(XFS_DQITER_MAP_SIZE, sizeof(*map),
>  			GFP_KERNEL | __GFP_NOFAIL);
>  
>  	lblkno = 0;
> -- 
> 2.54.0
> 
>