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SubjectRe: [Patch] mm/sparse.c: Check the return value of sparse_index_alloc().
On Thu, 15 Nov 2007 21:54:28 +0800
WANG Cong <xiyou.wangcong@gmail.com> wrote:

>
> Since sparse_index_alloc() can return NULL on memory allocation failure,
> we must deal with the failure condition when calling it.
>
> Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
> Cc: Christoph Lameter <clameter@sgi.com>
> Cc: Rik van Riel <riel@redhat.com>
>
> ---
>
> diff --git a/Makefile b/Makefile
> diff --git a/mm/sparse.c b/mm/sparse.c
> index e06f514..d245e59 100644
> --- a/mm/sparse.c
> +++ b/mm/sparse.c
> @@ -83,6 +83,8 @@ static int __meminit sparse_index_init(unsigned long section_nr, int nid)
> return -EEXIST;
>
> section = sparse_index_alloc(nid);
> + if (!section)
> + return -ENOMEM;
> /*
> * This lock keeps two different sections from
> * reallocating for the same index

Sure, but both callers of sparse_index_init() ignore its return value anyway.
-
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