Re: [PATCH] pte_alloc_kernel needs additional check

From: William Lee Irwin III (wli@holomorphy.com)
Date: Mon Feb 24 2003 - 18:45:36 EST

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Paul Larson <plars@linuxtestproject.org> wrote:
- return pte_offset_kernel(pmd, address);
+ if (pmd_present(*pmd))
+ return pte_offset_kernel(pmd, address);
+ return NULL;

On Mon, Feb 24, 2003 at 02:33:41PM -0800, Andrew Morton wrote:
> Confused. I cannot see a codepath which makes this test necessary?

Looks like it's OOM handling by analogy with pte_alloc_map().

-- wli
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