From: Paul Larson <plars@linuxtestproject.org>
To: linux-mm <linux-mm@kvack.org>, lkml <linux-kernel@vger.kernel.org>
Subject: [PATCH] pte_alloc_kernel needs additional check
Date: 24 Feb 2003 15:54:39 -0600 [thread overview]
Message-ID: <1046123680.13919.67.camel@plars> (raw)
This applies against 2.5.63.
pte_alloc_kernel needs a check for pmd_present(*pmd) at the end.
Thanks,
Paul Larson
--- linux-2.5.63/mm/memory.c Mon Feb 24 13:05:31 2003
+++ linux-2.5.63-fix/mm/memory.c Mon Feb 24 15:45:05 2003
@@ -186,7 +186,9 @@
pmd_populate_kernel(mm, pmd, new);
}
out:
- return pte_offset_kernel(pmd, address);
+ if (pmd_present(*pmd))
+ return pte_offset_kernel(pmd, address);
+ return NULL;
}
#define PTE_TABLE_MASK ((PTRS_PER_PTE-1) * sizeof(pte_t))
#define PMD_TABLE_MASK ((PTRS_PER_PMD-1) * sizeof(pmd_t))
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next reply other threads:[~2003-02-24 21:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-24 21:54 Paul Larson [this message]
2003-02-24 22:33 ` Andrew Morton
2003-02-24 23:45 ` William Lee Irwin III
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