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[PATCH] IA64: virt_to_page() can be called with NULL arg [message #9107]

Mon, 18 December 2006 12:03

Kirill Korotaev
Messages: 137
Registered: January 2006

Senior Member

[IA64] virt_to_page() cannot be called with NULL (mainstream bug)

It does not return NULL when arg is NULL.

Signed-Off-By: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-Off-By: Kirill Korotaev <dev@openvz.org>

--- linus-2.6.git/include/asm-ia64/pgalloc.h.orig 2006-12-18 14:59:09.000000000 +0300
+++ linus-2.6.git/include/asm-ia64/pgalloc.h 2006-12-18 15:07:44.000000000 +0300
@@ -137,7 +137,8 @@ pmd_populate_kernel(struct mm_struct *mm
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long addr)
{
- return virt_to_page(pgtable_quicklist_alloc());
+ void *pg = pgtable_quicklist_alloc();
+ return pg ? virt_to_page(pg) : NULL;
}

static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,

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