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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-12-08 21:08:44 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-12-18 14:54:26 +1100
commit50891457f1001450be61be0861b2b49abdcb5fb9 (patch)
tree655ba01774854f86665aca52478527e8798fa520 /arch/powerpc
parent030bdc3fd0807b6097a937468859f4b4baf1b950 (diff)
powerpc/mm: Fix a WARN_ON() with CONFIG_DEBUG_PAGEALLOC and CONFIG_DEBUG_VM
Set need to call __set_pte_at() and not set_pte_at() from __change_page_attr() since the later will perform checks with CONFIG_DEBUG_VM that aren't suitable to the way we override an existing PTE. (More specifically, it doesn't let you write over a present PTE). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/mm/pgtable_32.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 177e4038b43..573b3bd1c45 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -382,7 +382,7 @@ static int __change_page_attr(struct page *page, pgprot_t prot)
return 0;
if (!get_pteptr(&init_mm, address, &kpte, &kpmd))
return -EINVAL;
- set_pte_at(&init_mm, address, kpte, mk_pte(page, prot));
+ __set_pte_at(&init_mm, address, kpte, mk_pte(page, prot), 0);
wmb();
#ifdef CONFIG_PPC_STD_MMU
flush_hash_pages(0, address, pmd_val(*kpmd), 1);