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authorHugh Dickins <hugh@veritas.com>2005-11-23 13:37:39 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-23 16:08:38 -0800
commit7ce774b4808c019c2f143ff5dea1a1b094ff01e1 (patch)
tree604b9e5395cb70a8cfef0fcb05464dcf3dfdba23 /arch/powerpc/mm/4xx_mmu.c
parent[PATCH] mm: powerpc ptlock comments (diff)
downloadlinux-dev-7ce774b4808c019c2f143ff5dea1a1b094ff01e1.tar.xz
linux-dev-7ce774b4808c019c2f143ff5dea1a1b094ff01e1.zip
[PATCH] mm: powerpc init_mm without ptlock
Restore an earlier mod which went missing in the powerpc reshuffle: the 4xx mmu_mapin_ram does not need to take init_mm.page_table_lock. Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to '')
-rw-r--r--arch/powerpc/mm/4xx_mmu.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/powerpc/mm/4xx_mmu.c b/arch/powerpc/mm/4xx_mmu.c
index b7bcbc232f39..4d006aa1a0d1 100644
--- a/arch/powerpc/mm/4xx_mmu.c
+++ b/arch/powerpc/mm/4xx_mmu.c
@@ -110,13 +110,11 @@ unsigned long __init mmu_mapin_ram(void)
pmd_t *pmdp;
unsigned long val = p | _PMD_SIZE_16M | _PAGE_HWEXEC | _PAGE_HWWRITE;
- spin_lock(&init_mm.page_table_lock);
pmdp = pmd_offset(pgd_offset_k(v), v);
pmd_val(*pmdp++) = val;
pmd_val(*pmdp++) = val;
pmd_val(*pmdp++) = val;
pmd_val(*pmdp++) = val;
- spin_unlock(&init_mm.page_table_lock);
v += LARGE_PAGE_SIZE_16M;
p += LARGE_PAGE_SIZE_16M;
@@ -127,10 +125,8 @@ unsigned long __init mmu_mapin_ram(void)
pmd_t *pmdp;
unsigned long val = p | _PMD_SIZE_4M | _PAGE_HWEXEC | _PAGE_HWWRITE;
- spin_lock(&init_mm.page_table_lock);
pmdp = pmd_offset(pgd_offset_k(v), v);
pmd_val(*pmdp) = val;
- spin_unlock(&init_mm.page_table_lock);
v += LARGE_PAGE_SIZE_4M;
p += LARGE_PAGE_SIZE_4M;