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Subject[PATCH 08/15] 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>
---

arch/powerpc/mm/4xx_mmu.c | 4 ----
1 files changed, 4 deletions(-)

--- mm07/arch/powerpc/mm/4xx_mmu.c 2005-11-07 07:39:05.000000000 +0000
+++ mm08/arch/powerpc/mm/4xx_mmu.c 2005-11-09 14:39:29.000000000 +0000
@@ -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;
-
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