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[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>
This commit is contained in:
Hugh Dickins 2005-11-23 13:37:39 -08:00 committed by Linus Torvalds
parent 01edcd891c
commit 7ce774b480
1 changed files with 0 additions and 4 deletions
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4
arch/powerpc/mm/4xx_mmu.c
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@ -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;