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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>
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01edcd891c
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1 changed files with 0 additions and 4 deletions
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@ -110,13 +110,11 @@ unsigned long __init mmu_mapin_ram(void)
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pmd_t *pmdp;
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unsigned long val = p | _PMD_SIZE_16M | _PAGE_HWEXEC | _PAGE_HWWRITE;
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spin_lock(&init_mm.page_table_lock);
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pmdp = pmd_offset(pgd_offset_k(v), v);
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pmd_val(*pmdp++) = val;
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pmd_val(*pmdp++) = val;
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pmd_val(*pmdp++) = val;
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pmd_val(*pmdp++) = val;
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spin_unlock(&init_mm.page_table_lock);
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v += LARGE_PAGE_SIZE_16M;
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p += LARGE_PAGE_SIZE_16M;
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@ -127,10 +125,8 @@ unsigned long __init mmu_mapin_ram(void)
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pmd_t *pmdp;
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unsigned long val = p | _PMD_SIZE_4M | _PAGE_HWEXEC | _PAGE_HWWRITE;
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spin_lock(&init_mm.page_table_lock);
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pmdp = pmd_offset(pgd_offset_k(v), v);
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pmd_val(*pmdp) = val;
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spin_unlock(&init_mm.page_table_lock);
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v += LARGE_PAGE_SIZE_4M;
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p += LARGE_PAGE_SIZE_4M;
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