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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
[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>
authored by Hugh Dickins and committed by Linus Torvalds 7ce774b4 01edcd89
-4
arch/powerpc/mm/4xx_mmu.c
-4
arch/powerpc/mm/4xx_mmu.c
···
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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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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;