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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
···
110
pmd_t *pmdp;
111
unsigned long val = p | _PMD_SIZE_16M | _PAGE_HWEXEC | _PAGE_HWWRITE;
112
113
-
spin_lock(&init_mm.page_table_lock);
114
pmdp = pmd_offset(pgd_offset_k(v), v);
115
pmd_val(*pmdp++) = val;
116
pmd_val(*pmdp++) = val;
117
pmd_val(*pmdp++) = val;
118
pmd_val(*pmdp++) = val;
119
-
spin_unlock(&init_mm.page_table_lock);
120
121
v += LARGE_PAGE_SIZE_16M;
122
p += LARGE_PAGE_SIZE_16M;
···
125
pmd_t *pmdp;
126
unsigned long val = p | _PMD_SIZE_4M | _PAGE_HWEXEC | _PAGE_HWWRITE;
127
128
-
spin_lock(&init_mm.page_table_lock);
129
pmdp = pmd_offset(pgd_offset_k(v), v);
130
pmd_val(*pmdp) = val;
131
-
spin_unlock(&init_mm.page_table_lock);
132
133
v += LARGE_PAGE_SIZE_4M;
134
p += LARGE_PAGE_SIZE_4M;
···
110
pmd_t *pmdp;
111
unsigned long val = p | _PMD_SIZE_16M | _PAGE_HWEXEC | _PAGE_HWWRITE;
112
113
pmdp = pmd_offset(pgd_offset_k(v), v);
114
pmd_val(*pmdp++) = val;
115
pmd_val(*pmdp++) = val;
116
pmd_val(*pmdp++) = val;
117
pmd_val(*pmdp++) = val;
118
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v += LARGE_PAGE_SIZE_16M;
120
p += LARGE_PAGE_SIZE_16M;
···
127
pmd_t *pmdp;
128
unsigned long val = p | _PMD_SIZE_4M | _PAGE_HWEXEC | _PAGE_HWWRITE;
129
130
pmdp = pmd_offset(pgd_offset_k(v), v);
131
pmd_val(*pmdp) = val;
132
133
v += LARGE_PAGE_SIZE_4M;
134
p += LARGE_PAGE_SIZE_4M;