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| author | David S. Miller <davem@davemloft.net> | 2010-05-25 23:36:31 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-25 23:36:31 -0700 |
| commit | c87fe1c05d57e3fecd62e56da1b1ac4291116ebf (patch) | |
| tree | 48b6aa47000becb4ba08c1dc230e1471f64b7b02 /arch/sparc/include | |
| parent | b1cdc4670b9508fcd47a15fbd12f70d269880b37 (diff) | |
| download | blackbird-obmc-linux-c87fe1c05d57e3fecd62e56da1b1ac4291116ebf.tar.gz blackbird-obmc-linux-c87fe1c05d57e3fecd62e56da1b1ac4291116ebf.zip | |
sparc32: Kill none_mask, it's bogus.
For some reason, the pte_none() calculation for srmmu sparc32
chips was masking out the top 4 bits. That doesn't make any
sense, as those are just some of the physical bits of the PTE
encoding.
Furthermore, this mistake breaks things when the offset of of a swap
entry has a large enough offset as reported by Тхай Кирилл.
Sun4c always set it to zero, so it's really completely useless,
kill it.
Reported-by: Тхай Кирилл <tkhai@yandex.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include')
| -rw-r--r-- | arch/sparc/include/asm/pgtable_32.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h index 77f906d8cc21..0ece77f47753 100644 --- a/arch/sparc/include/asm/pgtable_32.h +++ b/arch/sparc/include/asm/pgtable_32.h @@ -142,13 +142,12 @@ BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page_vaddr, pgd_t) #define pmd_page(pmd) BTFIXUP_CALL(pmd_page)(pmd) #define pgd_page_vaddr(pgd) BTFIXUP_CALL(pgd_page_vaddr)(pgd) -BTFIXUPDEF_SETHI(none_mask) BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t) BTFIXUPDEF_CALL(void, pte_clear, pte_t *) static inline int pte_none(pte_t pte) { - return !(pte_val(pte) & ~BTFIXUP_SETHI(none_mask)); + return !pte_val(pte); } #define pte_present(pte) BTFIXUP_CALL(pte_present)(pte) @@ -160,7 +159,7 @@ BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *) static inline int pmd_none(pmd_t pmd) { - return !(pmd_val(pmd) & ~BTFIXUP_SETHI(none_mask)); + return !pmd_val(pmd); } #define pmd_bad(pmd) BTFIXUP_CALL(pmd_bad)(pmd) |
