path: root/arch/sparc/mm
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authorDavid S. Miller <davem@davemloft.net>2010-05-25 23:36:31 -0700
committerDavid S. Miller <davem@davemloft.net>2010-05-25 23:36:31 -0700
commitc87fe1c05d57e3fecd62e56da1b1ac4291116ebf (patch)
tree48b6aa47000becb4ba08c1dc230e1471f64b7b02 /arch/sparc/mm
parentb1cdc4670b9508fcd47a15fbd12f70d269880b37 (diff)
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/mm')
2 files changed, 0 insertions, 5 deletions
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index f5f75a58e0b..b0b43aa5e45 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -2215,8 +2215,6 @@ void __init ld_mmu_srmmu(void)
BTFIXUPSET_CALL(pmd_page, srmmu_pmd_page, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(pgd_page_vaddr, srmmu_pgd_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_SETHI(none_mask, 0xF0000000);
BTFIXUPSET_CALL(pte_present, srmmu_pte_present, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_SWAPO0G0);
diff --git a/arch/sparc/mm/sun4c.c b/arch/sparc/mm/sun4c.c
index cf38846753d..4289f90f869 100644
--- a/arch/sparc/mm/sun4c.c
+++ b/arch/sparc/mm/sun4c.c
@@ -2087,9 +2087,6 @@ void __init ld_mmu_sun4c(void)
BTFIXUPSET_CALL(set_pte, sun4c_set_pte, BTFIXUPCALL_STO1O0);
- /* The 2.4.18 code does not set this on sun4c, how does it work? XXX */
- /* BTFIXUPSET_SETHI(none_mask, 0x00000000); */ /* Defaults to zero? */
BTFIXUPSET_CALL(pte_pfn, sun4c_pte_pfn, BTFIXUPCALL_NORM);
#if 0 /* PAGE_SHIFT <= 12 */ /* Eek. Investigate. XXX */