From c87fe1c05d57e3fecd62e56da1b1ac4291116ebf Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 25 May 2010 23:36:31 -0700 Subject: [PATCH] sparc32: Kill none_mask, it's bogus. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: David S. Miller --- arch/sparc/include/asm/pgtable_32.h | 5 ++--- arch/sparc/mm/srmmu.c | 2 -- arch/sparc/mm/sun4c.c | 3 --- 3 files changed, 2 insertions(+), 8 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) diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c index f5f75a58e0b3..b0b43aa5e45a 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 cf38846753dd..4289f90f8697 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 */ BTFIXUPSET_CALL(pmd_page, sun4c_pmd_page, BTFIXUPCALL_ANDNINT(PAGE_SIZE - 1)); -- GitLab