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sh64: Invert page fault fast-path error path values.

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This brings the sh64 version in line with the sh32 one with regards to
how errors are handled. Base work for further unification of the
implementations.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2012-05-14 16:44:45 +09:00
parent c06fd28387
commit 4de5185629
2 changed files with 19 additions and 19 deletions
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2
arch/sh/kernel/cpu/sh5/entry.S
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@ -335,7 +335,7 @@ tlb_miss:
/* If the fast path handler fixed the fault, just drop through quickly
to the restore code right away to return to the excepting context.
*/
beqi/u r2, 0, tr1
bnei/u r2, 0, tr1
fast_tlb_miss_restore:
ld.q SP, SAVED_TR0, r2

36
arch/sh/mm/tlbex_64.c
View File

@ -53,23 +53,23 @@ static int handle_vmalloc_fault(struct mm_struct *mm,
pud = pud_offset(dir, address);
if (pud_none_or_clear_bad(pud))
return 0;
return 1;
pmd = pmd_offset(pud, address);
if (pmd_none_or_clear_bad(pmd))
return 0;
return 1;
pte = pte_offset_kernel(pmd, address);
entry = *pte;
if (pte_none(entry) || !pte_present(entry))
return 0;
return 1;
if ((pte_val(entry) & protection_flags) != protection_flags)
return 0;
return 1;
update_mmu_cache(NULL, address, pte);
return 1;
return 0;
}
static int handle_tlbmiss(struct mm_struct *mm,
@ -94,27 +94,27 @@ static int handle_tlbmiss(struct mm_struct *mm,
the next test is necessary. - RPC */
if (address >= (unsigned long) TASK_SIZE)
/* upper half - never has page table entries. */
return 0;
return 1;
dir = pgd_offset(mm, address);
if (pgd_none(*dir) || !pgd_present(*dir))
return 0;
return 1;
if (!pgd_present(*dir))
return 0;
return 1;
pud = pud_offset(dir, address);
if (pud_none(*pud) || !pud_present(*pud))
return 0;
return 1;
pmd = pmd_offset(pud, address);
if (pmd_none(*pmd) || !pmd_present(*pmd))
return 0;
return 1;
pte = pte_offset_kernel(pmd, address);
entry = *pte;
if (pte_none(entry) || !pte_present(entry))
return 0;
return 1;
/*
* If the page doesn't have sufficient protection bits set to
@ -123,11 +123,11 @@ static int handle_tlbmiss(struct mm_struct *mm,
* handler.
*/
if ((pte_val(entry) & protection_flags) != protection_flags)
return 0;
return 1;
update_mmu_cache(NULL, address, pte);
return 1;
return 0;
}
/*
@ -214,12 +214,12 @@ asmlinkage int do_fast_page_fault(unsigned long long ssr_md,
* Process-contexts can never have this address
* range mapped
*/
if (handle_vmalloc_fault(mm, protection_flags, address))
return 1;
if (handle_vmalloc_fault(mm, protection_flags, address) == 0)
return 0;
} else if (!in_interrupt() && mm) {
if (handle_tlbmiss(mm, protection_flags, address))
return 1;
if (handle_tlbmiss(mm, protection_flags, address) == 0)
return 0;
}
return 0;
return 1;
}