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Commit 4de51856 authored by Paul Mundt's avatar Paul Mundt
Browse files

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



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: default avatarPaul Mundt <lethal@linux-sh.org>
parent c06fd283

arch/sh/kernel/cpu/sh5/entry.S

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/sh/mm/tlbex_64.c

+18 −18
Original line number Diff line number Diff line
@@ -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;

}