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Commit 9a804fec authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Ingo Molnar
Browse files

mm/gup: Drop the arch_pte_access_permitted() MMU callback 



The only arch that defines it to something meaningful is x86.
But x86 doesn't use the generic GUP_fast() implementation -- the
only place where the callback is called.

Let's drop it.

Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Aneesh Kumar K . V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dann Frazier <dann.frazier@canonical.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Steve Capper <steve.capper@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20170316152655.37789-2-kirill.shutemov@linux.intel.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent f991376e

arch/powerpc/include/asm/mmu_context.h

+0 −6
Original line number Original line Diff line number Diff line
@@ -163,11 +163,5 @@ static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, 
	/* by default, allow everything */

	/* by default, allow everything */

	return true;

	return true;

}

}



static inline bool arch_pte_access_permitted(pte_t pte, bool write)

{

	/* by default, allow everything */

	return true;

}

#endif /* __KERNEL__ */

#endif /* __KERNEL__ */

#endif /* __ASM_POWERPC_MMU_CONTEXT_H */
 
#endif /* __ASM_POWERPC_MMU_CONTEXT_H */

arch/s390/include/asm/mmu_context.h

+0 −6
Original line number Original line Diff line number Diff line
@@ -156,10 +156,4 @@ static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, 
	/* by default, allow everything */

	/* by default, allow everything */

	return true;

	return true;

}

}



static inline bool arch_pte_access_permitted(pte_t pte, bool write)

{

	/* by default, allow everything */

	return true;

}

#endif /* __S390_MMU_CONTEXT_H */
 
#endif /* __S390_MMU_CONTEXT_H */

arch/um/include/asm/mmu_context.h

+0 −6
Original line number Original line Diff line number Diff line
@@ -37,12 +37,6 @@ static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, 
	return true;

	return true;

}

}





static inline bool arch_pte_access_permitted(pte_t pte, bool write)

{

	/* by default, allow everything */

	return true;

}



/*

/*

 * end asm-generic/mm_hooks.h functions

 * end asm-generic/mm_hooks.h functions

 */

 */

arch/unicore32/include/asm/mmu_context.h

+0 −6
Original line number Original line Diff line number Diff line
@@ -103,10 +103,4 @@ static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, 
	/* by default, allow everything */

	/* by default, allow everything */

	return true;

	return true;

}

}



static inline bool arch_pte_access_permitted(pte_t pte, bool write)

{

	/* by default, allow everything */

	return true;

}

#endif
 
#endif

arch/x86/include/asm/mmu_context.h

+0 −4
Original line number Original line Diff line number Diff line
@@ -268,8 +268,4 @@ static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, 
	return __pkru_allows_pkey(vma_pkey(vma), write);

	return __pkru_allows_pkey(vma_pkey(vma), write);

}

}





static inline bool arch_pte_access_permitted(pte_t pte, bool write)

{

	return __pkru_allows_pkey(pte_flags_pkey(pte_flags(pte)), write);

}

#endif /* _ASM_X86_MMU_CONTEXT_H */
 
#endif /* _ASM_X86_MMU_CONTEXT_H */