From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755742AbaKSK6R (ORCPT ); Wed, 19 Nov 2014 05:58:17 -0500 Received: from terminus.zytor.com ([198.137.202.10]:35712 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755430AbaKSK6N (ORCPT ); Wed, 19 Nov 2014 05:58:13 -0500 Date: Wed, 19 Nov 2014 02:58:02 -0800 From: tip-bot for Dave Hansen Message-ID: Cc: linux-kernel@vger.kernel.org, dave@sr71.net, hpa@zytor.com, dave.hansen@linux.intel.com, tglx@linutronix.de, mingo@kernel.org Reply-To: dave.hansen@linux.intel.com, tglx@linutronix.de, mingo@kernel.org, linux-kernel@vger.kernel.org, dave@sr71.net, hpa@zytor.com In-Reply-To: <20141118182350.8B4AA2C2@viggo.jf.intel.com> References: <20141118182350.8B4AA2C2@viggo.jf.intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/mpx] mm: Make arch_unmap()/bprm_mm_init() available to all architectures Git-Commit-ID: 62e88b1c00de9cb30d937841ed5debed871070b8 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 62e88b1c00de9cb30d937841ed5debed871070b8 Gitweb: http://git.kernel.org/tip/62e88b1c00de9cb30d937841ed5debed871070b8 Author: Dave Hansen AuthorDate: Tue, 18 Nov 2014 10:23:50 -0800 Committer: Thomas Gleixner CommitDate: Wed, 19 Nov 2014 11:54:13 +0100 mm: Make arch_unmap()/bprm_mm_init() available to all architectures The x86 MPX patch set calls arch_unmap() and arch_bprm_mm_init() from fs/exec.c, so we need at least a stub for them in all architectures. They are only called under an #ifdef for CONFIG_MMU=y, so we can at least restict this to architectures with MMU support. blackfin/c6x have no MMU support, so do not call arch_unmap(). They also do not include mm_hooks.h or mmu_context.h at all and do not need to be touched. s390, um and unicore32 do not use asm-generic/mm_hooks.h, so got their own arch_unmap() versions. (I also moved um's arch_dup_mmap() to be closer to the other mm_hooks.h functions). xtensa only includes mm_hooks when MMU=y, which should be fine since arch_unmap() is called only from MMU=y code. For the rest, we use the stub copies of these functions in asm-generic/mm_hook.h. I cross compiled defconfigs for cris (to check NOMMU) and s390 to make sure that this works. I also checked a 64-bit build of UML and all my normal x86 builds including PARAVIRT on and off. Signed-off-by: Dave Hansen Cc: Dave Hansen Cc: linux-arch@vger.kernel.org Cc: x86@kernel.org Link: http://lkml.kernel.org/r/20141118182350.8B4AA2C2@viggo.jf.intel.com Signed-off-by: Thomas Gleixner --- arch/s390/include/asm/mmu_context.h | 11 +++++++++++ arch/um/include/asm/mmu_context.h | 24 +++++++++++++++++++----- arch/unicore32/include/asm/mmu_context.h | 11 +++++++++++ include/asm-generic/mm_hooks.h | 17 ++++++++++++++--- include/asm-generic/mmu_context.h | 6 ------ 5 files changed, 55 insertions(+), 14 deletions(-) diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h index 3815bfe..f49b719 100644 --- a/arch/s390/include/asm/mmu_context.h +++ b/arch/s390/include/asm/mmu_context.h @@ -120,4 +120,15 @@ static inline void arch_exit_mmap(struct mm_struct *mm) { } +static inline void arch_unmap(struct mm_struct *mm, + struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ +} + +static inline void arch_bprm_mm_init(struct mm_struct *mm, + struct vm_area_struct *vma) +{ +} + #endif /* __S390_MMU_CONTEXT_H */ diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/asm/mmu_context.h index aa4a743..941527e 100644 --- a/arch/um/include/asm/mmu_context.h +++ b/arch/um/include/asm/mmu_context.h @@ -10,7 +10,26 @@ #include extern void uml_setup_stubs(struct mm_struct *mm); +/* + * Needed since we do not use the asm-generic/mm_hooks.h: + */ +static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) +{ + uml_setup_stubs(mm); +} extern void arch_exit_mmap(struct mm_struct *mm); +static inline void arch_unmap(struct mm_struct *mm, + struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ +} +static inline void arch_bprm_mm_init(struct mm_struct *mm, + struct vm_area_struct *vma) +{ +} +/* + * end asm-generic/mm_hooks.h functions + */ #define deactivate_mm(tsk,mm) do { } while (0) @@ -41,11 +60,6 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, } } -static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) -{ - uml_setup_stubs(mm); -} - static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) { diff --git a/arch/unicore32/include/asm/mmu_context.h b/arch/unicore32/include/asm/mmu_context.h index ef470a7..1cb5220 100644 --- a/arch/unicore32/include/asm/mmu_context.h +++ b/arch/unicore32/include/asm/mmu_context.h @@ -86,4 +86,15 @@ static inline void arch_dup_mmap(struct mm_struct *oldmm, { } +static inline void arch_unmap(struct mm_struct *mm, + struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ +} + +static inline void arch_bprm_mm_init(struct mm_struct *mm, + struct vm_area_struct *vma) +{ +} + #endif diff --git a/include/asm-generic/mm_hooks.h b/include/asm-generic/mm_hooks.h index 67dea81..866aa46 100644 --- a/include/asm-generic/mm_hooks.h +++ b/include/asm-generic/mm_hooks.h @@ -1,7 +1,7 @@ /* - * Define generic no-op hooks for arch_dup_mmap and arch_exit_mmap, to - * be included in asm-FOO/mmu_context.h for any arch FOO which doesn't - * need to hook these. + * Define generic no-op hooks for arch_dup_mmap, arch_exit_mmap + * and arch_unmap to be included in asm-FOO/mmu_context.h for any + * arch FOO which doesn't need to hook these. */ #ifndef _ASM_GENERIC_MM_HOOKS_H #define _ASM_GENERIC_MM_HOOKS_H @@ -15,4 +15,15 @@ static inline void arch_exit_mmap(struct mm_struct *mm) { } +static inline void arch_unmap(struct mm_struct *mm, + struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ +} + +static inline void arch_bprm_mm_init(struct mm_struct *mm, + struct vm_area_struct *vma) +{ +} + #endif /* _ASM_GENERIC_MM_HOOKS_H */ diff --git a/include/asm-generic/mmu_context.h b/include/asm-generic/mmu_context.h index aa2d8ba..1f2a8f9 100644 --- a/include/asm-generic/mmu_context.h +++ b/include/asm-generic/mmu_context.h @@ -47,10 +47,4 @@ static inline void arch_bprm_mm_init(struct mm_struct *mm, { } -static inline void arch_unmap(struct mm_struct *mm, - struct vm_area_struct *vma, - unsigned long start, unsigned long end) -{ -} - #endif /* __ASM_GENERIC_MMU_CONTEXT_H */