diff options
| author | Dave Hansen <dave.hansen@linux.intel.com> | 2014-11-18 21:23:50 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-11-19 13:54:13 +0300 |
| commit | 62e88b1c00de9cb30d937841ed5debed871070b8 (patch) | |
| tree | fe74bed1563012ebbab7a3d4c87caaa25c804593 /include/asm-generic | |
| parent | a1ea1c032b8f8c23d86ef4db6d061527e9417f19 (diff) | |
| download | linux-62e88b1c00de9cb30d937841ed5debed871070b8.tar.xz | |
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 <dave.hansen@linux.intel.com>
Cc: Dave Hansen <dave@sr71.net>
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 <tglx@linutronix.de>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/mm_hooks.h | 17 | ||||
| -rw-r--r-- | include/asm-generic/mmu_context.h | 6 |
2 files changed, 14 insertions, 9 deletions
diff --git a/include/asm-generic/mm_hooks.h b/include/asm-generic/mm_hooks.h index 67dea8123683..866aa461efa5 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 aa2d8ba35b20..1f2a8f9c9264 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 */ |