[PATCHv2 01/12] asm-generic: mm_hooks: allow hooks to be overridden individually
From: mark.rutland@arm.com (Mark Rutland)
Date: 2017-11-27 16:38:27
Also in:
kvmarm, linux-arch, lkml
Subsystem:
generic include/asm header files, the rest · Maintainers:
Arnd Bergmann, Linus Torvalds
Currently, an architecture must either implement all of the mm hooks itself, or use all of those provided by the asm-generic implementation. When an architecture only needs to override a single hook, it must copy the stub implementations from the asm-generic version. To avoid this repetition, allow each hook to be overridden indiviually, by placing each under an #ifndef block. As architectures providing their own hooks can't include this file today, this shouldn't adversely affect any existing hooks. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-arch at vger.kernel.org --- include/asm-generic/mm_hooks.h | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/include/asm-generic/mm_hooks.h b/include/asm-generic/mm_hooks.h
index ea189d88a3cc..34edf0850d49 100644
--- a/include/asm-generic/mm_hooks.h
+++ b/include/asm-generic/mm_hooks.h@@ -7,30 +7,41 @@ #ifndef _ASM_GENERIC_MM_HOOKS_H #define _ASM_GENERIC_MM_HOOKS_H +#ifndef arch_dup_mmap static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) { } +#endif +#ifndef arch_exit_mmap static inline void arch_exit_mmap(struct mm_struct *mm) { } +#endif +#ifndef arch_unmap static inline void arch_unmap(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long start, unsigned long end) { } +#endif +#ifndef arch_bprm_mm_init static inline void arch_bprm_mm_init(struct mm_struct *mm, struct vm_area_struct *vma) { } +#endif +#ifndef arch_vma_access_permitted static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, bool write, bool execute, bool foreign) { /* by default, allow everything */ return true; } +#endif + #endif /* _ASM_GENERIC_MM_HOOKS_H */
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2.11.0