include/asm-generic/mm_hooks.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Define generic no-op hooks for arch_dup_mmap, arch_exit_mmap
   4  * and arch_unmap to be included in asm-FOO/mmu_context.h for any
   5  * arch FOO which doesn't need to hook these.
   6  */
   7 #ifndef _ASM_GENERIC_MM_HOOKS_H
   8 #define _ASM_GENERIC_MM_HOOKS_H
   9
  10 static inline int arch_dup_mmap(struct mm_struct *oldmm,
  11                                 struct mm_struct *mm)
  12 {
  13         return 0;
  14 }
  15
  16 static inline void arch_exit_mmap(struct mm_struct *mm)
  17 {
  18 }
  19
  20 static inline void arch_unmap(struct mm_struct *mm,
  21                         struct vm_area_struct *vma,
  22                         unsigned long start, unsigned long end)
  23 {
  24 }
  25
  26 static inline void arch_bprm_mm_init(struct mm_struct *mm,
  27                                      struct vm_area_struct *vma)
  28 {
  29 }
  30
  31 static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
  32                 bool write, bool execute, bool foreign)
  33 {
  34         /* by default, allow everything */
  35         return true;
  36 }
  37 #endif  /* _ASM_GENERIC_MM_HOOKS_H */