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                         unsigned long start, unsigned long end)
  22 {
  23 }
  24
  25 static inline void arch_bprm_mm_init(struct mm_struct *mm,
  26                                      struct vm_area_struct *vma)
  27 {
  28 }
  29
  30 static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
  31                 bool write, bool execute, bool foreign)
  32 {
  33         /* by default, allow everything */
  34         return true;
  35 }
  36 #endif  /* _ASM_GENERIC_MM_HOOKS_H */