diff options
Diffstat (limited to 'mm/vma.h')
| -rw-r--r-- | mm/vma.h | 57 |
1 files changed, 38 insertions, 19 deletions
@@ -87,6 +87,12 @@ struct vma_merge_struct { struct anon_vma_name *anon_name; enum vma_merge_flags merge_flags; enum vma_merge_state state; + + /* + * If a merge is possible, but an OOM error occurs, give up and don't + * execute the merge, returning NULL. + */ + bool give_up_on_oom :1; }; static inline bool vmg_nomem(struct vma_merge_struct *vmg) @@ -139,15 +145,10 @@ void validate_mm(struct mm_struct *mm); #define validate_mm(mm) do { } while (0) #endif -/* Required for expand_downwards(). */ -void anon_vma_interval_tree_pre_update_vma(struct vm_area_struct *vma); - -/* Required for expand_downwards(). */ -void anon_vma_interval_tree_post_update_vma(struct vm_area_struct *vma); - -int vma_expand(struct vma_merge_struct *vmg); -int vma_shrink(struct vma_iterator *vmi, struct vm_area_struct *vma, - unsigned long start, unsigned long end, pgoff_t pgoff); +__must_check int vma_expand(struct vma_merge_struct *vmg); +__must_check int vma_shrink(struct vma_iterator *vmi, + struct vm_area_struct *vma, + unsigned long start, unsigned long end, pgoff_t pgoff); static inline int vma_iter_store_gfp(struct vma_iterator *vmi, struct vm_area_struct *vma, gfp_t gfp) @@ -180,13 +181,14 @@ void unmap_region(struct ma_state *mas, struct vm_area_struct *vma, struct vm_area_struct *prev, struct vm_area_struct *next); /* We are about to modify the VMA's flags. */ -struct vm_area_struct *vma_modify_flags(struct vma_iterator *vmi, +__must_check struct vm_area_struct +*vma_modify_flags(struct vma_iterator *vmi, struct vm_area_struct *prev, struct vm_area_struct *vma, unsigned long start, unsigned long end, unsigned long new_flags); /* We are about to modify the VMA's flags and/or anon_name. */ -struct vm_area_struct +__must_check struct vm_area_struct *vma_modify_flags_name(struct vma_iterator *vmi, struct vm_area_struct *prev, struct vm_area_struct *vma, @@ -196,7 +198,7 @@ struct vm_area_struct struct anon_vma_name *new_name); /* We are about to modify the VMA's memory policy. */ -struct vm_area_struct +__must_check struct vm_area_struct *vma_modify_policy(struct vma_iterator *vmi, struct vm_area_struct *prev, struct vm_area_struct *vma, @@ -204,19 +206,22 @@ struct vm_area_struct struct mempolicy *new_pol); /* We are about to modify the VMA's flags and/or uffd context. */ -struct vm_area_struct +__must_check struct vm_area_struct *vma_modify_flags_uffd(struct vma_iterator *vmi, struct vm_area_struct *prev, struct vm_area_struct *vma, unsigned long start, unsigned long end, unsigned long new_flags, - struct vm_userfaultfd_ctx new_ctx); + struct vm_userfaultfd_ctx new_ctx, + bool give_up_on_oom); -struct vm_area_struct *vma_merge_new_range(struct vma_merge_struct *vmg); +__must_check struct vm_area_struct +*vma_merge_new_range(struct vma_merge_struct *vmg); -struct vm_area_struct *vma_merge_extend(struct vma_iterator *vmi, - struct vm_area_struct *vma, - unsigned long delta); +__must_check struct vm_area_struct +*vma_merge_extend(struct vma_iterator *vmi, + struct vm_area_struct *vma, + unsigned long delta); void unlink_file_vma_batch_init(struct unlink_vma_file_batch *vb); @@ -243,10 +248,16 @@ bool vma_wants_writenotify(struct vm_area_struct *vma, pgprot_t vm_page_prot); int mm_take_all_locks(struct mm_struct *mm); void mm_drop_all_locks(struct mm_struct *mm); -unsigned long __mmap_region(struct file *file, unsigned long addr, +unsigned long mmap_region(struct file *file, unsigned long addr, unsigned long len, vm_flags_t vm_flags, unsigned long pgoff, struct list_head *uf); +int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *brkvma, + unsigned long addr, unsigned long request, unsigned long flags); + +unsigned long unmapped_area(struct vm_unmapped_area_info *info); +unsigned long unmapped_area_topdown(struct vm_unmapped_area_info *info); + static inline bool vma_wants_manual_pte_write_upgrade(struct vm_area_struct *vma) { /* @@ -472,4 +483,12 @@ static inline bool can_modify_vma_madv(struct vm_area_struct *vma, int behavior) #endif +#if defined(CONFIG_STACK_GROWSUP) +int expand_upwards(struct vm_area_struct *vma, unsigned long address); +#endif + +int expand_downwards(struct vm_area_struct *vma, unsigned long address); + +int __vm_munmap(unsigned long start, size_t len, bool unlock); + #endif /* __MM_VMA_H */ |