diff options
Diffstat (limited to 'include/linux/mm_types.h')
| -rw-r--r-- | include/linux/mm_types.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 10a9a17342fc..b343741fbce5 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -255,6 +255,10 @@ struct vm_area_struct { * For areas with an address space and backing store, * linkage into the address_space->i_mmap interval tree, or * linkage of vma in the address_space->i_mmap_nonlinear list. + * + * For private anonymous mappings, a pointer to a null terminated string + * in the user process containing the name given to the vma, or NULL + * if unnamed. */ union { struct { @@ -262,6 +266,7 @@ struct vm_area_struct { unsigned long rb_subtree_last; } linear; struct list_head nonlinear; + const char __user *anon_name; } shared; /* @@ -506,4 +511,13 @@ static inline void clear_tlb_flush_pending(struct mm_struct *mm) } #endif +/* Return the name for an anonymous mapping or NULL for a file-backed mapping */ +static inline const char __user *vma_get_anon_name(struct vm_area_struct *vma) +{ + if (vma->vm_file) + return NULL; + + return vma->shared.anon_name; +} + #endif /* _LINUX_MM_TYPES_H */ |