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 6e0b286649f1..6c44170c4aca 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -274,6 +274,10 @@ 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 { @@ -281,6 +285,7 @@ struct vm_area_struct { unsigned long rb_subtree_last; } linear; struct list_head nonlinear; + const char __user *anon_name; } shared; /* @@ -525,4 +530,13 @@ enum tlb_flush_reason { NR_TLB_FLUSH_REASONS, }; +/* 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 */ |