diff options
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index d681a20eb4ea..ba990c20ecc2 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1848,7 +1848,7 @@ unacct_error: return error; } -unsigned long unmapped_area(struct vm_unmapped_area_info *info) +static unsigned long unmapped_area(struct vm_unmapped_area_info *info) { /* * We implement the search by looking for an rbtree node that @@ -1951,7 +1951,7 @@ found: return gap_start; } -unsigned long unmapped_area_topdown(struct vm_unmapped_area_info *info) +static unsigned long unmapped_area_topdown(struct vm_unmapped_area_info *info) { struct mm_struct *mm = current->mm; struct vm_area_struct *vma; @@ -2050,6 +2050,22 @@ found_highest: return gap_end; } +/* + * Search for an unmapped address range. + * + * We are looking for a range that: + * - does not intersect with any VMA; + * - is contained within the [low_limit, high_limit) interval; + * - is at least the desired size. + * - satisfies (begin_addr & align_mask) == (align_offset & align_mask) + */ +unsigned long vm_unmapped_area(struct vm_unmapped_area_info *info) +{ + if (info->flags & VM_UNMAPPED_AREA_TOPDOWN) + return unmapped_area_topdown(info); + else + return unmapped_area(info); +} #ifndef arch_get_mmap_end #define arch_get_mmap_end(addr) (TASK_SIZE) |