diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mmap.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 1aeef6625e6a..21d4029a07b3 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -949,6 +949,24 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr, if (mm->map_count > sysctl_max_map_count) return -ENOMEM; + if (flags & MAP_HUGETLB) { + struct user_struct *user = NULL; + if (file) + return -EINVAL; + + /* + * VM_NORESERVE is used because the reservations will be + * taken when vm_ops->mmap() is called + * A dummy user value is used because we are not locking + * memory so no accounting is necessary + */ + len = ALIGN(len, huge_page_size(&default_hstate)); + file = hugetlb_file_setup(HUGETLB_ANON_FILE, len, VM_NORESERVE, + &user, HUGETLB_ANONHUGE_INODE); + if (IS_ERR(file)) + return PTR_ERR(file); + } + /* Obtain the address to map to. we verify (or select) it and ensure * that it represents a valid section of the address space. */ |