diff options
Diffstat (limited to 'mm/util.c')
| -rw-r--r-- | mm/util.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mm/util.c b/mm/util.c index 3bf81b294ae8..b377ce430803 100644 --- a/mm/util.c +++ b/mm/util.c @@ -280,9 +280,24 @@ SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, unsigned long retval = -EBADF; if (!(flags & MAP_ANONYMOUS)) { + if (unlikely(flags & MAP_HUGETLB)) + return -EINVAL; file = fget(fd); if (!file) goto out; + } else if (flags & MAP_HUGETLB) { + struct user_struct *user = NULL; + /* + * 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); } flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |