diff options
| -rw-r--r-- | mm/fadvise.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/mm/fadvise.c b/mm/fadvise.c index 0df4c899e979..3c0f1e99f5e4 100644 --- a/mm/fadvise.c +++ b/mm/fadvise.c @@ -49,9 +49,21 @@ asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice) goto out; } - if (mapping->a_ops->get_xip_page) - /* no bad return value, but ignore advice */ + if (mapping->a_ops->get_xip_page) { + switch (advice) { + case POSIX_FADV_NORMAL: + case POSIX_FADV_RANDOM: + case POSIX_FADV_SEQUENTIAL: + case POSIX_FADV_WILLNEED: + case POSIX_FADV_NOREUSE: + case POSIX_FADV_DONTNEED: + /* no bad return value, but ignore advice */ + break; + default: + ret = -EINVAL; + } goto out; + } /* Careful about overflows. Len == 0 means "as much as possible" */ endbyte = offset + len; |