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-rw-r--r--mm/fadvise.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/fadvise.c b/mm/fadvise.c
index a43013112581..702f239cd6db 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -52,7 +52,9 @@ SYSCALL_DEFINE4(fadvise64_64, int, fd, loff_t, offset, loff_t, len, int, advice)
goto out;
}
- if (IS_DAX(inode)) {
+ bdi = inode_to_bdi(mapping->host);
+
+ if (IS_DAX(inode) || (bdi == &noop_backing_dev_info)) {
switch (advice) {
case POSIX_FADV_NORMAL:
case POSIX_FADV_RANDOM:
@@ -75,8 +77,6 @@ SYSCALL_DEFINE4(fadvise64_64, int, fd, loff_t, offset, loff_t, len, int, advice)
else
endbyte--; /* inclusive */
- bdi = inode_to_bdi(mapping->host);
-
switch (advice) {
case POSIX_FADV_NORMAL:
f.file->f_ra.ra_pages = bdi->ra_pages;