diff options
| author | Thomas Gleixner <[email protected]> | 2016-09-01 16:33:46 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2016-09-01 16:33:46 +0000 |
| commit | 0cb7bf61b1e9f05027de58c80f9b46a714d24e35 (patch) | |
| tree | 41fb55cf62d07b425122f9a8b96412c0d8eb99c5 /mm/readahead.c | |
| parent | cpu/hotplug: Prevent alloc/free of irq descriptors during CPU up/down (again) (diff) | |
| parent | Linux 4.8-rc4 (diff) | |
| download | kernel-0cb7bf61b1e9f05027de58c80f9b46a714d24e35.tar.gz kernel-0cb7bf61b1e9f05027de58c80f9b46a714d24e35.zip | |
Merge branch 'linus' into smp/hotplug
Apply upstream changes to avoid conflicts with pending patches.
Diffstat (limited to 'mm/readahead.c')
| -rw-r--r-- | mm/readahead.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/mm/readahead.c b/mm/readahead.c index 65ec288dc057..c8a955b1297e 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -8,6 +8,7 @@ */ #include <linux/kernel.h> +#include <linux/dax.h> #include <linux/gfp.h> #include <linux/export.h> #include <linux/blkdev.h> @@ -544,6 +545,14 @@ do_readahead(struct address_space *mapping, struct file *filp, if (!mapping || !mapping->a_ops) return -EINVAL; + /* + * Readahead doesn't make sense for DAX inodes, but we don't want it + * to report a failure either. Instead, we just return success and + * don't do any work. + */ + if (dax_mapping(mapping)) + return 0; + return force_page_cache_readahead(mapping, filp, index, nr); } |