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| author | Linus Walleij <linus.walleij@linaro.org> | 2016-09-23 14:57:16 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-09-23 14:57:16 +0200 |
| commit | 0565f49cfe937640c2347f6d7f40ad2f4e4f088b (patch) | |
| tree | 6067447df39c37946bc2de3ee004f45957bf123e /mm/readahead.c | |
| parent | ccf1e9e1c0072088420aad42797986d6e74366b5 (diff) | |
| parent | 9395452b4aab7bc2475ef8935b4a4fb99d778d70 (diff) | |
| download | lwn-0565f49cfe937640c2347f6d7f40ad2f4e4f088b.tar.gz lwn-0565f49cfe937640c2347f6d7f40ad2f4e4f088b.zip | |
Merge tag 'v4.8-rc6' into devel
Linux 4.8-rc6
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); } |