diff options
| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-02-03 10:26:10 +0300 |
|---|---|---|
| committer | Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-02-03 10:26:10 +0300 |
| commit | d121f07691415df824e6b60520f782f6d13b3c81 (patch) | |
| tree | 422ad3cc6fd631604fef4e469e49bacba8202e52 /drivers/dax/super.c | |
| parent | 59858d3d54cfad1f8db67c2c07e4dd33bb6ed955 (diff) | |
| parent | 569d0365f571fa6421a5c80bc30d1b2cdab857fe (diff) | |
| download | linux-d121f07691415df824e6b60520f782f6d13b3c81.tar.xz | |
Merge branch 'for-4.16/dax' into libnvdimm-for-next
Diffstat (limited to 'drivers/dax/super.c')
| -rw-r--r-- | drivers/dax/super.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 3ec804672601..473af694ad1c 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -15,6 +15,7 @@ #include <linux/mount.h> #include <linux/magic.h> #include <linux/genhd.h> +#include <linux/pfn_t.h> #include <linux/cdev.h> #include <linux/hash.h> #include <linux/slab.h> @@ -123,6 +124,15 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize) return len < 0 ? len : -EIO; } + if ((IS_ENABLED(CONFIG_FS_DAX_LIMITED) && pfn_t_special(pfn)) + || pfn_t_devmap(pfn)) + /* pass */; + else { + pr_debug("VFS (%s): error: dax support not enabled\n", + sb->s_id); + return -EOPNOTSUPP; + } + return 0; } EXPORT_SYMBOL_GPL(__bdev_dax_supported); |