diff options
Diffstat (limited to 'include/linux/dax.h')
| -rw-r--r-- | include/linux/dax.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/dax.h b/include/linux/dax.h index bf6258472e49..261944ec0887 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -261,6 +261,19 @@ static inline bool dax_mapping(struct address_space *mapping) return mapping->host && IS_DAX(mapping->host); } +/* + * Due to dax's memory and block duo personalities, hwpoison reporting + * takes into consideration which personality is presently visible. + * When dax acts like a block device, such as in block IO, an encounter of + * dax hwpoison is reported as -EIO. + * When dax acts like memory, such as in page fault, a detection of hwpoison + * is reported as -EHWPOISON which leads to VM_FAULT_HWPOISON. + */ +static inline int dax_mem2blk_err(int err) +{ + return (err == -EHWPOISON) ? -EIO : err; +} + #ifdef CONFIG_DEV_DAX_HMEM_DEVICES void hmem_register_resource(int target_nid, struct resource *r); #else |