diff options
| -rw-r--r-- | drivers/dax/super.c | 10 | ||||
| -rw-r--r-- | fs/Kconfig | 1 |
2 files changed, 10 insertions, 1 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 97ef2a9d878d..7643b1a078d9 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -451,6 +451,16 @@ struct dax_device *alloc_dax(void *private, const struct dax_operations *ops) dev_t devt; int minor; + /* + * Unavailable on architectures with virtually aliased data caches, + * except for device-dax (NULL operations pointer), which does + * not use aliased mappings from the kernel. + */ + if (ops && (IS_ENABLED(CONFIG_ARM) || + IS_ENABLED(CONFIG_MIPS) || + IS_ENABLED(CONFIG_SPARC))) + return ERR_PTR(-EOPNOTSUPP); + if (WARN_ON_ONCE(ops && !ops->zero_page_range)) return ERR_PTR(-EINVAL); diff --git a/fs/Kconfig b/fs/Kconfig index 89fdbefd1075..713c8655fa0a 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -60,7 +60,6 @@ endif # BLOCK config FS_DAX bool "File system based Direct Access (DAX) support" depends on MMU - depends on !(ARM || MIPS || SPARC) depends on ZONE_DEVICE || FS_DAX_LIMITED select FS_IOMAP select DAX |