Use dax_is_supported() to validate whether the architecture has
virtually aliased caches at mount time.
This is relevant for architectures which require a dynamic check
to validate whether they have virtually aliased data caches
(ARCH_HAS_CACHE_ALIASING_DYNAMIC=y).
Fixes: d92576f1167c ("dax: does not work correctly with virtual aliasing
caches")
Signed-off-by: Mathieu Desnoyers <[email protected]>
Cc: "Theodore Ts'o" <[email protected]>
Cc: Andreas Dilger <[email protected]>
Cc: [email protected]
Cc: Andrew Morton <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Dan Williams <[email protected]>
Cc: Vishal Verma <[email protected]>
Cc: Dave Jiang <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: [email protected]
Cc: [email protected]
---
fs/ext4/super.c | 52 ++++++++++++++++++++++++-------------------------
1 file changed, 25 insertions(+), 27 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c5fcf377ab1f..9e0606289239 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2359,34 +2359,32 @@ static int ext4_parse_param(struct fs_context *fc,
struct fs_parameter *param)
return ext4_parse_test_dummy_encryption(param, ctx);
case Opt_dax:
case Opt_dax_type:
-#ifdef CONFIG_FS_DAX
- {
- int type = (token == Opt_dax) ?
- Opt_dax : result.uint_32;
-
- switch (type) {
- case Opt_dax:
- case Opt_dax_always:
- ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
- ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER);
- break;
- case Opt_dax_never:
- ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER);
- ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
- break;
- case Opt_dax_inode:
- ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
- ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER);
- /* Strictly for printing options */
- ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE);
- break;
+ if (dax_is_supported()) {
+ int type = (token == Opt_dax) ?
+ Opt_dax : result.uint_32;
+
+ switch (type) {
+ case Opt_dax:
+ case Opt_dax_always:
+ ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
+ ctx_clear_mount_opt2(ctx,
EXT4_MOUNT2_DAX_NEVER);
+ break;
+ case Opt_dax_never:
+ ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER);
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
+ break;
+ case Opt_dax_inode:
+ ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
+ ctx_clear_mount_opt2(ctx,
EXT4_MOUNT2_DAX_NEVER);
+ /* Strictly for printing options */
+ ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE);
+ break;
+ }
+ return 0;
+ } else {
+ ext4_msg(NULL, KERN_INFO, "dax option not supported");
+ return -EINVAL;
}
- return 0;
- }
-#else
- ext4_msg(NULL, KERN_INFO, "dax option not supported");
- return -EINVAL;
-#endif
case Opt_data_err:
if (result.uint_32 == Opt_data_err_abort)
ctx_set_mount_opt(ctx, m->mount_opt);
--
2.39.2
