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 <mathieu.desnoyers@xxxxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxxx>
Cc: linux-ext4@xxxxxxxxxxxxxxx
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: nvdimm@xxxxxxxxxxxxxxx
Cc: linux-cxl@xxxxxxxxxxxxxxx
---
fs/ext2/super.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 01f9addc8b1f..0398e7a90eb6 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -585,13 +585,13 @@ static int parse_options(char *options, struct super_block *sb,
set_opt(opts->s_mount_opt, XIP);
fallthrough;
case Opt_dax:
-#ifdef CONFIG_FS_DAX
- ext2_msg(sb, KERN_WARNING,
- "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
- set_opt(opts->s_mount_opt, DAX);
-#else
- ext2_msg(sb, KERN_INFO, "dax option not supported");
-#endif
+ if (dax_is_supported()) {
+ ext2_msg(sb, KERN_WARNING,
+ "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
+ set_opt(opts->s_mount_opt, DAX);
+ } else {
+ ext2_msg(sb, KERN_INFO, "dax option not supported");
+ }
break;
#if defined(CONFIG_QUOTA)
--
2.39.2
