[PATCH] ext4: Fix mount failure with quota configured as module

[PATCH] ext4: Fix mount failure with quota configured as module

[Jan Kara]

When CONFIG_QFMT_V2 is configured as a module, the test in
ext4_feature_set_ok() fails and so mount of filesystems with quota or
project features fails. Fix the test to use IS_ENABLED macro which works
properly even for modules.

Fixes: d65d87a07476 ("ext4: improve explanation of a mount failure caused by a misconfigured kernel")
Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/ext4/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f464dff09774..576b69d2ca41 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3009,7 +3009,7 @@ static int ext4_feature_set_ok(struct super_block *sb, int readonly)
 		return 0;
 	}
 
-#if !defined(CONFIG_QUOTA) || !defined(CONFIG_QFMT_V2)
+#if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2)
 	if (!readonly && (ext4_has_feature_quota(sb) ||
 			  ext4_has_feature_project(sb))) {
 		ext4_msg(sb, KERN_ERR,
-- 
2.16.4

Re: [PATCH] ext4: Fix mount failure with quota configured as module

[Theodore Y. Ts'o]

On Fri, Feb 21, 2020 at 11:08:35AM +0100, Jan Kara wrote:
> When CONFIG_QFMT_V2 is configured as a module, the test in
> ext4_feature_set_ok() fails and so mount of filesystems with quota or
> project features fails. Fix the test to use IS_ENABLED macro which works
> properly even for modules.
> 
> Fixes: d65d87a07476 ("ext4: improve explanation of a mount failure caused by a misconfigured kernel")
> Signed-off-by: Jan Kara <jack@suse.cz>

Whoops, good catch.  Thanks, applied.

					- Ted