[PATCH] super: fix dying superblock warning messages

[Karl Mehltretter]

WARN_ON_ONCE() takes a condition, not a message. The string literals
are always true, so the warnings still trigger but the messages are
never printed.

Use WARN_ONCE(1, ...) instead to print the messages and keep the
once-only behavior.

Found with a Coccinelle script. Clang's -Wstring-conversion also flags
such calls but is not enabled in kernel builds.

Fixes: f0cd988016f6 ("fs: massage locking helpers")
Assisted-by: Claude:claude-fable-5 coccinelle
Signed-off-by: Karl Mehltretter <kmehltretter@xxxxxxxxx>
---
 fs/super.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/super.c b/fs/super.c
index a8fd61136aaf..56efcf1c31da 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -2012,7 +2012,7 @@ int freeze_super(struct super_block *sb, enum freeze_holder who, const void *fre
 	int ret;
 
 	if (!super_lock_excl(sb)) {
-		WARN_ON_ONCE("Dying superblock while freezing!");
+		WARN_ONCE(1, "Dying superblock while freezing!");
 		return -EINVAL;
 	}
 	atomic_inc(&sb->s_active);
@@ -2176,7 +2176,7 @@ int thaw_super(struct super_block *sb, enum freeze_holder who,
 	       const void *freeze_owner)
 {
 	if (!super_lock_excl(sb)) {
-		WARN_ON_ONCE("Dying superblock while thawing!");
+		WARN_ONCE(1, "Dying superblock while thawing!");
 		return -EINVAL;
 	}
 	return thaw_super_locked(sb, who, freeze_owner);
-- 
2.39.5 (Apple Git-154)