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[77.7.4.134]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-480021e8c5asm16200335f8f.18.2026.08.08.05.39.24 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sat, 08 Aug 2026 05:39:24 -0700 (PDT) From: Karl Mehltretter To: Christian Brauner , Alexander Viro Cc: Karl Mehltretter , Jan Kara , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH] super: fix dying superblock warning messages Date: Sat, 8 Aug 2026 14:38:02 +0200 Message-Id: <20260808123802.73687-1-kmehltretter@gmail.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- 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; =20 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_ho= lder 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); --=20 2.39.5 (Apple Git-154)