[PATCH 6.12.y 1/4] btrfs: add debug build only WARN

From: David Sterba <[email protected]>

[ Upstream commit 3db15c6ca6feb2c5000a1cbb39c33866e0349abd ]

Add conditional WARN() wrapper that's enabled only in debug build. It
should be used for unexpected conditions that should be noisy.  Use it
instead of ASSERT(0). As it will not lead to BUG() make sure that
continuing is still possible, e.g. the error is handled anyway.

Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: David Sterba <[email protected]>
Stable-dep-of: 8bc4d7209611 ("btrfs: zoned: fix missing chunk metadata reservation")
Signed-off-by: Sasha Levin <[email protected]>
---
 fs/btrfs/messages.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/btrfs/messages.h b/fs/btrfs/messages.h
index 08a9272399d26..66ea41aa36082 100644
--- a/fs/btrfs/messages.h
+++ b/fs/btrfs/messages.h
@@ -181,6 +181,13 @@ do {								\
 #define ASSERT(expr)	(void)(expr)
 #endif
 
+#ifdef CONFIG_BTRFS_DEBUG
+/* Verbose warning only under debug build. */
+#define DEBUG_WARN(args...)			WARN(1, KERN_ERR args)
+#else
+#define DEBUG_WARN(...)				do {} while(0)
+#endif
+
 __printf(5, 6)
 __cold
 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
-- 
2.53.0