[PATCH 01/14] btrfs: optimize out btrfs_is_zoned for !CONFIG_BLK_DEV_ZONED

From: Christoph Hellwig <hch@lst.de>
To: Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
	David Sterba <dsterba@suse.com>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>,
	Naohiro Aota <naohiro.aota@wdc.com>,
	linux-btrfs@vger.kernel.org
Subject: [PATCH 01/14] btrfs: optimize out btrfs_is_zoned for !CONFIG_BLK_DEV_ZONED
Date: Wed, 24 May 2023 17:03:04 +0200	[thread overview]
Message-ID: <20230524150317.1767981-2-hch@lst.de> (raw)
In-Reply-To: <20230524150317.1767981-1-hch@lst.de>

Add an IS_ENABLED check for CONFIG_BLK_DEV_ZONED in addition to the
run-time check for the zone size.  This will allows to make use of
compiler dead code elimination for code guarded by btrfs_is_zoned, and
for example provide just a dangling prototype for a function instead
of adding a stub.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/btrfs/fs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/fs.h b/fs/btrfs/fs.h
index 840e4def18b519..5dd24c2916a1f3 100644
--- a/fs/btrfs/fs.h
+++ b/fs/btrfs/fs.h
@@ -853,7 +853,7 @@ static inline u64 btrfs_calc_metadata_size(const struct btrfs_fs_info *fs_info,
 
 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
 {
-	return fs_info->zone_size > 0;
+	return IS_ENABLED(CONFIG_BLK_DEV_ZONED) && fs_info->zone_size > 0;
 }
 
 /*
-- 
2.39.2

