vfs, swap: compile out IS_SWAPFILE() on swapless configs

No swap support -- no swapfiles possible.

Signed-off-by: Alexey Dobriyan (Yandex) <adobriyan@gmail.com>
Link: https://lore.kernel.org/r/2391c7f5-0f83-4188-ae56-4ec7ccbf2576@p183
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/include/linux/fs.h b/include/linux/fs.h
index b053f98393e66a433a39c100669ae1352299729e..d376dd7057d53c255d2b45eabc1b876a2d8f5188 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2260,7 +2260,13 @@ static inline bool sb_rdonly(const struct super_block *sb) { return sb->s_flags
 
 #define IS_DEADDIR(inode)      ((inode)->i_flags & S_DEAD)
 #define IS_NOCMTIME(inode)     ((inode)->i_flags & S_NOCMTIME)
+
+#ifdef CONFIG_SWAP
 #define IS_SWAPFILE(inode)     ((inode)->i_flags & S_SWAPFILE)
+#else
+#define IS_SWAPFILE(inode)     ((void)(inode), 0U)
+#endif
+
 #define IS_PRIVATE(inode)      ((inode)->i_flags & S_PRIVATE)
 #define IS_IMA(inode)          ((inode)->i_flags & S_IMA)
 #define IS_AUTOMOUNT(inode)    ((inode)->i_flags & S_AUTOMOUNT)