ext4: introduce EXPORT_SYMBOL_FOR_EXT4_TEST() helper

Introduce EXPORT_SYMBOL_FOR_EXT4_TEST() helper for kuint test.

Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20260314075258.1317579-2-yebin@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

Author: Ye Bin

fs/ext4/ext4.h

@@ -3944,6 +3944,11 @@ static inline bool ext4_inode_can_atomic_write(struct inode *inode)
 extern int ext4_block_write_begin(handle_t *handle, struct folio *folio,
 				  loff_t pos, unsigned len,
 				  get_block_t *get_block);
+
+#if IS_ENABLED(CONFIG_EXT4_KUNIT_TESTS)
+#define EXPORT_SYMBOL_FOR_EXT4_TEST(sym) \
+	EXPORT_SYMBOL_FOR_MODULES(sym, "ext4-test")
+#endif
 #endif	/* __KERNEL__ */
 
 #endif	/* _EXT4_H */