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path: add cleanup helper

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Add a simple cleanup helper so we can cleanup struct path easily.
No need for any extra machinery. Avoid DEFINE_FREE() as it causes a
local copy of struct path to be used. Just rely on path_put() directly
called from a cleanup helper.

Link: https://lore.kernel.org/r/20240607-vfs-listmount-reverse-v1-2-7877a2bfa5e5@kernel.org
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2024-06-07 16:55:35 +02:00
parent 1613e604df
commit ff2c570ef7
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1 changed files with 9 additions and 0 deletions
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9
include/linux/path.h
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@ -24,4 +24,13 @@ static inline void path_put_init(struct path *path)
*path = (struct path) { };
}
/*
* Cleanup macro for use with __free(path_put). Avoids dereference and
* copying @path unlike DEFINE_FREE(). path_put() will handle the empty
* path correctly just ensure @path is initialized:
*
* struct path path __free(path_put) = {};
*/
#define __free_path_put path_put
#endif /* _LINUX_PATH_H */