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Subject[PATCH] filelock: always define for_each_file_lock()
..and eliminate the stub version when CONFIG_FILE_LOCKING is disabled.
This silences the following warning that crept in recently:

fs/ceph/locks.c: In function 'ceph_count_locks':
fs/ceph/locks.c:380:27: error: unused variable 'lock' [-Werror=unused-variable]
380 | struct file_lock *lock;

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202402062210.3YyBVGF1-lkp@intel.com/
Fixes: 75cabec0111b ("filelock: add some new helper functions")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
include/linux/filelock.h | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/include/linux/filelock.h b/include/linux/filelock.h
index aabd4bdf7eba..daee999d05f3 100644
--- a/include/linux/filelock.h
+++ b/include/linux/filelock.h
@@ -180,9 +180,6 @@ static inline void locks_wake_up(struct file_lock *fl)
wake_up(&fl->c.flc_wait);
}

-/* for walking lists of file_locks linked by fl_list */
-#define for_each_file_lock(_fl, _head) list_for_each_entry(_fl, _head, c.flc_list)
-
/* fs/locks.c */
void locks_free_lock_context(struct inode *inode);
void locks_free_lock(struct file_lock *fl);
@@ -283,8 +280,6 @@ static inline void locks_wake_up(struct file_lock *fl)
{
}

-#define for_each_file_lock(_fl, _head) while(false)
-
static inline void
locks_free_lock_context(struct inode *inode)
{
@@ -414,6 +409,9 @@ locks_inode_context(const struct inode *inode)

#endif /* !CONFIG_FILE_LOCKING */

+/* for walking lists of file_locks linked by fl_list */
+#define for_each_file_lock(_fl, _head) list_for_each_entry(_fl, _head, c.flc_list)
+
static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
{
return locks_lock_inode_wait(file_inode(filp), fl);
---
base-commit: 292fcaa1f937345cb65f3af82a1ee6692c8df9eb
change-id: 20240212-flsplit3-174effe3675a
Best regards,
--
Jeff Layton <jlayton@kernel.org>


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