On Sun, Nov 20, 2022 at 03:59:57PM -0500, Jeff Layton wrote: > Move the file locking definitions to a new header file, and add the > appropriate #include directives to the source files that need them. By > doing this we trim down fs.h a bit and limit the amount of rebuilding > that has to be done when we make changes to the file locking APIs. I'm in favour of this in general, but I think there's a few implicit includes. Can you create a test.c that only #include <linnux/filelock.h> and see if there's anything missing? > + wait_queue_head_t fl_wait; > + struct file *fl_file; These two seem undefined at this point. > + struct fasync_struct * fl_fasync; /* for lease break notifications */ Likewise.