filelock: fl_pid field should be signed int

This field has been unsigned for a very long time, but most users of the
struct file_lock and the file locking internals themselves treat it as a
signed value. Change it to be pid_t (which is a signed int).

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/r/20240131-flsplit-v3-1-c6129007ee8d@kernel.org
Reviewed-by: NeilBrown <neilb@suse.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/include/linux/filelock.h b/include/linux/filelock.h
index 95e868e09e298bb70ca23ec760d1c00fdb07201e..085ff6ba06536d39ff0489bb9d548d93759abe03 100644 (file)
--- a/include/linux/filelock.h
+++ b/include/linux/filelock.h
@@ -98,7 +98,7 @@ struct file_lock {
        fl_owner_t fl_owner;
        unsigned int fl_flags;
        unsigned char fl_type;
-       unsigned int fl_pid;
+       pid_t fl_pid;
        int fl_link_cpu;                /* what cpu's list is this on? */
        wait_queue_head_t fl_wait;
        struct file *fl_file;