USB: get rid of urb->lock

Now that urb->status isn't used, urb->lock doesn't protect anything.
This patch (as980) removes it and replaces it with a private mutex in
the one remaining place it was still used: usb_kill_urb.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 4 deletions

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 5c7b79088add..5b14b4c81fd6 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1241,7 +1241,6 @@ struct urb
 {
         /* private: usb core and host controller only fields in the urb */
         struct kref kref;               /* reference count of the URB */
-        spinlock_t lock;                /* lock for the URB */
         void *hcpriv;                   /* private data for host controller */
         atomic_t use_count;             /* concurrent submissions counter */
         u8 reject;                      /* submissions will fail */
@@ -1299,7 +1298,6 @@ static inline void usb_fill_control_urb (struct urb *urb,
                                          usb_complete_t complete_fn,
                                          void *context)
 {
-        spin_lock_init(&urb->lock);
         urb->dev = dev;
         urb->pipe = pipe;
         urb->setup_packet = setup_packet;
@@ -1330,7 +1328,6 @@ static inline void usb_fill_bulk_urb (struct urb *urb,
                                       usb_complete_t complete_fn,
                                       void *context)
 {
-        spin_lock_init(&urb->lock);
         urb->dev = dev;
         urb->pipe = pipe;
         urb->transfer_buffer = transfer_buffer;
@@ -1366,7 +1363,6 @@ static inline void usb_fill_int_urb (struct urb *urb,
                                      void *context,
                                      int interval)
 {
-        spin_lock_init(&urb->lock);
         urb->dev = dev;
         urb->pipe = pipe;
         urb->transfer_buffer = transfer_buffer;