[PATCH] lockdep: annotate 3c59x.c disable_irq()

3c59x.c's vortex_timer() function knows that vp->lock can only be used by an
irq context that it disabled - and can hence take the vp->lock without
disabling hardirqs.  Teach lockdep about this.

Has no effect on non-lockdep kernels.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/net/3c59x.c b/drivers/net/3c59x.c
index 8ab03b4..2819de7 100644 (file)
--- a/drivers/net/3c59x.c
+++ b/drivers/net/3c59x.c
@@ -1897,7 +1897,7 @@ vortex_timer(unsigned long data)
                printk(KERN_DEBUG "dev->watchdog_timeo=%d\n", dev->watchdog_timeo);
        }
 
-       disable_irq(dev->irq);
+       disable_irq_lockdep(dev->irq);
        old_window = ioread16(ioaddr + EL3_CMD) >> 13;
        EL3WINDOW(4);
        media_status = ioread16(ioaddr + Wn4_Media);
@@ -1978,7 +1978,7 @@ leave_media_alone:
                         dev->name, media_tbl[dev->if_port].name);
 
        EL3WINDOW(old_window);
-       enable_irq(dev->irq);
+       enable_irq_lockdep(dev->irq);
        mod_timer(&vp->timer, RUN_AT(next_tick));
        if (vp->deferred)
                iowrite16(FakeIntr, ioaddr + EL3_CMD);