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| author | Ingo Molnar <mingo@elte.hu> | 2009-04-14 11:32:23 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-14 11:32:30 +0200 |
| commit | 05cfbd66d07c44865983c8b65ae9d0037d874206 (patch) | |
| tree | 084b665cc97b47d1592fe76ea0a39a7753288a02 /drivers/virtio/virtio_ring.c | |
| parent | 31c9a24ec82926fcae49483e53566d231e705057 (diff) | |
| parent | ef631b0ca01655d24e9ca7e199262c4a46416a26 (diff) | |
| download | kernel-crypto-05cfbd66d07c44865983c8b65ae9d0037d874206.tar.gz kernel-crypto-05cfbd66d07c44865983c8b65ae9d0037d874206.tar.xz kernel-crypto-05cfbd66d07c44865983c8b65ae9d0037d874206.zip | |
Merge branch 'core/urgent' into core/rcu
Merge reason: new patches to be queued up depend on:
ef631b0: rcu: Make hierarchical RCU less IPI-happy
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/virtio/virtio_ring.c')
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 5777196bf6c..5c52369ab9b 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -23,15 +23,21 @@ #ifdef DEBUG /* For development, we want to crash whenever the ring is screwed. */ -#define BAD_RING(vq, fmt...) \ - do { dev_err(&vq->vq.vdev->dev, fmt); BUG(); } while(0) -#define START_USE(vq) \ - do { if ((vq)->in_use) panic("in_use = %i\n", (vq)->in_use); (vq)->in_use = __LINE__; mb(); } while(0) -#define END_USE(vq) \ - do { BUG_ON(!(vq)->in_use); (vq)->in_use = 0; mb(); } while(0) +#define BAD_RING(_vq, fmt...) \ + do { dev_err(&(_vq)->vq.vdev->dev, fmt); BUG(); } while(0) +/* Caller is supposed to guarantee no reentry. */ +#define START_USE(_vq) \ + do { \ + if ((_vq)->in_use) \ + panic("in_use = %i\n", (_vq)->in_use); \ + (_vq)->in_use = __LINE__; \ + mb(); \ + } while(0) +#define END_USE(_vq) \ + do { BUG_ON(!(_vq)->in_use); (_vq)->in_use = 0; mb(); } while(0) #else -#define BAD_RING(vq, fmt...) \ - do { dev_err(&vq->vq.vdev->dev, fmt); (vq)->broken = true; } while(0) +#define BAD_RING(_vq, fmt...) \ + do { dev_err(&_vq->vq.vdev->dev, fmt); (_vq)->broken = true; } while(0) #define START_USE(vq) #define END_USE(vq) #endif |