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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-04-08 00:34:16 +0400 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-04-08 00:34:16 +0400 |
| commit | 38f4b8c0da01ae7cd9b93386842ce272d6fde9ab (patch) | |
| tree | 3c8c52201aac038094bfea7efdd0984a8f62045e /drivers/virtio/virtio_ring.c | |
| parent | a811454027352c762e0d5bba1b1d8f7d26bf96ae (diff) | |
| parent | 8e2c4f2844c0e8dcdfe312e5f2204854ca8532c6 (diff) | |
| download | linux-38f4b8c0da01ae7cd9b93386842ce272d6fde9ab.tar.xz | |
Merge commit 'origin/master' into for-linus/xen/master
* commit 'origin/master': (4825 commits)
Fix build errors due to CONFIG_BRANCH_TRACER=y
parport: Use the PCI IRQ if offered
tty: jsm cleanups
Adjust path to gpio headers
KGDB_SERIAL_CONSOLE check for module
Change KCONFIG name
tty: Blackin CTS/RTS
Change hardware flow control from poll to interrupt driven
Add support for the MAX3100 SPI UART.
lanana: assign a device name and numbering for MAX3100
serqt: initial clean up pass for tty side
tty: Use the generic RS485 ioctl on CRIS
tty: Correct inline types for tty_driver_kref_get()
splice: fix deadlock in splicing to file
nilfs2: support nanosecond timestamp
nilfs2: introduce secondary super block
nilfs2: simplify handling of active state of segments
nilfs2: mark minor flag for checkpoint created by internal operation
nilfs2: clean up sketch file
nilfs2: super block operations fix endian bug
...
Conflicts:
arch/x86/include/asm/thread_info.h
arch/x86/lguest/boot.c
drivers/xen/manage.c
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 5777196bf6c9..5c52369ab9bb 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 |