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| author | Thomas Gleixner <tglx@linutronix.de> | 2013-08-21 14:44:54 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2013-08-21 14:44:54 +0200 |
| commit | fac778a2b8d6ca953d440baeee72901c2dd5aad9 (patch) | |
| tree | c43d780b5ff8819f4353b16c99601c5ceeeacad7 /include/xen/interface/io/ring.h | |
| parent | 07862c1cd6675cde2dd4bd64e64d704ea2185b79 (diff) | |
| parent | 94fc5d9de5bd757ad46f0d94bc4ebf617c4487f6 (diff) | |
| download | op-kernel-dev-fac778a2b8d6ca953d440baeee72901c2dd5aad9.zip op-kernel-dev-fac778a2b8d6ca953d440baeee72901c2dd5aad9.tar.gz | |
Merge branch 'linus' into timers/core
Reason: Get upstream changes on which new patches depend on.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/xen/interface/io/ring.h')
| -rw-r--r-- | include/xen/interface/io/ring.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/xen/interface/io/ring.h b/include/xen/interface/io/ring.h index 75271b9..7d28aff 100644 --- a/include/xen/interface/io/ring.h +++ b/include/xen/interface/io/ring.h @@ -188,6 +188,11 @@ struct __name##_back_ring { \ #define RING_REQUEST_CONS_OVERFLOW(_r, _cons) \ (((_cons) - (_r)->rsp_prod_pvt) >= RING_SIZE(_r)) +/* Ill-behaved frontend determination: Can there be this many requests? */ +#define RING_REQUEST_PROD_OVERFLOW(_r, _prod) \ + (((_prod) - (_r)->rsp_prod_pvt) > RING_SIZE(_r)) + + #define RING_PUSH_REQUESTS(_r) do { \ wmb(); /* back sees requests /before/ updated producer index */ \ (_r)->sring->req_prod = (_r)->req_prod_pvt; \ |
