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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-29 11:50:17 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-29 11:50:17 -0700 |
| commit | 9c5891bd4342349a200676d33f742dd1b864822c (patch) | |
| tree | b14c1698f2d8ce5276e1befd562f6398a46b48b9 /include/xen/interface/io/ring.h | |
| parent | ecda040ff3724f021a96491ecee88d48e968c153 (diff) | |
| parent | 5ae90d8e467e625e447000cb4335c4db973b1095 (diff) | |
Merge 3.11-rc3 into char-misc-next.
This resolves a merge issue with:
drivers/misc/mei/init.c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 75271b9a8f61..7d28aff605c7 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; \ |