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authorRusty Russell <rusty@rustcorp.com.au>2008-12-30 09:25:58 -0600
committerRusty Russell <rusty@rustcorp.com.au>2008-12-30 09:26:02 +1030
commit2966af73e70dee461c256b5eb877b2ff757f8c82 (patch)
tree5cb8a81e80cb9b513fad015f0dc4d5e5db52fd14 /include/linux/lguest_launcher.h
parent498af14783935af487d17dbee4ac451783cbc2b7 (diff)
virtio: use LGUEST_VRING_ALIGN instead of relying on pagesize
This doesn't really matter, since lguest is i386 only at the moment, but we could actually choose a different value. (lguest doesn't have a guarenteed ABI). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/lguest_launcher.h')
-rw-r--r--include/linux/lguest_launcher.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/lguest_launcher.h b/include/linux/lguest_launcher.h
index e7217dc58f39..bd0eba760522 100644
--- a/include/linux/lguest_launcher.h
+++ b/include/linux/lguest_launcher.h
@@ -59,4 +59,8 @@ enum lguest_req
LHREQ_IRQ, /* + irq */
LHREQ_BREAK, /* + on/off flag (on blocks until someone does off) */
};
+
+/* The alignment to use between consumer and producer parts of vring.
+ * x86 pagesize for historical reasons. */
+#define LGUEST_VRING_ALIGN 4096
#endif /* _LINUX_LGUEST_LAUNCHER */