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virtio: use LGUEST_VRING_ALIGN instead of relying on pagesize

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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>
This commit is contained in:
Rusty Russell 2008-12-30 09:25:58 -06:00
parent 498af14783
commit 2966af73e7
3 changed files with 8 additions and 4 deletions
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4
include/linux/lguest_launcher.h
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@ -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 */