[Xen-devel] [PATCH] x86/mem_sharing: Relax sanity check for memops

[Tamas K Lengyel <tklengyel@xxxxxxxxxxxxx>]

The sharing vm_event ring being enabled is not necessary for mem_sharing
memops.

Signed-off-by: Tamas K Lengyel <tklengyel@xxxxxxxxxxxxx>
---
 xen/arch/x86/mm/mem_sharing.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c
index 0700f00..16e329e 100644
--- a/xen/arch/x86/mm/mem_sharing.c
+++ b/xen/arch/x86/mm/mem_sharing.c
@@ -1320,10 +1320,6 @@ int 
mem_sharing_memop(XEN_GUEST_HANDLE_PARAM(xen_mem_sharing_op_t) arg)
     if ( !hap_enabled(d) || !d->arch.hvm_domain.mem_sharing_enabled )
         goto out;
 
-    rc = -ENODEV;
-    if ( unlikely(!d->vm_event->share.ring_page) )
-        goto out;
-
     switch ( mso.op )
     {
         case XENMEM_sharing_op_nominate_gfn:
-- 
2.1.4


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