[PATCH 4/6] libxc: allow for ctxt to be NULL in xc_vcpu_setcontext

From: Dario Faggioli <dario.faggioli@citrix.com>
To: xen-devel@lists.xen.org
Cc: George Dunlap <George.Dunlap@eu.citrix.com>,
	Ian Jackson <ian.jackson@eu.citrix.com>,
	Keir Fraser <keir@xen.org>,
	Ian Campbell <ian.campbell@citrix.com>,
	Jan Beulich <JBeulich@suse.com>
Subject: [PATCH 4/6] libxc: allow for ctxt to be NULL in xc_vcpu_setcontext
Date: Fri, 12 Jul 2013 18:48:24 +0200	[thread overview]
Message-ID: <20130712164824.14010.4817.stgit@hit-nxdomain.opendns.com> (raw)
In-Reply-To: <20130712163607.14010.39937.stgit@hit-nxdomain.opendns.com>

Since, as can be seen in xen/common/domctl.c, that is legitimate.
Actually, it is the only way to have vcpu_reset() invoked from
outside Xen.

Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: George Dunlap <George.Dunlap@eu.citrix.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Keir Fraser <keir@xen.org>
---
 tools/libxc/xc_domain.c |    6 ------
 1 file changed, 6 deletions(-)

diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
index d64d0bc..a247426 100644
--- a/tools/libxc/xc_domain.c
+++ b/tools/libxc/xc_domain.c
@@ -1140,12 +1140,6 @@ int xc_vcpu_setcontext(xc_interface *xch,
     DECLARE_HYPERCALL_BOUNCE(ctxt, sizeof(vcpu_guest_context_any_t), XC_HYPERCALL_BUFFER_BOUNCE_IN);
     int rc;
 
-    if (ctxt == NULL)
-    {
-        errno = EINVAL;
-        return -1;
-    }
-
     if ( xc_hypercall_bounce_pre(xch, ctxt) )
         return -1;
