[Xen-devel] [PATCH 17 of 18] libxc: do not lock VCPU context in xc_ia64_pv_recv_vcpu_context

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1286892402 -3600
# Node ID 21f32c40fc2da4842ab8e93e52149a2baf7b25b0
# Parent  d1501c6dca3f879287359cf9de877b86c32d2e95
libxc: do not lock VCPU context in xc_ia64_pv_recv_vcpu_context

xc_ia64_pv_recv_vcpu_context does not need to lock the ctxt buffer
since it calls xc_ia64_recv_vcpu_context which calls
xc_vcpu_setcontext which takes care of any necessary bouncing.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

diff -r d1501c6dca3f -r 21f32c40fc2d tools/libxc/ia64/xc_ia64_linux_restore.c
--- a/tools/libxc/ia64/xc_ia64_linux_restore.c  Tue Oct 12 15:06:42 2010 +0100
+++ b/tools/libxc/ia64/xc_ia64_linux_restore.c  Tue Oct 12 15:06:42 2010 +0100
@@ -246,12 +246,6 @@ xc_ia64_pv_recv_vcpu_context(xc_interfac
     vcpu_guest_context_any_t ctxt_any;
     vcpu_guest_context_t *ctxt = &ctxt_any.c;
 
-    if (lock_pages(&ctxt_any, sizeof(ctxt_any))) {
-        /* needed for build domctl, but might as well do early */
-        ERROR("Unable to lock_pages ctxt");
-        return -1;
-    }
-
     if (xc_ia64_recv_vcpu_context(xch, io_fd, dom, vcpu, &ctxt_any))
         goto out;
 
@@ -264,7 +258,6 @@ xc_ia64_pv_recv_vcpu_context(xc_interfac
     rc = 0;
 
  out:
-    unlock_pages(&ctxt, sizeof(ctxt));
     return rc;
 }
 

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