[PATCH] libxc: fix tracing (broken with hypercall buffers)

[Andre Przywara <andre.przywara@amd.com>]

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Hi,

the attached patch makes Xen tracing work again, after the introduction 
of the hypercall buffers broke it. Just a missing line.

Thanks to Uwe Dannowski for reporting this.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>

Regards,
Andre.

-- 
Andre Przywara
AMD-Operating System Research Center (OSRC), Dresden, Germany
Tel: +49 351 448-3567-12

[-- Attachment #2: libxc_fix_tracing_hypercall_buffers.patch --]
[-- Type: text/x-patch, Size: 417 bytes --]

diff -r 87f248de5230 tools/libxc/xc_tbuf.c
--- a/tools/libxc/xc_tbuf.c	Mon Nov 15 09:31:38 2010 +0000
+++ b/tools/libxc/xc_tbuf.c	Tue Nov 16 10:11:39 2010 +0100
@@ -121,6 +121,7 @@
     uint64_t mask64 = mask;
 
     bytemap = xc_hypercall_buffer_alloc(xch, bytemap, sizeof(mask64));
+    if (bytemap == NULL)
     {
         PERROR("Could not allocate memory for xc_tbuf_set_cpu_mask hypercall");
         goto out;

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