Re: [libvirt] [PATCH] libxl: don't break the build on Xen>=4.5 because of libxl_vcpu_setaffinity()

libxl interface for vcpu pinning is changing in Xen 4.5. Basically, libxl_set_vcpuaffinity() now wants one more parameter. That is representative of 'VCPU soft affinity', which libvirt does not use. To mark such change, the macro LIBXL_HAVE_VCPUINFO_SOFT_AFFINITY is defined. Use it as a gate and, if present, re-#define the calls from the old to the new interface, to avoid breaking the build.

Signed-off-by: Dario Faggioli <dario.faggioli(a)citrix.com&gt; Cc: Jim Fehlig <jfehlig(a)suse.com&gt; Cc: Ian Campbell <Ian.Campbell(a)citrix.com&gt; Cc: Ian Jackson <Ian.Jackson(a)eu.citrix.com&gt; --- src/libxl/libxl_conf.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/src/libxl/libxl_conf.h b/src/libxl/libxl_conf.h index 6aa36d2..da66b4e 100644 --- a/src/libxl/libxl_conf.h +++ b/src/libxl/libxl_conf.h @@ -55,6 +55,17 @@ # define LIBXL_DUMP_DIR LIBXL_LIB_DIR "/dump" # define LIBXL_BOOTLOADER_PATH BINDIR "/pygrub" +/* libxl interface for setting VCPU affinity changed in 4.5. In fact, a new + * parameter has been added, representative of 'VCPU soft affinity'. If one + * does not care about it (and that's libvirt case), passing NULL is the + * right thing to do. To mark that change, LIBXL_HAVE_VCPUINFO_SOFT_AFFINITY + * is defined. */ +# ifdef LIBXL_HAVE_VCPUINFO_SOFT_AFFINITY +# define libxl_set_vcpuaffinity(ctx, domid, vcpuid, map) \ + libxl_set_vcpuaffinity((ctx), (domid), (vcpuid), (map), NULL) +# define libxl_set_vcpuaffinity_all(ctx, domid, max_vcpus, map) \ + libxl_set_vcpuaffinity_all((ctx), (domid), (max_vcpus), (map), NULL) +# endif typedef struct _libxlDriverPrivate libxlDriverPrivate; typedef libxlDriverPrivate *libxlDriverPrivatePtr;