[OE-core] [PATCH 1/2] base.bbclass: do not expand PREFERRED_PROVIDER for kernel recipe

[Dongxiao Xu]

With Richard's commit f9c36392, we only build one kernel for a system,
thus we shouldn't extend PREFERRED_PROVIDER for virtual/kernel.

[YOCTO #1471]

Signed-off-by: Dongxiao Xu <dongxiao.xu at intel.com>
---
 meta/classes/base.bbclass |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index 104bec8..4ca04e2 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -181,8 +181,10 @@ def preferred_ml_updates(d):
              virt = "virtual/"
         for p in prefixes:
             newname = "PREFERRED_PROVIDER_" + virt + p + "-" + pkg
+            if pkg != "kernel":
+                val = p + "-" + val
             if not d.getVar(newname, False):
-                d.setVar(newname, p + "-" + val)
+                d.setVar(newname, val)
 
 
     mp = (d.getVar("MULTI_PROVIDER_WHITELIST", True) or "").split()
-- 
1.7.1