[PATCH 1/4] KVM: PPC: BOOK3S: PR: Emulate virtual timebase register

[Alexander Graf]

On 05.06.14 14:08, Aneesh Kumar K.V wrote:
> virtual time base register is a per VM, per cpu register that needs
> to be saved and restored on vm exit and entry. Writing to VTB is not
> allowed in the privileged mode.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>

For some reason BUG() doesn't always trigger the "execution stops here" 
logic in gcc. So I've squashed this patch into yours.


Alex


diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 3e7085d..99de6ad 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -1206,6 +1206,7 @@ static inline unsigned long mfvtb (void)
       * capture that.
       */
      BUG();
+    return 0;
  }

  #ifdef __powerpc64__