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-rw-r--r--arch/powerpc/kernel/vector.S10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/vector.S b/arch/powerpc/kernel/vector.S
index 4d5a3edff49e..e830289d2e48 100644
--- a/arch/powerpc/kernel/vector.S
+++ b/arch/powerpc/kernel/vector.S
@@ -89,6 +89,16 @@ _GLOBAL(load_up_altivec)
/* restore registers and return */
blr
+_GLOBAL(giveup_altivec_notask)
+ mfmsr r3
+ andis. r4,r3,MSR_VEC@h
+ bnelr /* Already enabled? */
+ oris r3,r3,MSR_VEC@h
+ SYNC
+ MTMSRD(r3) /* enable use of VMX now */
+ isync
+ blr
+
/*
* giveup_altivec(tsk)
* Disable VMX for the task given as the argument,