[POWERPC] Add cpu feature for SPE handling

Make it so that SPE support can be determined at runtime.  This is similiar
to how we handle AltiVec.  This allows us to have SPE support built in and
work on processors with and without SPE.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 2 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 8a177bd9eab4..fb8866e0e35d 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -576,8 +576,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 #ifdef CONFIG_SPE
         case PTRACE_GETEVRREGS:
                 /* Get the child spe register state. */
-                if (child->thread.regs->msr & MSR_SPE)
-                        giveup_spe(child);
+                flush_spe_to_thread(child);
                 ret = get_evrregs((unsigned long __user *)data, child);
                 break;
 
@@ -585,8 +584,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 /* Set the child spe register state. */
                 /* this is to clear the MSR_SPE bit to force a reload
                  * of register state from memory */
-                if (child->thread.regs->msr & MSR_SPE)
-                        giveup_spe(child);
+                flush_spe_to_thread(child);
                 ret = set_evrregs(child, (unsigned long __user *)data);
                 break;
 #endif