powerpc: don't mess with r2 in copy_thread() and friends

kernel_thread() callbacks are *not* in modules and are not going to
be there.  And it's not even read in ppc32 ret_from_kernel_thread(),
so no need to bother with it there either.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 0 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 2eb766ad1c5c..8fdb05146ca0 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -373,7 +373,6 @@ _GLOBAL(ret_from_fork)
 _GLOBAL(ret_from_kernel_thread)
         bl      .schedule_tail
         REST_NVGPRS(r1)
-        REST_GPR(2,r1)
         mtlr    r14
         mr      r3,r15
         blrl