powerpc/ftrace: Fix assembly trampoline register usage

Just like the module loader, ftrace needs to be updated to use r12
instead of r11 with newer gcc's.

Signed-off-by: Roger Blofeld <blofeldus@yahoo.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: stable@vger.kernel.org

1 files changed, 6 insertions, 6 deletions

diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 6f33296a0570..91b46b7f6f0d 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -240,9 +240,9 @@ __ftrace_make_nop(struct module *mod,
 
         /*
          * On PPC32 the trampoline looks like:
-         *  0x3d, 0x60, 0x00, 0x00  lis r11,sym@ha
-         *  0x39, 0x6b, 0x00, 0x00  addi r11,r11,sym@l
-         *  0x7d, 0x69, 0x03, 0xa6  mtctr r11
+         *  0x3d, 0x80, 0x00, 0x00  lis r12,sym@ha
+         *  0x39, 0x8c, 0x00, 0x00  addi r12,r12,sym@l
+         *  0x7d, 0x89, 0x03, 0xa6  mtctr r12
          *  0x4e, 0x80, 0x04, 0x20  bctr
          */
 
@@ -257,9 +257,9 @@ __ftrace_make_nop(struct module *mod,
         pr_devel(" %08x %08x ", jmp[0], jmp[1]);
 
         /* verify that this is what we expect it to be */
-        if (((jmp[0] & 0xffff0000) != 0x3d600000) ||
-            ((jmp[1] & 0xffff0000) != 0x396b0000) ||
-            (jmp[2] != 0x7d6903a6) ||
+        if (((jmp[0] & 0xffff0000) != 0x3d800000) ||
+            ((jmp[1] & 0xffff0000) != 0x398c0000) ||
+            (jmp[2] != 0x7d8903a6) ||
             (jmp[3] != 0x4e800420)) {
                 printk(KERN_ERR "Not a trampoline\n");
                 return -EINVAL;