powerpc/powernv: Don't clobber r9 in relative_toc()

With OPAL, r8 and r9 will be used to pass the OPAL base and entry
for debugging purposes (those informations are also in the
device-tree). We don't want to clobber those registers that
early.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 3564c49c683e1b870da4b7aa455e7155058526d5..e708abe576d3eb67f198e64dd6399967171be810 100644 (file)
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -674,9 +674,9 @@ _GLOBAL(enable_64b_mode)
 _GLOBAL(relative_toc)
        mflr    r0
        bcl     20,31,$+4
-0:     mflr    r9
-       ld      r2,(p_toc - 0b)(r9)
-       add     r2,r2,r9
+0:     mflr    r11
+       ld      r2,(p_toc - 0b)(r11)
+       add     r2,r2,r11
        mtlr    r0
        blr