[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG code

* Cleanup the code a bit my allocating an INT_FRAME on our exception
  stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to
  just GPR11(r8)
* simplify {lvl}_transfer_to_handler code by moving the copying of the
  temp registers we use if we come from user space into the PROLOG
* If the exception came from kernel mode copy thread_info flags,
  preempt, and task pointer from the process thread_info.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 13 deletions

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 888a364043a8..c94aba54b5dd 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -44,29 +44,16 @@
 #endif
 
 #ifdef CONFIG_BOOKE
-#include "head_booke.h"
-#define TRANSFER_TO_HANDLER_EXC_LEVEL(exc_level)        \
-        mtspr   exc_level##_SPRG,r8;                    \
-        BOOKE_LOAD_EXC_LEVEL_STACK(exc_level);          \
-        lwz     r0,GPR10-INT_FRAME_SIZE(r8);            \
-        stw     r0,GPR10(r11);                          \
-        lwz     r0,GPR11-INT_FRAME_SIZE(r8);            \
-        stw     r0,GPR11(r11);                          \
-        mfspr   r8,exc_level##_SPRG
-
         .globl  mcheck_transfer_to_handler
 mcheck_transfer_to_handler:
-        TRANSFER_TO_HANDLER_EXC_LEVEL(MCHECK)
         b       transfer_to_handler_full
 
         .globl  debug_transfer_to_handler
 debug_transfer_to_handler:
-        TRANSFER_TO_HANDLER_EXC_LEVEL(DEBUG)
         b       transfer_to_handler_full
 
         .globl  crit_transfer_to_handler
 crit_transfer_to_handler:
-        TRANSFER_TO_HANDLER_EXC_LEVEL(CRIT)
         /* fall through */
 #endif