[PATCH] ppc32: fix CONFIG_TASK_SIZE handling on 40x

This patch is virtually identical to my previous 44x one.  It removes
0x8000'0000 TASK_SIZE hardcoded assumption from head_4xx.S.

Signed-off-by: Eugene Surovegin <ebs@ebshome.net>
Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/ppc/kernel/head_4xx.S b/arch/ppc/kernel/head_4xx.S
index 6f5d380..23fb518 100644 (file)
--- a/arch/ppc/kernel/head_4xx.S
+++ b/arch/ppc/kernel/head_4xx.S
@@ -291,8 +291,9 @@ label:
        /* If we are faulting a kernel address, we have to use the
         * kernel page tables.
         */
-       andis.  r11, r10, 0x8000
-       beq     3f
+       lis     r11, TASK_SIZE@h
+       cmplw   r10, r11
+       blt+    3f
        lis     r11, swapper_pg_dir@h
        ori     r11, r11, swapper_pg_dir@l
        li      r9, 0
@@ -479,8 +480,9 @@ label:
        /* If we are faulting a kernel address, we have to use the
         * kernel page tables.
         */
-       andis.  r11, r10, 0x8000
-       beq     3f
+       lis     r11, TASK_SIZE@h
+       cmplw   r10, r11
+       blt+    3f
        lis     r11, swapper_pg_dir@h
        ori     r11, r11, swapper_pg_dir@l
        li      r9, 0
@@ -578,8 +580,9 @@ label:
        /* If we are faulting a kernel address, we have to use the
         * kernel page tables.
         */
-       andis.  r11, r10, 0x8000
-       beq     3f
+       lis     r11, TASK_SIZE@h
+       cmplw   r10, r11
+       blt+    3f
        lis     r11, swapper_pg_dir@h
        ori     r11, r11, swapper_pg_dir@l
        li      r9, 0