[PATCH] ppc32: fix CONFIG_TASK_SIZE handling on 44x

[Eugene Surovegin]

Hi!

This patch fixed CONFIG_TASK_SIZE handling on 44x. Currently 
head_44x.S hardcodes 0x80000000, which breaks if user chooses to 
change TASK_SIZE (e.g. for 3G user-space). Tested on Ocotea in 3G/1G 
configuration.

Signed-off-by: Eugene Surovegin <ebs at ebshome.net>

Index: arch/ppc/kernel/head_44x.S
===================================================================
--- 59c3218467807e1793fb4fc5d90141e072ab2212/arch/ppc/kernel/head_44x.S  (mode:100644)
+++ uncommitted/arch/ppc/kernel/head_44x.S  (mode:100644)
@@ -330,8 +330,9 @@
 	/* 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 at h
+	cmplw	r10, r11
+	blt+	3f
 	lis	r11, swapper_pg_dir at h
 	ori	r11, r11, swapper_pg_dir at l
 
@@ -464,8 +465,9 @@
 	/* 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 at h
+	cmplw	r10, r11
+	blt+	3f
 	lis	r11, swapper_pg_dir at h
 	ori	r11, r11, swapper_pg_dir at l
 
@@ -533,8 +535,9 @@
 	/* 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 at h 
+	cmplw	r10, r11
+	blt+	3f
 	lis	r11, swapper_pg_dir at h
 	ori	r11, r11, swapper_pg_dir at l