Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
[PATCH] ppc32: fix CONFIG_TASK_SIZE handling on 44x
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@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>
authored by Matt Porter and committed by Linus Torvalds b2665f92 7f8cd80f
+9
-6
arch/ppc/kernel/head_44x.S
+9
-6
arch/ppc/kernel/head_44x.S
···
330
330
/* If we are faulting a kernel address, we have to use the
331
331
* kernel page tables.
332
332
*/
333
-
andis. r11, r10, 0x8000
334
-
beq 3f
333
+
lis r11, TASK_SIZE@h
334
+
cmplw r10, r11
335
+
blt+ 3f
335
336
lis r11, swapper_pg_dir@h
336
337
ori r11, r11, swapper_pg_dir@l
337
338
···
465
464
/* If we are faulting a kernel address, we have to use the
466
465
* kernel page tables.
467
466
*/
468
-
andis. r11, r10, 0x8000
469
-
beq 3f
467
+
lis r11, TASK_SIZE@h
468
+
cmplw r10, r11
469
+
blt+ 3f
470
470
lis r11, swapper_pg_dir@h
471
471
ori r11, r11, swapper_pg_dir@l
472
472
···
535
533
/* If we are faulting a kernel address, we have to use the
536
534
* kernel page tables.
537
535
*/
538
-
andis. r11, r10, 0x8000
539
-
beq 3f
536
+
lis r11, TASK_SIZE@h
537
+
cmplw r10, r11
538
+
blt+ 3f
540
539
lis r11, swapper_pg_dir@h
541
540
ori r11, r11, swapper_pg_dir@l
542
541