[PATCH] swsusp: Support i386 systems with PAE or without PSE

Make swsusp support i386 systems with PAE or without PSE.

This is done by creating temporary page tables located in resume-safe page
frames before the suspend image is restored in the same way as x86_64 does
it.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Andi Kleen <ak@suse.de>
Cc: Dave Jones <davej@redhat.com>
Cc: Nigel Cunningham <ncunningham@linuxmail.org>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/arch/i386/power/swsusp.S b/arch/i386/power/swsusp.S
index 8a2b50a0aaad..53662e05b393 100644
--- a/arch/i386/power/swsusp.S
+++ b/arch/i386/power/swsusp.S
@@ -28,8 +28,9 @@ ENTRY(swsusp_arch_suspend)
         call swsusp_save
         ret
 
-ENTRY(swsusp_arch_resume)
-        movl    $swsusp_pg_dir-__PAGE_OFFSET, %ecx
+ENTRY(restore_image)
+        movl    resume_pg_dir, %ecx
+        subl    $__PAGE_OFFSET, %ecx
         movl    %ecx, %cr3
 
         movl    restore_pblist, %edx
@@ -51,6 +52,10 @@ copy_loop:
         .p2align 4,,7
 
 done:
+        /* go back to the original page tables */
+        movl    $swapper_pg_dir, %ecx
+        subl    $__PAGE_OFFSET, %ecx
+        movl    %ecx, %cr3
         /* Flush TLB, including "global" things (vmalloc) */
         movl    mmu_cr4_features, %eax
         movl    %eax, %edx