From: Pavel Machek <pavel@ucw.cz>
This actually calls highmem_resume(), so swsusp has chance to work on
highmem machines. It also adds comments about code flow, which is quite
interesting at that point.
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/kernel/power/swsusp.c | 7 +++++++
1 files changed, 7 insertions(+)
diff -puN kernel/power/swsusp.c~swsusp-fix-highmem kernel/power/swsusp.c
--- 25/kernel/power/swsusp.c~swsusp-fix-highmem Tue Aug 17 15:15:11 2004
+++ 25-akpm/kernel/power/swsusp.c Tue Aug 17 15:15:11 2004
@@ -854,8 +854,10 @@ int swsusp_suspend(void)
local_irq_disable();
save_processor_state();
error = swsusp_arch_suspend();
+ /* Restore control flow magically appears here */
restore_processor_state();
local_irq_enable();
+ restore_highmem();
return error;
}
@@ -874,8 +876,13 @@ int swsusp_resume(void)
{
int error;
local_irq_disable();
+ /* We'll ignore saved state, but this gets preempt count (etc) right */
save_processor_state();
error = swsusp_arch_resume();
+ /* Code below is only ever reached in case of failure. Otherwise
+ * execution continues at place where swsusp_arch_suspend was called
+ */
+ BUG_ON(!error);
restore_processor_state();
restore_highmem();
local_irq_enable();
_