swsusp: fix highmem

[Pavel Machek <pavel@ucw.cz>]

Hi!

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.

Please apply,
								Pavel 

--- clean-mm/kernel/power/swsusp.c	2004-08-17 12:21:44.000000000 +0200
+++ linux-mm/kernel/power/swsusp.c	2004-08-17 13:01:35.000000000 +0200
@@ -854,8 +854,10 @@
 	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 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();


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