[PATCH] kconfig: DEBUG_PAGEALLOC and SOFTWARE_SUSPEND are incompatible on i386

On i386, SOFTWARE_SUSPEND requires the CPU to have PSE support, but
DEBUG_PAGEALLOC disables PSE.  Thus, allowing both options to be enabled
simultaneously makes no sense.  This patch disables DEBUG_PAGEALLOC if
SOFTWARE_SUSPEND is enabled; it also displays a comment to briefly explain
why DEBUG_PAGEALLOC is missing in that case.

I have tested this patch against oldconfig and menuconfig on 2.6.11-bk2.
Signed-off-by: Barry K. Nathan <barryn@pobox.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/Kconfig.debug

@@ -38,9 +38,12 @@ config DEBUG_STACK_USAGE
 
 	  This option will slow down process creation somewhat.
 
+comment "Page alloc debug is incompatible with Software Suspend on i386"
+	depends on DEBUG_KERNEL && SOFTWARE_SUSPEND
+
 config DEBUG_PAGEALLOC
 	bool "Page alloc debugging"
-	depends on DEBUG_KERNEL
+	depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND
 	help
 	  Unmap pages from the kernel linear mapping after free_pages().
 	  This results in a large slowdown, but helps to find certain types