[PATCH] uml: update atomic.h so UML builds cleanly

The comment should be self-explanatory.  This works around a pile of
nasty-looking build output.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-um/atomic.h

 #ifndef __UM_ATOMIC_H
 #define __UM_ATOMIC_H
 
+/* The i386 atomic.h calls printk, but doesn't include kernel.h, so we
+ * include it here.
+ */
+#include "linux/kernel.h"
+
 #include "asm/arch/atomic.h"
 
 #endif