A closer sweep of configurable audit symbols shows the following need

audit.h included when audit.h is detangled from fs.h.

        arch/um/kernel/ptrace.c    for audit_syscall_entry/exit
        arch/s390/kernel/ptrace.c  for audit_syscall_entry/exit
        arch/mips/kernel/ptrace.c  for audit_syscall_entry/exit
Signed-off-by: Chris Wright <chrisw@osdl.org>

arch/mips/kernel/ptrace.c

@@ -25,6 +25,7 @@
 #include <linux/smp_lock.h>
 #include <linux/user.h>
 #include <linux/security.h>
+#include <linux/audit.h>
 
 #include <asm/cpu.h>
 #include <asm/fpu.h>

arch/s390/kernel/ptrace.c

@@ -31,6 +31,7 @@
 #include <linux/ptrace.h>
 #include <linux/user.h>
 #include <linux/security.h>
+#include <linux/audit.h>
 
 #include <asm/segment.h>
 #include <asm/page.h>

arch/um/kernel/ptrace.c

@@ -9,6 +9,7 @@
 #include "linux/smp_lock.h"
 #include "linux/security.h"
 #include "linux/ptrace.h"
+#include "linux/audit.h"
 #ifdef CONFIG_PROC_MM
 #include "linux/proc_mm.h"
 #endif