sh: Fix fs.h removal from mm.h regressions.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 3a17830..15ae322 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -18,6 +18,7 @@
 #include <linux/kdebug.h>
 #include <linux/tick.h>
 #include <linux/reboot.h>
+#include <linux/fs.h>
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
 #include <asm/pgalloc.h>