Add semaphore.h to kernel_lock.c
kernel_lock.c uses DECLARE_MUTEX, up() and down() without explicitly
including asm/semaphore.h. This is fragile and leaves it vulnerable
to breakage during header reorganisations.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
index 812dbf0..fbc11a3 100644
--- a/lib/kernel_lock.c
+++ b/lib/kernel_lock.c
@@ -8,6 +8,7 @@
#include <linux/smp_lock.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
+#include <asm/semaphore.h>
/*
* The 'big kernel semaphore'
