[PATCH 2/5] radix tree test suite: fix compilation issue

[Ross Zwisler]

Pulled from a patch from Matthew Wilcox entitled
"xarray: Add definition of struct xarray":

> From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
> Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>

https://patchwork.kernel.org/patch/10341249/

These defines fix this compilation error:

In file included from ./linux/radix-tree.h:6:0,
                 from ./linux/../../../../include/linux/idr.h:15,
                 from ./linux/idr.h:1,
                 from idr.c:4:
./linux/../../../../include/linux/idr.h: In function âidr_init_baseâ:
./linux/../../../../include/linux/radix-tree.h:129:2: warning: implicit declaration of function âspin_lock_initâ; did you mean âspinlock_tâ? [-Wimplicit-function-declaration]
  spin_lock_init(&(root)->xa_lock);    \
  ^
./linux/../../../../include/linux/idr.h:126:2: note: in expansion of macro âINIT_RADIX_TREEâ
  INIT_RADIX_TREE(&idr->idr_rt, IDR_RT_MARKER);
  ^~~~~~~~~~~~~~~

by providing a spin_lock_init() wrapper for the v4.17-rc* version of the
radix tree test suite.

Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
---
 tools/include/linux/spinlock.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/include/linux/spinlock.h b/tools/include/linux/spinlock.h
index b21b586b9854..1738c0391da4 100644
--- a/tools/include/linux/spinlock.h
+++ b/tools/include/linux/spinlock.h
@@ -6,8 +6,9 @@
 #include <stdbool.h>
 
 #define spinlock_t		pthread_mutex_t
-#define DEFINE_SPINLOCK(x)	pthread_mutex_t x = PTHREAD_MUTEX_INITIALIZER;
+#define DEFINE_SPINLOCK(x)	pthread_mutex_t x = PTHREAD_MUTEX_INITIALIZER
 #define __SPIN_LOCK_UNLOCKED(x)	(pthread_mutex_t)PTHREAD_MUTEX_INITIALIZER
+#define spin_lock_init(x)      pthread_mutex_init(x, NULL)
 
 #define spin_lock_irqsave(x, f)		(void)f, pthread_mutex_lock(x)
 #define spin_unlock_irqrestore(x, f)	(void)f, pthread_mutex_unlock(x)
-- 
2.14.3