[patch 04/10] radix tree test suite: fix compilation issue

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From: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Subject: radix tree test suite: fix compilation issue

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 `idr_init_base':
./linux/../../../../include/linux/radix-tree.h:129:2: warning: implicit declaration of function `spin_lock_init'; did you mean `spinlock_t'? [-Wimplicit-function-declaration]
  spin_lock_init(&(root)->xa_lock);    \
  ^
./linux/../../../../include/linux/idr.h:126:2: note: in expansion of macro `INIT_RADIX_TREE'
  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.

Link: http://lkml.kernel.org/r/20180503192430.7582-3-ross.zwisler@xxxxxxxxxxxxxxx
Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: CR, Sapthagirish <sapthagirish.cr@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 tools/include/linux/spinlock.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff -puN tools/include/linux/spinlock.h~radix-tree-test-suite-fix-compilation-issue tools/include/linux/spinlock.h
--- a/tools/include/linux/spinlock.h~radix-tree-test-suite-fix-compilation-issue
+++ a/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)
_
--
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