From de1af8f62a78ea8abcc2dddb6de622e4069a368e Mon Sep 17 00:00:00 2001
From: Matthew Wilcox <willy@linux.intel.com>
Date: Wed, 14 Dec 2016 15:09:25 -0800
Subject: [PATCH] radix tree test suite: add some more functionality

IDR needs more functionality from the kernel: kmalloc()/kfree(), and
xchg().

Link: http://lkml.kernel.org/r/1480369871-5271-67-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 tools/testing/radix-tree/linux.c        | 15 +++++++++++++++
 tools/testing/radix-tree/linux/kernel.h |  3 +++
 tools/testing/radix-tree/linux/slab.h   |  3 +++
 3 files changed, 21 insertions(+)

diff --git a/tools/testing/radix-tree/linux.c b/tools/testing/radix-tree/linux.c
index 1f32a16a3848..ff0452e8a0c4 100644
--- a/tools/testing/radix-tree/linux.c
+++ b/tools/testing/radix-tree/linux.c
@@ -54,6 +54,21 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp)
 	free(objp);
 }
 
+void *kmalloc(size_t size, gfp_t gfp)
+{
+	void *ret = malloc(size);
+	uatomic_inc(&nr_allocated);
+	return ret;
+}
+
+void kfree(void *p)
+{
+	if (!p)
+		return;
+	uatomic_dec(&nr_allocated);
+	free(p);
+}
+
 struct kmem_cache *
 kmem_cache_create(const char *name, size_t size, size_t offset,
 	unsigned long flags, void (*ctor)(void *))
diff --git a/tools/testing/radix-tree/linux/kernel.h b/tools/testing/radix-tree/linux/kernel.h
index 23e77f5673ce..9b43b4975d83 100644
--- a/tools/testing/radix-tree/linux/kernel.h
+++ b/tools/testing/radix-tree/linux/kernel.h
@@ -8,6 +8,7 @@
 #include <limits.h>
 
 #include "../../include/linux/compiler.h"
+#include "../../include/linux/err.h"
 #include "../../../include/linux/kconfig.h"
 
 #ifdef BENCHMARK
@@ -58,4 +59,6 @@ static inline int in_interrupt(void)
 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
 #define round_down(x, y) ((x) & ~__round_mask(x, y))
 
+#define xchg(ptr, x)	uatomic_xchg(ptr, x)
+
 #endif /* _KERNEL_H */
diff --git a/tools/testing/radix-tree/linux/slab.h b/tools/testing/radix-tree/linux/slab.h
index 452e2bf502e3..446639f78fc1 100644
--- a/tools/testing/radix-tree/linux/slab.h
+++ b/tools/testing/radix-tree/linux/slab.h
@@ -7,6 +7,9 @@
 #define SLAB_PANIC 2
 #define SLAB_RECLAIM_ACCOUNT    0x00020000UL            /* Objects are reclaimable */
 
+void *kmalloc(size_t size, gfp_t);
+void kfree(void *);
+
 struct kmem_cache {
 	int size;
 	void (*ctor)(void *);