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>

1 files changed, 15 insertions, 0 deletions

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 *))