redo: radix tree test suite: fix compilation

[ This resurrects commit 53855d10f456, which was reverted in
  2b41226b39b6.  It depended on commit d544abd5ff7d ("lib/radix-tree:
  Convert to hotplug state machine") so now it is correct to apply ]

Patch "lib/radix-tree: Convert to hotplug state machine" breaks the test
suite as it adds a call to cpuhp_setup_state_nocalls() which is not
currently emulated in the test suite.  Add it, and delete the emulation
of the old CPU hotplug mechanism.

Link: http://lkml.kernel.org/r/1480369871-5271-36-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.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>

3 files changed, 1 insertions, 30 deletions

diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 0019aca0f328..6f382e07de77 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -31,7 +31,6 @@
 #include <linux/percpu.h>
 #include <linux/slab.h>
 #include <linux/kmemleak.h>
-#include <linux/notifier.h>
 #include <linux/cpu.h>
 #include <linux/string.h>
 #include <linux/bitops.h>
diff --git a/tools/testing/radix-tree/linux/cpu.h b/tools/testing/radix-tree/linux/cpu.h
index 7cf412103205..a45530d78107 100644
--- a/tools/testing/radix-tree/linux/cpu.h
+++ b/tools/testing/radix-tree/linux/cpu.h
@@ -1,21 +1 @@
-
-#define hotcpu_notifier(a, b)
-
-#define CPU_ONLINE              0x0002 /* CPU (unsigned)v is up */
-#define CPU_UP_PREPARE          0x0003 /* CPU (unsigned)v coming up */
-#define CPU_UP_CANCELED         0x0004 /* CPU (unsigned)v NOT coming up */
-#define CPU_DOWN_PREPARE        0x0005 /* CPU (unsigned)v going down */
-#define CPU_DOWN_FAILED         0x0006 /* CPU (unsigned)v NOT going down */
-#define CPU_DEAD                0x0007 /* CPU (unsigned)v dead */
-#define CPU_POST_DEAD           0x0009 /* CPU (unsigned)v dead, cpu_hotplug
-                                        * lock is dropped */
-#define CPU_BROKEN              0x000C /* CPU (unsigned)v did not die properly,
-                                        * perhaps due to preemption. */
-#define CPU_TASKS_FROZEN        0x0010
-
-#define CPU_ONLINE_FROZEN       (CPU_ONLINE | CPU_TASKS_FROZEN)
-#define CPU_UP_PREPARE_FROZEN   (CPU_UP_PREPARE | CPU_TASKS_FROZEN)
-#define CPU_UP_CANCELED_FROZEN  (CPU_UP_CANCELED | CPU_TASKS_FROZEN)
-#define CPU_DOWN_PREPARE_FROZEN (CPU_DOWN_PREPARE | CPU_TASKS_FROZEN)
-#define CPU_DOWN_FAILED_FROZEN  (CPU_DOWN_FAILED | CPU_TASKS_FROZEN)
-#define CPU_DEAD_FROZEN         (CPU_DEAD | CPU_TASKS_FROZEN)
+#define cpuhp_setup_state_nocalls(a, b, c, d)   (0)
diff --git a/tools/testing/radix-tree/linux/notifier.h b/tools/testing/radix-tree/linux/notifier.h
deleted file mode 100644
index 70e4797d5a46..000000000000
--- a/tools/testing/radix-tree/linux/notifier.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef _NOTIFIER_H
-#define _NOTIFIER_H
-
-struct notifier_block;
-
-#define NOTIFY_OK              0x0001          /* Suits me */
-
-#endif