From 96dc4f9fb64690fc34410415fd1fc609cf803f61 Mon Sep 17 00:00:00 2001
From: Sahara <keun-o.park@darkmatter.ae>
Date: Thu, 16 Feb 2017 18:29:15 +0000
Subject: usercopy: Move enum for arch_within_stack_frames()

This patch moves the arch_within_stack_frames() return value enum up in
the header files so that per-architecture implementations can reuse the
same return values.

Signed-off-by: Sahara <keun-o.park@darkmatter.ae>
Signed-off-by: James Morse <james.morse@arm.com>
[kees: adjusted naming and commit log]
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 include/linux/thread_info.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'include')

diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index 58373875e8ee..0dbe41be6181 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -22,6 +22,18 @@
 #endif
 
 #include <linux/bitops.h>
+
+/*
+ * For per-arch arch_within_stack_frames() implementations, defined in
+ * asm/thread_info.h.
+ */
+enum {
+	BAD_STACK = -1,
+	NOT_STACK = 0,
+	GOOD_FRAME,
+	GOOD_STACK,
+};
+
 #include <asm/thread_info.h>
 
 #ifdef __KERNEL__
-- 
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