From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Date: Tue, 18 Aug 2009 06:06:02 +0000 (+0900)
Subject: sched, task_struct: stack_canary is not needed without CC_STACKPROTECTOR
X-Git-Tag: v2.6.32-rc1~719^2~29
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=1314562a9ae5f39f6f595656023c1baf970831ef;p=~shefty%2Frdma-dev.git

sched, task_struct: stack_canary is not needed without CC_STACKPROTECTOR

The field stack_canary is only used with CC_STACKPROTECTOR.
This patch reduces task_struct size without CC_STACKPROTECTOR.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
LKML-Reference: <4A8A44CA.2020701@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 195d72d5c10..7bc2d929083 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1237,8 +1237,10 @@ struct task_struct {
 	pid_t pid;
 	pid_t tgid;
 
+#ifdef CONFIG_CC_STACKPROTECTOR
 	/* Canary value for the -fstack-protector gcc feature */
 	unsigned long stack_canary;
+#endif
 
 	/* 
 	 * pointers to (original) parent process, youngest child, younger sibling,