linux-kernel - [PATCH 2/2] Add new __init_task_data macro to be used in arch init

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Message-Id: <1245801576-13374-2-git-send-email-tabbott@ksplice.com>
Date:	Tue, 23 Jun 2009 19:59:36 -0400
From:	Tim Abbott <tabbott@...lice.com>
To:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Cc:	Sam Ravnborg <sam@...nborg.org>, devel@...lice.com,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Tim Abbott <tabbott@...lice.com>
Subject: [PATCH 2/2] Add new __init_task_data macro to be used in arch init_task.c files.

This patch is preparation for replacing most ".data.init_task" in the
kernel with macros, so that the section name can later be changed
without having to touch a lot of the kernel.

The long-term goal here is to be able to change the kernel's magic
section names to those that are compatible with -ffunction-sections
-fdata-sections.  This requires renaming all magic sections with names
of the form ".data.foo".

Signed-off-by: Tim Abbott <tabbott@...lice.com>
Cc: Sam Ravnborg <sam@...nborg.org>
---
 include/linux/init_task.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 5368fbd..7fc01b1 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -183,5 +183,8 @@ extern struct cred init_cred;
 	LIST_HEAD_INIT(cpu_timers[2]),					\
 }
 
+/* Attach to the init_task data structure for proper alignment */
+#define __init_task_data __attribute__((__section__(".data.init_task")))
+
 
 #endif
-- 
1.6.3.1

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