linux-kernel - [PATCH] Update the alignment for 4K stacks.

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Message-ID: <Pine.LNX.4.64.0706241518590.24337@localhost.localdomain>
Date:	Sun, 24 Jun 2007 15:21:37 -0400 (EDT)
From:	"Robert P. J. Day" <rpjday@...dspring.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
cc:	Andrew Morton <akpm@...l.org>, Paul Mundt <lethal@...ux-sh.org>
Subject: [PATCH] Update the alignment for 4K stacks.


Just following the advice in the comments, update the alignment when
4K stacks are selected, since gcc 3.0 shouldn't be an issue anymore.

Signed-off-by: Robert P. J. Day <rpjday@...dspring.com>

---

 arch/i386/kernel/irq.c |    8 ++------
 arch/sh/kernel/irq.c   |    8 ++------
 2 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c
index d2daf67..504f134 100644
--- a/arch/i386/kernel/irq.c
+++ b/arch/i386/kernel/irq.c
@@ -149,15 +149,11 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)

 #ifdef CONFIG_4KSTACKS

-/*
- * These should really be __section__(".bss.page_aligned") as well, but
- * gcc's 3.0 and earlier don't handle that correctly.
- */
 static char softirq_stack[NR_CPUS * THREAD_SIZE]
-		__attribute__((__aligned__(THREAD_SIZE)));
+		__attribute__((__section__(".bss.page_aligned")));

 static char hardirq_stack[NR_CPUS * THREAD_SIZE]
-		__attribute__((__aligned__(THREAD_SIZE)));
+		__attribute__((__section__(".bss.page_aligned")));

 /*
  * allocate per-cpu stacks for hardirq and for softirq processing
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index 27b923c..2789779 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -158,15 +158,11 @@ asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs)
 }

 #ifdef CONFIG_4KSTACKS
-/*
- * These should really be __section__(".bss.page_aligned") as well, but
- * gcc's 3.0 and earlier don't handle that correctly.
- */
 static char softirq_stack[NR_CPUS * THREAD_SIZE]
-		__attribute__((__aligned__(THREAD_SIZE)));
+		__attribute__((__section__(".bss.page_aligned")));

 static char hardirq_stack[NR_CPUS * THREAD_SIZE]
-		__attribute__((__aligned__(THREAD_SIZE)));
+		__attribute__((__section__(".bss.page_aligned")));

 /*
  * allocate per-cpu stacks for hardirq and for softirq processing
diff --git a/include/asm-blackfin/macros.h b/include/asm-blackfin/macros.h
deleted file mode 100644
index e69de29..0000000
-- 
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

http://fsdev.net/wiki/index.php?title=Main_Page
========================================================================
-
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