linux-kernel - Re: [PATCH 1/2] mm: Properly separate the bloated ptl from the regular case

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Message-Id: <20131115231548.60418E0090@blue.fi.intel.com>
Date:	Sat, 16 Nov 2013 01:15:48 +0200 (EET)
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Tony Luck <tony.luck@...il.com>
Cc:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH 1/2] mm: Properly separate the bloated ptl from the
 regular case

Tony Luck wrote:
> On Fri, Nov 15, 2013 at 2:01 PM, Tony Luck <tony.luck@...il.com> wrote:
> Help!

Could you try this:

>From 661b6057c435fbae265b394b277a0b16bf02d255 Mon Sep 17 00:00:00 2001
From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Date: Sat, 16 Nov 2013 01:09:17 +0200
Subject: [PATCH] kernel/bounds: avoid circular dependencies in generated
 headers

<linux/spinlock.h> has havy dependencies on other header files.
It trigger circular dependencies in generated headers on IA64, at least:

  CC      kernel/bounds.s
In file included from /home/space/kas/git/public/linux/arch/ia64/include/asm/thread_info.h:9:0,
                 from include/linux/thread_info.h:54,
                 from include/asm-generic/preempt.h:4,
                 from arch/ia64/include/generated/asm/preempt.h:1,
                 from include/linux/preempt.h:18,
                 from include/linux/spinlock.h:50,
                 from kernel/bounds.c:14:
/home/space/kas/git/public/linux/arch/ia64/include/asm/asm-offsets.h:1:35: fatal error: generated/asm-offsets.h: No such file or directory
compilation terminated.

Let's replace <linux/spinlock.h> with <linux/spinlock_types.h>, it's
enough to find out size of spinlock_t.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 kernel/bounds.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bounds.c b/kernel/bounds.c
index 578782ef6ae1..5253204afdca 100644
--- a/kernel/bounds.c
+++ b/kernel/bounds.c
@@ -11,7 +11,7 @@
 #include <linux/kbuild.h>
 #include <linux/page_cgroup.h>
 #include <linux/log2.h>
-#include <linux/spinlock.h>
+#include <linux/spinlock_types.h>
 
 void foo(void)
 {
-- 
 Kirill A. Shutemov
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