linux-kernel - Re: [PATCH 3/3] mm: convert mm->cpu_vm_cpumask into cpumask_var

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Message-Id: <20110419091947.936D.A69D9226@jp.fujitsu.com>
Date:	Tue, 19 Apr 2011 09:19:37 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>
Subject: Re: [PATCH 3/3] mm: convert mm->cpu_vm_cpumask into cpumask_var_t

> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> ---
>  Documentation/cachetlb.txt |    2 +-
>  include/linux/mm_types.h   |    9 ++++++---
>  include/linux/sched.h      |    1 +
>  init/main.c                |    2 ++
>  kernel/fork.c              |   37 ++++++++++++++++++++++++++++++++++---
>  mm/init-mm.c               |    1 -
>  6 files changed, 44 insertions(+), 8 deletions(-)
> 
> This patch don't touch x86/kerrnel/tboot.c. because it can't be compiled.

My bad. I confounded CONFIG_HAVE_INTEL_TXT with CONFIG_INTEL_TXT. Proper
fixing (and incremental) patch is here.



>From 0b443d8dbdf7ce97f92e6622840585ca41abca83 Mon Sep 17 00:00:00 2001
From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Date: Tue, 19 Apr 2011 08:38:01 +0900
Subject: [PATCH 4/4] fix tboot

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
 arch/x86/kernel/tboot.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index 998e972..0f0d1a3 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -110,7 +110,6 @@ static struct mm_struct tboot_mm = {
 	.mmap_sem       = __RWSEM_INITIALIZER(init_mm.mmap_sem),
 	.page_table_lock =  __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock),
 	.mmlist         = LIST_HEAD_INIT(init_mm.mmlist),
-	.cpu_vm_mask    = CPU_MASK_ALL,
 };
 
 static inline void switch_to_tboot_pt(void)
@@ -337,9 +336,18 @@ static struct notifier_block tboot_cpu_notifier __cpuinitdata =
 
 static __init int tboot_late_init(void)
 {
+	int ret;
+
 	if (!tboot_enabled())
 		return 0;
 
+	ret = mm_init_cpumask(&tboot_mm, 0);
+	if (ret) {
+		pr_warning("tboot: Allocation failure, disable tboot.\n");
+		tboot = NULL;
+		return ret;
+	}
+
 	tboot_create_trampoline();
 
 	atomic_set(&ap_wfs_count, 0);
-- 
1.7.3.1




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