linux-kernel - [tip:x86/mm] x86/pat: Trivial: don't create debugfs for memtype if pat is disabled

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Date:	Thu, 26 Nov 2009 17:27:38 GMT
From:	tip-bot for Xiaotian Feng <dfeng@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	venkatesh.pallipadi@...el.com, suresh.b.siddha@...el.com,
	tglx@...utronix.de, dfeng@...hat.com, mingo@...e.hu
Subject: [tip:x86/mm] x86/pat: Trivial: don't create debugfs for memtype if pat is disabled

Commit-ID:  dd4377b02d9f028006beed1b7b1695ee5d1498b6
Gitweb:     http://git.kernel.org/tip/dd4377b02d9f028006beed1b7b1695ee5d1498b6
Author:     Xiaotian Feng <dfeng@...hat.com>
AuthorDate: Thu, 26 Nov 2009 19:53:48 +0800
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 26 Nov 2009 15:05:03 +0100

x86/pat: Trivial: don't create debugfs for memtype if pat is disabled

If pat is disabled (boot with nopat), there's no need to create
debugfs for it, it's empty all the time.

Signed-off-by: Xiaotian Feng <dfeng@...hat.com>
Cc: Suresh Siddha <suresh.b.siddha@...el.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
Cc: H. Peter Anvin <hpa@...or.com>
LKML-Reference: <1259236428-16329-1-git-send-email-dfeng@...hat.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/mm/pat.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index ef71251..a81b7e7 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -1019,8 +1019,10 @@ static const struct file_operations memtype_fops = {
 
 static int __init pat_memtype_list_init(void)
 {
-	debugfs_create_file("pat_memtype_list", S_IRUSR, arch_debugfs_dir,
-				NULL, &memtype_fops);
+	if (pat_enabled) {
+		debugfs_create_file("pat_memtype_list", S_IRUSR,
+				    arch_debugfs_dir, NULL, &memtype_fops);
+	}
 	return 0;
 }
 
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