linux-kernel - [tip:ras/core] x86/mce: Fix debugfs_simple

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Date:   Fri, 19 Apr 2019 10:28:52 -0700
From:   tip-bot for YueHaibing <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tony.luck@...el.com, mingo@...nel.org,
        torvalds@...ux-foundation.org, tglx@...utronix.de, hpa@...or.com,
        yazen.ghannam@....com, peterz@...radead.org,
        vishal.l.verma@...el.com, yuehaibing@...wei.com, bp@...en8.de,
        linux-kernel@...r.kernel.org
Subject: [tip:ras/core] x86/mce: Fix debugfs_simple_attr.cocci warnings

Commit-ID:  28156d7678431312b463361b23a218a1b5645ba5
Gitweb:     https://git.kernel.org/tip/28156d7678431312b463361b23a218a1b5645ba5
Author:     YueHaibing <yuehaibing@...wei.com>
AuthorDate: Fri, 28 Dec 2018 07:24:13 +0000
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Fri, 19 Apr 2019 19:25:08 +0200

x86/mce: Fix debugfs_simple_attr.cocci warnings

Use DEFINE_DEBUGFS_ATTRIBUTE() rather than DEFINE_SIMPLE_ATTRIBUTE()
for debugfs files.

Semantic patch information:

  Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file()
  imposes some significant overhead as compared to
  DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe().

Generated by: scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Vishal Verma <vishal.l.verma@...el.com>
Cc: Yazen Ghannam <yazen.ghannam@....com>
Cc: kernel-janitors@...r.kernel.org
Link: http://lkml.kernel.org/r/1545981853-70877-1-git-send-email-yuehaibing@huawei.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/cpu/mce/core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 58925e7ccb27..3e081428117c 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -2429,8 +2429,8 @@ static int fake_panic_set(void *data, u64 val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(fake_panic_fops, fake_panic_get,
-			fake_panic_set, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(fake_panic_fops, fake_panic_get, fake_panic_set,
+			 "%llu\n");
 
 static int __init mcheck_debugfs_init(void)
 {
@@ -2439,8 +2439,8 @@ static int __init mcheck_debugfs_init(void)
 	dmce = mce_get_debugfs_dir();
 	if (!dmce)
 		return -ENOMEM;
-	ffake_panic = debugfs_create_file("fake_panic", 0444, dmce, NULL,
-					  &fake_panic_fops);
+	ffake_panic = debugfs_create_file_unsafe("fake_panic", 0444, dmce,
+						 NULL, &fake_panic_fops);
 	if (!ffake_panic)
 		return -ENOMEM;