linux-kernel - [PATCH v2] powerpc/cell/axon_msi: replace DEFINE_SIMPLE_ATTRIBUTE with DEFINE_DEBUGFS

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Date:   Wed, 22 Dec 2021 09:06:55 +0000
From:   cgel.zte@...il.com
To:     mpe@...erman.id.au
Cc:     arnd@...db.de, benh@...nel.crashing.org, cgel.zte@...il.com,
        deng.changcheng@....com.cn, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, paulus@...ba.org, zealci@....com.cn
Subject: [PATCH v2] powerpc/cell/axon_msi: replace DEFINE_SIMPLE_ATTRIBUTE with  DEFINE_DEBUGFS_ATTRIBUTE

From: Changcheng Deng <deng.changcheng@....com.cn>

Fix the following coccicheck warning:
./arch/powerpc/platforms/cell/axon_msi.c: 456: 0-23: WARNING: fops_msic
should be defined with DEFINE_DEBUGFS_ATTRIBUTE

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

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Changcheng Deng <deng.changcheng@....com.cn>
---
 arch/powerpc/platforms/cell/axon_msi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/cell/axon_msi.c b/arch/powerpc/platforms/cell/axon_msi.c
index 354a58c1e6f2..362c1efe4180 100644
--- a/arch/powerpc/platforms/cell/axon_msi.c
+++ b/arch/powerpc/platforms/cell/axon_msi.c
@@ -453,7 +453,7 @@ static int msic_get(void *data, u64 *val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(fops_msic, msic_get, msic_set, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(fops_msic, msic_get, msic_set, "%llu\n");
 
 void axon_msi_debug_setup(struct device_node *dn, struct axon_msic *msic)
 {
@@ -474,6 +474,6 @@ void axon_msi_debug_setup(struct device_node *dn, struct axon_msic *msic)
 
 	snprintf(name, sizeof(name), "msic_%d", of_node_to_nid(dn));
 
-	debugfs_create_file(name, 0600, arch_debugfs_dir, msic, &fops_msic);
+	debugfs_create_file_unsafe(name, 0600, arch_debugfs_dir, msic, &fops_msic);
 }
 #endif /* DEBUG */
-- 
2.25.1