linux-kernel - [PATCH] x86/kvm: convert to DEFINE_DEBUGFS

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Date:   Tue,  8 Jan 2019 00:30:17 +0800
From:   Peng Hao <penghao122@...a.com.cn>
To:     pbonzini@...hat.com, rkrcmar@...hat.com, tglx@...utronix.de
Cc:     x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Peng Hao <peng.hao2@....com.cn>
Subject: [PATCH]  x86/kvm: convert to DEFINE_DEBUGFS_ATTRIBUTE


From: Peng Hao <peng.hao2@....com.cn>

The preferred strategy to define debugfs attributes is to use
the DEFINE_DEBUGFS_ATTRIBUTE() macro and to use
debugfs_create_file_unsafe().

Signed-off-by: Peng Hao <peng.hao2@....com.cn>
---
 arch/x86/kvm/debugfs.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/debugfs.c b/arch/x86/kvm/debugfs.c
index c19c7ed..cc1187f 100644
--- a/arch/x86/kvm/debugfs.c
+++ b/arch/x86/kvm/debugfs.c
@@ -22,7 +22,8 @@ static int vcpu_get_tsc_offset(void *data, u64 *val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n");
+DEFINE_DEBUGFS_ATTRIBUTE(vcpu_tsc_offset_fops,
+			 vcpu_get_tsc_offset, NULL, "%lld\n");
 
 static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
 {
@@ -31,7 +32,8 @@ static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(vcpu_tsc_scaling_fops,
+			 vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
 
 static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
 {
@@ -39,25 +41,26 @@ static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(vcpu_tsc_scaling_frac_fops,
+			 vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
 
 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
 {
 	struct dentry *ret;
 
-	ret = debugfs_create_file("tsc-offset", 0444,
+	ret = debugfs_create_file_unsafe("tsc-offset", 0444,
 							vcpu->debugfs_dentry,
 							vcpu, &vcpu_tsc_offset_fops);
 	if (!ret)
 		return -ENOMEM;
 
 	if (kvm_has_tsc_control) {
-		ret = debugfs_create_file("tsc-scaling-ratio", 0444,
+		ret = debugfs_create_file_unsafe("tsc-scaling-ratio", 0444,
 							vcpu->debugfs_dentry,
 							vcpu, &vcpu_tsc_scaling_fops);
 		if (!ret)
 			return -ENOMEM;
-		ret = debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
+		ret = debugfs_create_file_unsafe("tsc-scaling-ratio-frac-bits", 0444,
 							vcpu->debugfs_dentry,
 							vcpu, &vcpu_tsc_scaling_frac_fops);
 		if (!ret)
-- 
1.8.3.1