linux-kernel - [RFC PATCH 02/18] KVM: x86: Use this_cpu_ptr() instead of per_cpu_ptr(smp_processor

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <e072c819dfae617b4980be9a7baf706867ca602b.1660974106.git.isaku.yamahata@intel.com>
Date:   Fri, 19 Aug 2022 23:00:08 -0700
From:   isaku.yamahata@...el.com
To:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     isaku.yamahata@...el.com, isaku.yamahata@...il.com,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Kai Huang <kai.huang@...el.com>, Chao Gao <chao.gao@...el.com>,
        Will Deacon <will@...nel.org>
Subject: [RFC PATCH 02/18] KVM: x86: Use this_cpu_ptr() instead of per_cpu_ptr(smp_processor_id())

From: Isaku Yamahata <isaku.yamahata@...el.com>

convert per_cpu_ptr(smp_processor_id()) to this_cpu_ptr() as trivial
cleanup.

Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
---
 arch/x86/kvm/x86.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 16104a2f7d8e..7d5fff68befe 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -416,8 +416,7 @@ EXPORT_SYMBOL_GPL(kvm_find_user_return_msr);
 
 int kvm_set_user_return_msr(unsigned slot, u64 value, u64 mask)
 {
-	unsigned int cpu = smp_processor_id();
-	struct kvm_user_return_msrs *msrs = per_cpu_ptr(user_return_msrs, cpu);
+	struct kvm_user_return_msrs *msrs = this_cpu_ptr(user_return_msrs);
 	struct kvm_user_return_msr_values *values = &msrs->values[slot];
 	int err;
 
@@ -449,8 +448,7 @@ EXPORT_SYMBOL_GPL(kvm_set_user_return_msr);
 
 static void drop_user_return_notifiers(void)
 {
-	unsigned int cpu = smp_processor_id();
-	struct kvm_user_return_msrs *msrs = per_cpu_ptr(user_return_msrs, cpu);
+	struct kvm_user_return_msrs *msrs = this_cpu_ptr(user_return_msrs);
 
 	if (msrs->registered)
 		kvm_on_user_return(&msrs->urn);
-- 
2.25.1