From: Juergen Gross <jgross@suse.com>
Date: Mon, 8 Jun 2026 05:17:36 +0000 (+0200)
Subject: x86/msr: Remove wrmsr_on_cpu()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=97a6561aca552a942298429b9904825c2c862285;p=thirdparty%2Flinux.git

x86/msr: Remove wrmsr_on_cpu()

wrmsr_on_cpu() has no users left. Delete it.

Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Link: https://patch.msgid.link/20260608051741.3207435-7-jgross@suse.com
---

diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index 6e0d7a6335ff8..0205643c1ece9 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -256,7 +256,6 @@ int msr_set_bit(u32 msr, u8 bit);
 int msr_clear_bit(u32 msr, u8 bit);
 
 #ifdef CONFIG_SMP
-int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h);
 int rdmsrq_on_cpu(unsigned int cpu, u32 msr_no, u64 *q);
 int wrmsrq_on_cpu(unsigned int cpu, u32 msr_no, u64 q);
 void rdmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr __percpu *msrs);
@@ -268,11 +267,6 @@ int wrmsrq_safe_on_cpu(unsigned int cpu, u32 msr_no, u64 q);
 int rdmsr_safe_regs_on_cpu(unsigned int cpu, u32 regs[8]);
 int wrmsr_safe_regs_on_cpu(unsigned int cpu, u32 regs[8]);
 #else  /*  CONFIG_SMP  */
-static inline int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
-{
-	wrmsr(msr_no, l, h);
-	return 0;
-}
 static inline int rdmsrq_on_cpu(unsigned int cpu, u32 msr_no, u64 *q)
 {
 	rdmsrq(msr_no, *q);
diff --git a/arch/x86/lib/msr-smp.c b/arch/x86/lib/msr-smp.c
index 65658e8877e65..a434c80408a0b 100644
--- a/arch/x86/lib/msr-smp.c
+++ b/arch/x86/lib/msr-smp.c
@@ -46,22 +46,6 @@ int rdmsrq_on_cpu(unsigned int cpu, u32 msr_no, u64 *q)
 }
 EXPORT_SYMBOL(rdmsrq_on_cpu);
 
-int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
-{
-	int err;
-	struct msr_info rv;
-
-	memset(&rv, 0, sizeof(rv));
-
-	rv.msr_no = msr_no;
-	rv.reg.l = l;
-	rv.reg.h = h;
-	err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1);
-
-	return err;
-}
-EXPORT_SYMBOL(wrmsr_on_cpu);
-
 int wrmsrq_on_cpu(unsigned int cpu, u32 msr_no, u64 q)
 {
 	int err;