x86/cpu: Remove write_tsc() and write_rdtscp_aux() wrappers

Drop write_tsc() and write_rdtscp_aux(); the former has no users, and the
latter has only a single user and is slightly misleading since the only
in-kernel consumer of MSR_TSC_AUX is RDPID, not RDTSCP.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210504225632.1532621-3-seanjc@google.com

diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index e16cccd..a3f87f1 100644 (file)
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -324,10 +324,6 @@ static inline int wrmsrl_safe(u32 msr, u64 val)
        return wrmsr_safe(msr, (u32)val,  (u32)(val >> 32));
 }
 
-#define write_tsc(low, high) wrmsr(MSR_IA32_TSC, (low), (high))
-
-#define write_rdtscp_aux(val) wrmsr(MSR_TSC_AUX, (val), 0)
-
 struct msr *msrs_alloc(void);
 void msrs_free(struct msr *msrs);
 int msr_set_bit(u32 msr, u8 bit);

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 490bed0..a1b756c 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1852,7 +1852,7 @@ static inline void setup_getcpu(int cpu)
        struct desc_struct d = { };
 
        if (boot_cpu_has(X86_FEATURE_RDTSCP) || boot_cpu_has(X86_FEATURE_RDPID))
-               write_rdtscp_aux(cpudata);
+               wrmsr(MSR_TSC_AUX, cpudata, 0);
 
        /* Store CPU and node number in limit. */
        d.limit0 = cpudata;