pr_*() is preferred than printk(KERN_* ...), after change all the print
in arch/x86/kernel/kvm.c will have "kvm_guest: xxx" style.

No functional change.

Signed-off-by: Zhenzhong Duan <zhenzhong.d...@oracle.com>
Cc: Paolo Bonzini <pbonz...@redhat.com>
Cc: Radim Krcmar <rkrc...@redhat.com>
Cc: Sean Christopherson <sean.j.christopher...@intel.com>
Cc: Vitaly Kuznetsov <vkuzn...@redhat.com>
Cc: Wanpeng Li <wanpen...@tencent.com>
Cc: Jim Mattson <jmatt...@google.com>
Cc: Joerg Roedel <j...@8bytes.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Borislav Petkov <b...@alien8.de>
Cc: "H. Peter Anvin" <h...@zytor.com>
---
 arch/x86/kernel/kvm.c | 30 ++++++++++++++++--------------
 1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 481d879..a4bfe67 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -7,6 +7,8 @@
  *   Authors: Anthony Liguori <aligu...@us.ibm.com>
  */
 
+#define pr_fmt(fmt) "kvm_guest: " fmt
+
 #include <linux/context_tracking.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -286,8 +288,8 @@ static void kvm_register_steal_time(void)
                return;
 
        wrmsrl(MSR_KVM_STEAL_TIME, (slow_virt_to_phys(st) | KVM_MSR_ENABLED));
-       pr_info("kvm-stealtime: cpu %d, msr %llx\n",
-               cpu, (unsigned long long) slow_virt_to_phys(st));
+       pr_info("stealtime: cpu %d, msr %llx\n", cpu,
+               (unsigned long long) slow_virt_to_phys(st));
 }
 
 static DEFINE_PER_CPU_DECRYPTED(unsigned long, kvm_apic_eoi) = 
KVM_PV_EOI_DISABLED;
@@ -321,8 +323,7 @@ static void kvm_guest_cpu_init(void)
 
                wrmsrl(MSR_KVM_ASYNC_PF_EN, pa);
                __this_cpu_write(apf_reason.enabled, 1);
-               printk(KERN_INFO"KVM setup async PF for cpu %d\n",
-                      smp_processor_id());
+               pr_info("setup async PF for cpu %d\n", smp_processor_id());
        }
 
        if (kvm_para_has_feature(KVM_FEATURE_PV_EOI)) {
@@ -347,8 +348,7 @@ static void kvm_pv_disable_apf(void)
        wrmsrl(MSR_KVM_ASYNC_PF_EN, 0);
        __this_cpu_write(apf_reason.enabled, 0);
 
-       printk(KERN_INFO"Unregister pv shared memory for cpu %d\n",
-              smp_processor_id());
+       pr_info("Unregister pv shared memory for cpu %d\n", smp_processor_id());
 }
 
 static void kvm_pv_guest_cpu_reboot(void *unused)
@@ -469,7 +469,8 @@ static void __send_ipi_mask(const struct cpumask *mask, int 
vector)
                } else {
                        ret = kvm_hypercall4(KVM_HC_SEND_IPI, (unsigned 
long)ipi_bitmap,
                                (unsigned long)(ipi_bitmap >> BITS_PER_LONG), 
min, icr);
-                       WARN_ONCE(ret < 0, "KVM: failed to send PV IPI: %ld", 
ret);
+                       WARN_ONCE(ret < 0, "kvm_guest: failed to send PV IPI: 
%ld",
+                                 ret);
                        min = max = apic_id;
                        ipi_bitmap = 0;
                }
@@ -479,7 +480,8 @@ static void __send_ipi_mask(const struct cpumask *mask, int 
vector)
        if (ipi_bitmap) {
                ret = kvm_hypercall4(KVM_HC_SEND_IPI, (unsigned long)ipi_bitmap,
                        (unsigned long)(ipi_bitmap >> BITS_PER_LONG), min, icr);
-               WARN_ONCE(ret < 0, "KVM: failed to send PV IPI: %ld", ret);
+               WARN_ONCE(ret < 0, "kvm_guest: failed to send PV IPI: %ld",
+                         ret);
        }
 
        local_irq_restore(flags);
@@ -509,7 +511,7 @@ static void kvm_setup_pv_ipi(void)
 {
        apic->send_IPI_mask = kvm_send_ipi_mask;
        apic->send_IPI_mask_allbutself = kvm_send_ipi_mask_allbutself;
-       pr_info("KVM setup pv IPIs\n");
+       pr_info("setup pv IPIs\n");
 }
 
 static void kvm_smp_send_call_func_ipi(const struct cpumask *mask)
@@ -639,11 +641,11 @@ static void __init kvm_guest_init(void)
            !kvm_para_has_hint(KVM_HINTS_REALTIME) &&
            kvm_para_has_feature(KVM_FEATURE_STEAL_TIME)) {
                smp_ops.send_call_func_ipi = kvm_smp_send_call_func_ipi;
-               pr_info("KVM setup pv sched yield\n");
+               pr_info("setup pv sched yield\n");
        }
        if (cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "x86/kvm:online",
                                      kvm_cpu_online, kvm_cpu_down_prepare) < 0)
-               pr_err("kvm_guest: Failed to install cpu hotplug callbacks\n");
+               pr_err("failed to install cpu hotplug callbacks\n");
 #else
        sev_map_percpu_data();
        kvm_guest_cpu_init();
@@ -746,7 +748,7 @@ static __init int kvm_setup_pv_tlb_flush(void)
                        zalloc_cpumask_var_node(per_cpu_ptr(&__pv_tlb_mask, 
cpu),
                                GFP_KERNEL, cpu_to_node(cpu));
                }
-               pr_info("KVM setup pv remote TLB flush\n");
+               pr_info("setup pv remote TLB flush\n");
        }
 
        return 0;
@@ -879,8 +881,8 @@ static void kvm_enable_host_haltpoll(void *i)
 void arch_haltpoll_enable(unsigned int cpu)
 {
        if (!kvm_para_has_feature(KVM_FEATURE_POLL_CONTROL)) {
-               pr_err_once("kvm: host does not support poll control\n");
-               pr_err_once("kvm: host upgrade recommended\n");
+               pr_err_once("host does not support poll control\n");
+               pr_err_once("host upgrade recommended\n");
                return;
        }
 
-- 
1.8.3.1

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