diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h
index ae9b0d4615b3..07a9331d55e7 100644
--- a/arch/x86/entry/calling.h
+++ b/arch/x86/entry/calling.h
@@ -6,7 +6,6 @@
 #include <asm/percpu.h>
 #include <asm/asm-offsets.h>
 #include <asm/processor-flags.h>
-#include <asm/inst.h>
 
 /*
 
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index 6a9df71c1b9e..9cceee612569 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -562,7 +562,7 @@ static void domain_add_cpu(int cpu, struct rdt_resource *r)
 
 	d = rdt_find_domain(r, id, &add_pos);
 	if (IS_ERR(d)) {
-		pr_warn("Could't find cache id for cpu %d\n", cpu);
+		pr_warn("Couldn't find cache id for CPU %d\n", cpu);
 		return;
 	}
 
@@ -607,7 +607,7 @@ static void domain_remove_cpu(int cpu, struct rdt_resource *r)
 
 	d = rdt_find_domain(r, id, NULL);
 	if (IS_ERR_OR_NULL(d)) {
-		pr_warn("Could't find cache id for cpu %d\n", cpu);
+		pr_warn("Couldn't find cache id for CPU %d\n", cpu);
 		return;
 	}
 
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index baa21090c9be..5c358ccf6649 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -24,7 +24,6 @@
 #include <asm/irqdomain.h>
 #include <asm/mtrr.h>
 #include <asm/mpspec.h>
-#include <asm/io_apic.h>
 #include <asm/proto.h>
 #include <asm/bios_ebda.h>
 #include <asm/e820/api.h>
diff --git a/include/linux/entry-common.h b/include/linux/entry-common.h
index 159c7476b11b..474f29638d2c 100644
--- a/include/linux/entry-common.h
+++ b/include/linux/entry-common.h
@@ -38,7 +38,7 @@
 #endif
 
 /*
- * TIF flags handled in syscall_enter_from_usermode()
+ * TIF flags handled in syscall_enter_from_user_mode()
  */
 #ifndef ARCH_SYSCALL_ENTER_WORK
 # define ARCH_SYSCALL_ENTER_WORK	(0)
diff --git a/kernel/entry/common.c b/kernel/entry/common.c
index 6fdb6105e6d6..145ab11b8318 100644
--- a/kernel/entry/common.c
+++ b/kernel/entry/common.c
@@ -208,7 +208,7 @@ static inline bool report_single_step(unsigned long ti_work)
 /*
  * If TIF_SYSCALL_EMU is set, then the only reason to report is when
  * TIF_SINGLESTEP is set (i.e. PTRACE_SYSEMU_SINGLESTEP).  This syscall
- * instruction has been already reported in syscall_enter_from_usermode().
+ * instruction has been already reported in syscall_enter_from_user_mode().
  */
 #define SYSEMU_STEP	(_TIF_SINGLESTEP | _TIF_SYSCALL_EMU)