cpuidle,arch: Mark all regular cpuidle_state:: Enter methods __cpuidle

For all cpuidle drivers that do not use CPUIDLE_FLAG_RCU_IDLE (iow,
the simple ones) make sure all the functions are marked __cpuidle.

( due to lack of noinstr validation on these platforms it is entirely
  possible this isn't complete )
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230112195542.335211484@infradead.org

arch/arm/kernel/cpuidle.c

@@ -26,8 +26,8 @@ static struct cpuidle_ops cpuidle_ops[NR_CPUS] __ro_after_init;
  *
  * Returns the index passed as parameter
  */
-int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
-		struct cpuidle_driver *drv, int index)
+__cpuidle int arm_cpuidle_simple_enter(struct cpuidle_device *dev, struct
+				       cpuidle_driver *drv, int index)
 {
 	cpu_do_idle();
 

arch/arm/mach-davinci/cpuidle.c

@@ -44,8 +44,8 @@ static void davinci_save_ddr_power(int enter, bool pdown)
 }
 
 /* Actual code that puts the SoC in different idle states */
-static int davinci_enter_idle(struct cpuidle_device *dev,
-			      struct cpuidle_driver *drv, int index)
+static __cpuidle int davinci_enter_idle(struct cpuidle_device *dev,
+					struct cpuidle_driver *drv, int index)
 {
 	davinci_save_ddr_power(1, ddr2_pdown);
 	cpu_do_idle();

arch/arm/mach-imx/cpuidle-imx5.c

@@ -8,8 +8,8 @@
 #include <asm/system_misc.h>
 #include "cpuidle.h"
 
-static int imx5_cpuidle_enter(struct cpuidle_device *dev,
-			      struct cpuidle_driver *drv, int index)
+static __cpuidle int imx5_cpuidle_enter(struct cpuidle_device *dev,
+					struct cpuidle_driver *drv, int index)
 {
 	arm_pm_idle();
 	return index;

arch/arm/mach-imx/cpuidle-imx6sl.c

@@ -11,8 +11,8 @@
 #include "common.h"
 #include "cpuidle.h"
 
-static int imx6sl_enter_wait(struct cpuidle_device *dev,
-			    struct cpuidle_driver *drv, int index)
+static __cpuidle int imx6sl_enter_wait(struct cpuidle_device *dev,
+				       struct cpuidle_driver *drv, int index)
 {
 	imx6_set_lpm(WAIT_UNCLOCKED);
 	/*

arch/arm/mach-imx/cpuidle-imx7ulp.c

@@ -12,8 +12,8 @@
 #include "common.h"
 #include "cpuidle.h"
 
-static int imx7ulp_enter_wait(struct cpuidle_device *dev,
-			    struct cpuidle_driver *drv, int index)
+static __cpuidle int imx7ulp_enter_wait(struct cpuidle_device *dev,
+					struct cpuidle_driver *drv, int index)
 {
 	if (index == 1)
 		imx7ulp_set_lpm(ULP_PM_WAIT);

arch/arm/mach-s3c/cpuidle-s3c64xx.c

@@ -19,9 +19,8 @@
 #include "regs-sys-s3c64xx.h"
 #include "regs-syscon-power-s3c64xx.h"
 
-static int s3c64xx_enter_idle(struct cpuidle_device *dev,
-			      struct cpuidle_driver *drv,
-			      int index)
+static __cpuidle int s3c64xx_enter_idle(struct cpuidle_device *dev,
+					struct cpuidle_driver *drv, int index)
 {
 	unsigned long tmp;
 

arch/mips/kernel/idle.c

@@ -241,7 +241,7 @@ void __init check_wait(void)
 	}
 }
 
-void arch_cpu_idle(void)
+__cpuidle void arch_cpu_idle(void)
 {
 	if (cpu_wait)
 		cpu_wait();
@@ -249,8 +249,8 @@ void arch_cpu_idle(void)
 
 #ifdef CONFIG_CPU_IDLE
 
-int mips_cpuidle_wait_enter(struct cpuidle_device *dev,
-			    struct cpuidle_driver *drv, int index)
+__cpuidle int mips_cpuidle_wait_enter(struct cpuidle_device *dev,
+				      struct cpuidle_driver *drv, int index)
 {
 	arch_cpu_idle();
 	return index;