[PATCH v3 32/51] cpuidle,acpi: Make noinstr clean

Peter Zijlstra
Thu, 12 Jan 2023 19:43:46 -0000

vmlinux.o: warning: objtool: io_idle+0xc: call to __inb.isra.0() leaves
.noinstr.text section
vmlinux.o: warning: objtool: acpi_idle_enter+0xfe: call to num_online_cpus()
leaves .noinstr.text section
vmlinux.o: warning: objtool: acpi_idle_enter+0x115: call to
acpi_idle_fallback_to_c1.isra.0() leaves .noinstr.text section

Signed-off-by: Peter Zijlstra (Intel) <peterz at infradead.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
Acked-by: Frederic Weisbecker <frederic at kernel.org>
Tested-by: Tony Lindgren <tony at atomide.com>
Tested-by: Ulf Hansson <ulf.hansson at linaro.org>
---
 arch/x86/include/asm/shared/io.h |    4 ++--
 drivers/acpi/processor_idle.c    |    2 +-
 include/linux/cpumask.h          |    4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

--- a/arch/x86/include/asm/shared/io.h
+++ b/arch/x86/include/asm/shared/io.h
@@ -5,13 +5,13 @@
 #include <linux/types.h>

 #define BUILDIO(bwl, bw, type)						\
-static inline void __out##bwl(type value, u16 port)			\
+static __always_inline void __out##bwl(type value, u16 port)		\
 {									\
 	asm volatile("out" #bwl " %" #bw "0, %w1"			\
 		     : : "a"(value), "Nd"(port));			\
 }									\
 									\
-static inline type __in##bwl(u16 port)					\
+static __always_inline type __in##bwl(u16 port)				\
 {									\
 	type value;							\
 	asm volatile("in" #bwl " %w1, %" #bw "0"			\
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -593,7 +593,7 @@ static int acpi_idle_play_dead(struct cp
 	return 0;
 }

-static bool acpi_idle_fallback_to_c1(struct acpi_processor *pr)
+static __always_inline bool acpi_idle_fallback_to_c1(struct acpi_processor *pr)
 {
 	return IS_ENABLED(CONFIG_HOTPLUG_CPU) && !pr->flags.has_cst
&&
 		!(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED);
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -908,9 +908,9 @@ static inline const struct cpumask *get_
  * concurrent CPU hotplug operations unless invoked from a cpuhp_lock held
  * region.
  */
-static inline unsigned int num_online_cpus(void)
+static __always_inline unsigned int num_online_cpus(void)
 {
-	return atomic_read(&__num_online_cpus);
+	return arch_atomic_read(&__num_online_cpus);
 }
 #define num_possible_cpus()	cpumask_weight(cpu_possible_mask)
 #define num_present_cpus()	cpumask_weight(cpu_present_mask)