From c105aa31183a6ebec395681b6df47c8b65259322 Mon Sep 17 00:00:00 2001 From: Juri Lelli Date: Wed, 31 May 2017 17:59:29 +0100 Subject: [PATCH] arm,arm64,drivers: reduce scope of cap_parsing_failed Reduce the scope of cap_parsing_failed (making it static in drivers/base/arch_topology.c) by slightly changing {arm,arm64} DT parsing code. For arm checking for !cap_parsing_failed before calling normalize_ cpu_capacity() is superfluous, as returning an error from parse_ cpu_capacity() (above) means cap_from _dt is set to false. For arm64 we can simply check if raw_capacity points to something, which is not if capacity parsing has failed. Suggested-by: Morten Rasmussen Signed-off-by: Juri Lelli Acked-by: Russell King Acked-by: Catalin Marinas Acked-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman --- arch/arm/kernel/topology.c | 3 +-- arch/arm64/kernel/topology.c | 5 +---- drivers/base/arch_topology.c | 4 ++-- 3 files changed, 4 insertions(+), 8 deletions(-) diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c index 49ef025ffaa0..1e35a3265ddf 100644 --- a/arch/arm/kernel/topology.c +++ b/arch/arm/kernel/topology.c @@ -76,7 +76,6 @@ static unsigned long *__cpu_capacity; static unsigned long middle_capacity = 1; static bool cap_from_dt = true; -extern bool cap_parsing_failed; extern void normalize_cpu_capacity(void); extern int __init parse_cpu_capacity(struct device_node *cpu_node, int cpu); @@ -165,7 +164,7 @@ static void __init parse_dt_topology(void) middle_capacity = ((max_capacity / 3) >> (SCHED_CAPACITY_SHIFT-1)) + 1; - if (cap_from_dt && !cap_parsing_failed) + if (cap_from_dt) normalize_cpu_capacity(); } diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c index c5bc31eb97e8..7e1f6f75185b 100644 --- a/arch/arm64/kernel/topology.c +++ b/arch/arm64/kernel/topology.c @@ -27,7 +27,6 @@ #include #include -extern bool cap_parsing_failed; extern void normalize_cpu_capacity(void); extern int __init parse_cpu_capacity(struct device_node *cpu_node, int cpu); @@ -187,10 +186,8 @@ static int __init parse_dt_topology(void) * cluster with restricted subnodes. */ map = of_get_child_by_name(cn, "cpu-map"); - if (!map) { - cap_parsing_failed = true; + if (!map) goto out; - } ret = parse_cluster(map, 0); if (ret != 0) diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 097834f0fcd7..acf99372c5cf 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -95,7 +95,7 @@ subsys_initcall(register_cpu_capacity_sysctl); static u32 capacity_scale; static u32 *raw_capacity; -bool cap_parsing_failed; +static bool cap_parsing_failed; void normalize_cpu_capacity(void) { @@ -210,7 +210,7 @@ static int __init register_cpufreq_notifier(void) * until we have the necessary code to parse the cpu capacity, so * skip registering cpufreq notifier. */ - if (!acpi_disabled || cap_parsing_failed) + if (!acpi_disabled || !raw_capacity) return -EINVAL; if (!alloc_cpumask_var(&cpus_to_visit, GFP_KERNEL)) { -- 2.20.1