imx6的linux(3.0.35_4.1.0)编译出来开机画面怎么是2个企鹅-已解决-第3页回答

imx6的linux(3.0.35_4.1.0)编译出来开机画面怎么是2个企鹅-已解决

2020-02-21 21:32发布

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1楼-- · 2020-02-23 11:06

include/linux/cpumask.h:
83 #if NR_CPUS > 1
84 #define num_online_cpus() cpumask_weight(cpu_online_mask)
...

include/linux/threads.h:
14 #ifndef CONFIG_NR_CPUS 15 /* FIXME: This should be fixed in the arch's Kconfig */ 16 #define CONFIG_NR_CPUS 1
17 #endif
20 #define NR_CPUS CONFIG_NR_CPUS

hiberhe

2楼-- · 2020-02-23 16:17

本帖最后由 hiberhe 于 2014-7-25 00:15 编辑

arch/arm/Kconfig:
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
depends on SMP
default "4"

include/linux/cpumask.h,:
442 /**
443 * cpumask_weight - Count of bits in *srcp
444 * @srcp: the cpumask to count bits (< nr_cpu_ids) in.
445 */
446 static inline unsigned int cpumask_weight(const struct cpumask *srcp)
447 {
448 return bitmap_weight(cpumask_bits(srcp), nr_cpumask_bits);
449 }