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Merge pull request #656 from changuoqiang/master

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Update linux-initialization-4.md
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Dongliang Mu 2019-03-04 13:50:25 -05:00 committed by GitHub
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Initialization/linux-initialization-4.md
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@ -315,7 +315,7 @@ For example let's look at `set_cpu_possible`. As we passed `true` as the second
cpumask_set_cpu(cpu, to_cpumask(cpu_possible_bits));
```
will be called. First of all let's try to understand the `to_cpumask` macro. This macro casts a bitmap to a `struct cpumask *`. CPU masks provide a bitmap suitable for representing the set of CPU's in a system, one bit position per CPU number. CPU mask presented by the `cpu_mask` structure:
will be called. First of all let's try to understand the `to_cpumask` macro. This macro casts a bitmap to a `struct cpumask *`. CPU masks provide a bitmap suitable for representing the set of CPU's in a system, one bit position per CPU number. CPU mask presented by the `cpumask` structure:
```C
typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t;