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Fix path to setup.h

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Yaroslav Pronin 2018-08-12 17:54:32 +00:00 committed by GitHub
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Initialization/linux-initialization-3.md
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@ -29,7 +29,7 @@ Now let's look at `__va` macro. This macro defined in [init/main.c](https://gith
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
```
where `PAGE_OFFSET` is `__PAGE_OFFSET` which is `0xffff880000000000` and the base virtual address of the direct mapping of all physical memory. So we're getting virtual address of the `boot_params` structure and pass it to the `copy_bootdata` function, where we copy `real_mod_data` to the `boot_params` which is declared in the [arch/x86/kernel/setup.h](https://github.com/torvalds/linux/blob/16f73eb02d7e1765ccab3d2018e0bd98eb93d973/arch/x86/kernel/setup.h)
where `PAGE_OFFSET` is `__PAGE_OFFSET` which is `0xffff880000000000` and the base virtual address of the direct mapping of all physical memory. So we're getting virtual address of the `boot_params` structure and pass it to the `copy_bootdata` function, where we copy `real_mod_data` to the `boot_params` which is declared in the [arch/x86/include/asm/setup.h](https://github.com/torvalds/linux/blob/16f73eb02d7e1765ccab3d2018e0bd98eb93d973/arch/x86/include/asm/setup.h)
```C
extern struct boot_params boot_params;