void __init mem_init()

in mm/init.c [113:168]

• 53 lines of code
• 1 McCabe index (conditional complexity)

void __init mem_init(void)
{
	free_highpages();

	max_mapnr = max_pfn - ARCH_PFN_OFFSET;
	high_memory = (void *)__va(max_low_pfn << PAGE_SHIFT);

	memblock_free_all();

	pr_info("virtual kernel memory layout:\n"
#ifdef CONFIG_KASAN
		"    kasan   : 0x%08lx - 0x%08lx  (%5lu MB)\n"
#endif
#ifdef CONFIG_MMU
		"    vmalloc : 0x%08lx - 0x%08lx  (%5lu MB)\n"
#endif
#ifdef CONFIG_HIGHMEM
		"    pkmap   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
		"    fixmap  : 0x%08lx - 0x%08lx  (%5lu kB)\n"
#endif
		"    lowmem  : 0x%08lx - 0x%08lx  (%5lu MB)\n"
		"    .text   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
		"    .rodata : 0x%08lx - 0x%08lx  (%5lu kB)\n"
		"    .data   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
		"    .init   : 0x%08lx - 0x%08lx  (%5lu kB)\n"
		"    .bss    : 0x%08lx - 0x%08lx  (%5lu kB)\n",
#ifdef CONFIG_KASAN
		KASAN_SHADOW_START, KASAN_SHADOW_START + KASAN_SHADOW_SIZE,
		KASAN_SHADOW_SIZE >> 20,
#endif
#ifdef CONFIG_MMU
		VMALLOC_START, VMALLOC_END,
		(VMALLOC_END - VMALLOC_START) >> 20,
#ifdef CONFIG_HIGHMEM
		PKMAP_BASE, PKMAP_BASE + LAST_PKMAP * PAGE_SIZE,
		(LAST_PKMAP*PAGE_SIZE) >> 10,
		FIXADDR_START, FIXADDR_END,
		(FIXADDR_END - FIXADDR_START) >> 10,
#endif
		PAGE_OFFSET, PAGE_OFFSET +
		(max_low_pfn - min_low_pfn) * PAGE_SIZE,
#else
		min_low_pfn * PAGE_SIZE, max_low_pfn * PAGE_SIZE,
#endif
		((max_low_pfn - min_low_pfn) * PAGE_SIZE) >> 20,
		(unsigned long)_text, (unsigned long)_etext,
		(unsigned long)(_etext - _text) >> 10,
		(unsigned long)__start_rodata, (unsigned long)__end_rodata,
		(unsigned long)(__end_rodata - __start_rodata) >> 10,
		(unsigned long)_sdata, (unsigned long)_edata,
		(unsigned long)(_edata - _sdata) >> 10,
		(unsigned long)__init_begin, (unsigned long)__init_end,
		(unsigned long)(__init_end - __init_begin) >> 10,
		(unsigned long)__bss_start, (unsigned long)__bss_stop,
		(unsigned long)(__bss_stop - __bss_start) >> 10);
}