5dca6a1bb0
fix the bug reported here: http://bugzilla.kernel.org/show_bug.cgi?id=10232 use update_memory_range() instead of add_memory_range() directly to avoid closing the gap. ( the new code only affects and runs on systems where the MTRR workaround triggers. ) Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/*
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* structures and definitions for the int 15, ax=e820 memory map
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* scheme.
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*
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* In a nutshell, arch/i386/boot/setup.S populates a scratch table
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* in the empty_zero_block that contains a list of usable address/size
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* duples. In arch/i386/kernel/setup.c, this information is
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* transferred into the e820map, and in arch/i386/mm/init.c, that
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* new information is used to mark pages reserved or not.
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*
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*/
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#ifndef __E820_HEADER
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#define __E820_HEADER
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#include <linux/ioport.h>
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#define HIGH_MEMORY (1024*1024)
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#ifndef __ASSEMBLY__
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extern struct e820map e820;
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extern void update_e820(void);
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extern int e820_all_mapped(unsigned long start, unsigned long end,
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unsigned type);
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extern int e820_any_mapped(u64 start, u64 end, unsigned type);
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extern void find_max_pfn(void);
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extern void register_bootmem_low_pages(unsigned long max_low_pfn);
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extern void add_memory_region(unsigned long long start,
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unsigned long long size, int type);
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extern void update_memory_range(u64 start, u64 size, unsigned old_type,
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unsigned new_type);
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extern void e820_register_memory(void);
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extern void limit_regions(unsigned long long size);
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extern void print_memory_map(char *who);
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extern void init_iomem_resources(struct resource *code_resource,
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struct resource *data_resource,
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struct resource *bss_resource);
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#if defined(CONFIG_PM) && defined(CONFIG_HIBERNATION)
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extern void e820_mark_nosave_regions(void);
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#else
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static inline void e820_mark_nosave_regions(void)
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{
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}
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#endif
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#endif/*!__ASSEMBLY__*/
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#endif/*__E820_HEADER*/
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