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Commit 69a7704d authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
Browse files

x86: e820: user-defined memory maps: remove the range instead of update it to reserved 



also let mem= to print out modified e820 map too

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Cc: Bernhard Walle <bwalle@suse.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 27cb0a75

arch/x86/kernel/e820.c

+5 −6
Original line number Diff line number Diff line
@@ -1165,6 +1165,8 @@ static void early_panic(char *msg) 
	panic(msg);

}



static int userdef __initdata;



/* "mem=nopentium" disables the 4MB page tables. */

static int __init parse_memopt(char *p)

{
@@ -1180,17 +1182,15 @@ static int __init parse_memopt(char *p) 
	}

#endif



	userdef = 1;

	mem_size = memparse(p, &p);

	end_user_pfn = mem_size>>PAGE_SHIFT;

	e820_update_range(mem_size, ULLONG_MAX - mem_size,

		E820_RAM, E820_RESERVED);

	e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);



	return 0;

}

early_param("mem", parse_memopt);



static int userdef __initdata;



static int __init parse_memmap_opt(char *p)

{

	char *oldp;
@@ -1230,8 +1230,7 @@ static int __init parse_memmap_opt(char *p) 
		e820_add_region(start_at, mem_size, E820_RESERVED);

	} else {

		end_user_pfn = (mem_size >> PAGE_SHIFT);

		e820_update_range(mem_size, ULLONG_MAX - mem_size,

			E820_RAM, E820_RESERVED);

		e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);

	}

	return *p == '\0' ? 0 : -EINVAL;

}