From 69a7704d7a80b2563278a0c55c2ca6d6202280dc Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Thu, 10 Jul 2008 04:17:00 -0700 Subject: [PATCH] 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: Yinghai Lu Cc: Bernhard Walle Signed-off-by: Ingo Molnar --- arch/x86/kernel/e820.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index 9836a079cfd..3451e0b3f32 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -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; } -- 2.41.1