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x86, mm: Let "memmap=" take more entries one time

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Current "memmap=" only can take one entry every time.
when we have more entries, we have to use memmap= for each of them.

For pxe booting, we have command line length limitation, those extra
"memmap=" would waste too much space.

This patch make memmap= could take several entries one time,
and those entries will be split with ','

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-47-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Yinghai Lu 2012-11-16 19:39:23 -08:00 committed by H. Peter Anvin
parent 600cc5b7f6
commit 9710f581bb
1 changed files with 15 additions and 1 deletions
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16
arch/x86/kernel/e820.c
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@ -835,7 +835,7 @@ static int __init parse_memopt(char *p)
} }
early_param("mem", parse_memopt); early_param("mem", parse_memopt);
static int __init parse_memmap_opt(char *p) static int __init parse_memmap_one(char *p)
{ {
char *oldp; char *oldp;
u64 start_at, mem_size; u64 start_at, mem_size;
@ -877,6 +877,20 @@ static int __init parse_memmap_opt(char *p)
return *p == '\0' ? 0 : -EINVAL; return *p == '\0' ? 0 : -EINVAL;
} }
static int __init parse_memmap_opt(char *str)
{
while (str) {
char *k = strchr(str, ',');
if (k)
*k++ = 0;
parse_memmap_one(str);
str = k;
}
return 0;
}
early_param("memmap", parse_memmap_opt); early_param("memmap", parse_memmap_opt);
void __init finish_e820_parsing(void) void __init finish_e820_parsing(void)