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xtensa: don't make bootmem bitmap larger than required

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If min_low_pfn is non-zero, the bitmap reserved for bootmem is bigger
than needed.  The number of pages bootmem has to maintain is the range
from min_low_pfn to max_low_pfn.

For now it has only been a theoretical mistake, min_low_pfn was always
zero.

Signed-off-by: Johannes Weiner <jw@emlix.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Johannes Weiner 2009-03-04 16:21:29 +01:00 committed by Chris Zankel
parent 0bef42e5c0
commit 264da9f708
1 changed files with 2 additions and 1 deletions
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3
arch/xtensa/mm/init.c
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@ -130,7 +130,8 @@ void __init bootmem_init(void)
/* Find an area to use for the bootmem bitmap. */
bootmap_size = bootmem_bootmap_pages(max_low_pfn) << PAGE_SHIFT;
bootmap_size = bootmem_bootmap_pages(max_low_pfn - min_low_pfn);
bootmap_size <<= PAGE_SHIFT;
bootmap_start = ~0;
for (i=0; i<sysmem.nr_banks; i++)