xtensa: don't make bootmem bitmap larger than required
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>
diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c
index 55b043a..a534d52 100644
--- a/arch/xtensa/mm/init.c
+++ b/arch/xtensa/mm/init.c
@@ -130,7 +130,8 @@
/* 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++)