forked from Minki/linux
54df2db36c
srmmu_nocache_bitmap is cleared by bit_map_init(). But bit_map_init()
attempts to clear by memset(), so it can't clear the trailing edge of
bitmap properly on big-endian architecture if the number of bits is not
a multiple of BITS_PER_LONG.
Actually, the number of bits in srmmu_nocache_bitmap is not always
a multiple of BITS_PER_LONG. It is calculated as below:
bitmap_bits = srmmu_nocache_size >> SRMMU_NOCACHE_BITMAP_SHIFT;
srmmu_nocache_size is decided proportionally by the amount of system RAM
and it is rounded to a multiple of PAGE_SIZE. SRMMU_NOCACHE_BITMAP_SHIFT
is defined as (PAGE_SHIFT - 4). So it can only be said that bitmap_bits
is a multiple of 16.
This fixes the problem by using bitmap_clear() instead of memset()
in bit_map_init() and this also uses BITS_TO_LONGS() to calculate correct
size at bitmap allocation time.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
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| .. | ||
| ashldi3.S | ||
| ashrdi3.S | ||
| atomic32.c | ||
| atomic_64.S | ||
| bitext.c | ||
| bitops.S | ||
| blockops.S | ||
| bzero.S | ||
| checksum_32.S | ||
| checksum_64.S | ||
| clear_page.S | ||
| cmpdi2.c | ||
| copy_in_user.S | ||
| copy_page.S | ||
| copy_user.S | ||
| COPYING.LIB | ||
| csum_copy_from_user.S | ||
| csum_copy_to_user.S | ||
| csum_copy.S | ||
| divdi3.S | ||
| ffs.S | ||
| GENbzero.S | ||
| GENcopy_from_user.S | ||
| GENcopy_to_user.S | ||
| GENmemcpy.S | ||
| GENpage.S | ||
| GENpatch.S | ||
| hweight.S | ||
| iomap.c | ||
| ipcsum.S | ||
| ksyms.c | ||
| libgcc.h | ||
| locks.S | ||
| lshrdi3.S | ||
| Makefile | ||
| mcount.S | ||
| memcmp.S | ||
| memcpy.S | ||
| memmove.S | ||
| memscan_32.S | ||
| memscan_64.S | ||
| memset.S | ||
| muldi3.S | ||
| NG2copy_from_user.S | ||
| NG2copy_to_user.S | ||
| NG2memcpy.S | ||
| NG2patch.S | ||
| NG4clear_page.S | ||
| NG4copy_from_user.S | ||
| NG4copy_page.S | ||
| NG4copy_to_user.S | ||
| NG4memcpy.S | ||
| NG4memset.S | ||
| NG4patch.S | ||
| NGbzero.S | ||
| NGcopy_from_user.S | ||
| NGcopy_to_user.S | ||
| NGmemcpy.S | ||
| NGpage.S | ||
| NGpatch.S | ||
| PeeCeeI.c | ||
| strlen.S | ||
| strncmp_32.S | ||
| strncmp_64.S | ||
| U1copy_from_user.S | ||
| U1copy_to_user.S | ||
| U1memcpy.S | ||
| U3copy_from_user.S | ||
| U3copy_to_user.S | ||
| U3memcpy.S | ||
| U3patch.S | ||
| ucmpdi2.c | ||
| udivdi3.S | ||
| user_fixup.c | ||
| usercopy.c | ||
| VISsave.S | ||
| xor.S | ||