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erofs: avoid using generic_block_bmap
[ Upstream commit d8b3df8 ] Surprisingly, `block' in sector_t indicates the number of i_blkbits-sized blocks rather than sectors for bmap. In addition, considering buffer_head limits mapped size to 32-bits, should avoid using generic_block_bmap. Link: https://lore.kernel.org/r/20201209115740.18802-1-huangjianan@oppo.com Fixes: 9da681e ("staging: erofs: support bmap") Reviewed-by: Chao Yu <yuchao0@huawei.com> Reviewed-by: Gao Xiang <hsiangkao@redhat.com> Signed-off-by: Huang Jianan <huangjianan@oppo.com> Signed-off-by: Guo Weichao <guoweichao@oppo.com> [ Gao Xiang: slightly update the commit message description. ] Signed-off-by: Gao Xiang <hsiangkao@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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