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Rev 3637 Rev 3652
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    spc = bs->spc;
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    spc = bs->spc;
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    boundary = ROUND_UP(nodep->size, bps * spc);
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    boundary = ROUND_UP(nodep->size, bps * spc);
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    /* zero out already allocated space */
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    /* zero out already allocated space */
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    for (o = nodep->size - 1; o < pos && o < boundary;
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    for (o = nodep->size; o < pos && o < boundary;
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        o = ALIGN_DOWN(o + bps, bps)) {
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        o = ALIGN_DOWN(o + bps, bps)) {
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            int flags = (o % bps == 0) ?
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            int flags = (o % bps == 0) ?
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            BLOCK_FLAGS_NOREAD : BLOCK_FLAGS_NONE;
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            BLOCK_FLAGS_NOREAD : BLOCK_FLAGS_NONE;
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        b = fat_block_get(bs, nodep, o / bps, flags);
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        b = fat_block_get(bs, nodep, o / bps, flags);
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        memset(b->data + o % bps, 0, bps - o % bps);
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        memset(b->data + o % bps, 0, bps - o % bps);