memcmpz -> lblk_is_zeros
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@ -504,6 +504,25 @@ lblk_alloc_elem_read(struct dm_compress* dc, struct zone_cache* zc, u64 lblk)
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* Logical block functions
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**************************************/
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static inline bool
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lblk_is_zeros(struct cbd_params* params, struct zone_cache* zc)
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{
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#ifdef CBD_DETECT_ZERO_BLOCKS
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u32 off;
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u32 len = PBLK_SIZE * lblk_per_pblk(params);
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for (off = 0; off < len; ++off) {
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if (zc->lblk[off]) {
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return false;
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}
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}
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return true;
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#else
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return false;
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#endif
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}
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/*
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* Compress dc->lblk into dc->lz4_cbuf
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*
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@ -569,11 +588,7 @@ lblk_write(struct dm_compress* dc, struct zone_cache* zc)
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BUG_ON(zc->lblk_alloc_elem_lblk == LBLK_NONE);
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d_len = PBLK_SIZE * lblk_per_pblk(&dc->params);
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#ifdef CBD_DETECT_ZERO_BLOCKS
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if (memcmpz(zc->lblk, d_len) == 0) {
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#else
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if (0) {
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#endif
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if (lblk_is_zeros(&dc->params, zc)) {
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c_len = 0;
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c_buf = NULL;
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zc->lblk_alloc_elem->len = 0;
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