From 29bcff787a2593b2126cfaff612c0b4e560022e9 Mon Sep 17 00:00:00 2001 From: Yufen Yu Date: Thu, 20 Aug 2020 09:22:08 -0400 Subject: md/raid5: add new xor function to support different page offset raid5 will call async_xor() and async_xor_val() to compute xor. For now, both of them require the common src/dst page offset. But, we want them to support different src/dst page offset for following shared page. Here, adding two new function async_xor_offs() and async_xor_val_offs() respectively for async_xor() and async_xor_val(). Signed-off-by: Yufen Yu Signed-off-by: Song Liu --- include/linux/async_tx.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/linux/async_tx.h') diff --git a/include/linux/async_tx.h b/include/linux/async_tx.h index 4c328fef403c..8901f3c801ee 100644 --- a/include/linux/async_tx.h +++ b/include/linux/async_tx.h @@ -162,11 +162,22 @@ struct dma_async_tx_descriptor * async_xor(struct page *dest, struct page **src_list, unsigned int offset, int src_cnt, size_t len, struct async_submit_ctl *submit); +struct dma_async_tx_descriptor * +async_xor_offs(struct page *dest, unsigned int offset, + struct page **src_list, unsigned int *src_offset, + int src_cnt, size_t len, struct async_submit_ctl *submit); + struct dma_async_tx_descriptor * async_xor_val(struct page *dest, struct page **src_list, unsigned int offset, int src_cnt, size_t len, enum sum_check_flags *result, struct async_submit_ctl *submit); +struct dma_async_tx_descriptor * +async_xor_val_offs(struct page *dest, unsigned int offset, + struct page **src_list, unsigned int *src_offset, + int src_cnt, size_t len, enum sum_check_flags *result, + struct async_submit_ctl *submit); + struct dma_async_tx_descriptor * async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset, unsigned int src_offset, size_t len, -- cgit