kernel/crypto/scatterwalk.c, branch linux-5.1.y

crypto: scatterwalk - remove 'chain' argument from scatterwalk_crypto_chain()

2018-08-03T10:06:03Z

All callers pass chain=0 to scatterwalk_crypto_chain(). Remove this unneeded parameter. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu

crypto: scatterwalk - Remove unnecessary aliasing check in map_and_copy

2016-11-22T07:02:25Z

The aliasing check in map_and_copy is no longer necessary because the IPsec ESP code no longer provides an IV that points into the actual request data. As this check is now triggering BUG checks due to the vmalloced stack code, I'm removing it. Reported-by: Eric Biggers Signed-off-by: Herbert Xu

crypto: scatterwalk - Inline start/map/done

2016-07-18T09:35:50Z

This patch inlines the functions scatterwalk_start, scatterwalk_map and scatterwalk_done as they're all tiny and mostly used by the block cipher walker. Signed-off-by: Herbert Xu

crypto: scatterwalk - Remove unnecessary BUG in scatterwalk_start

2016-07-18T09:35:50Z

Nothing bad will happen even if sg->length is zero, so there is no point in keeping this BUG_ON in scatterwalk_start. Signed-off-by: Herbert Xu

crypto: scatterwalk - Remove unnecessary advance in scatterwalk_pagedone

2016-07-18T09:35:50Z

The offset advance in scatterwalk_pagedone not only is unnecessary, but it was also buggy when it was needed by scatterwalk_copychunks. As the latter has long ago been fixed to call scatterwalk_advance directly, we can remove this unnecessary offset adjustment. Signed-off-by: Herbert Xu

crypto: scatterwalk - Fix test in scatterwalk_done

2016-07-18T09:35:49Z

When there is more data to be processed, the current test in scatterwalk_done may prevent us from calling pagedone even when we should. In particular, if we're on an SG entry spanning multiple pages where the last page is not a full page, we will incorrectly skip calling pagedone on the second last page. This patch fixes this by adding a separate test for whether we've reached the end of a page. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu

crypto: scatterwalk - Add no-copy support to copychunks

2016-07-18T09:35:48Z

The function ablkcipher_done_slow is pretty much identical to scatterwalk_copychunks except that it doesn't actually copy as the processing hasn't been completed yet. This patch allows scatterwalk_copychunks to be used in this case by specifying out == 2. Signed-off-by: Herbert Xu

crypto: scatterwalk - Remove scatterwalk_bytes_sglen

2016-07-18T09:35:48Z

This patch removes the now unused scatterwalk_bytes_sglen. Anyone using this out-of-tree should switch over to sg_nents_for_len. Signed-off-by: Herbert Xu

crypto: scatterwalk - Hide PageSlab call to optimise away flush_dcache_page

2015-06-03T02:51:25Z

On architectures where flush_dcache_page is not needed, we will end up generating all the code up to the PageSlab call. This is because PageSlab operates on a volatile pointer and thus cannot be optimised away. This patch works around this by checking whether flush_dcache_page is needed before we call PageSlab which then allows PageSlab to be compiled awy. Signed-off-by: Herbert Xu

crypto: scatterwalk - Add missing sg_init_table to scatterwalk_ffwd

2015-05-28T03:23:17Z

We need to call sg_init_table as otherwise the first entry may inadvertently become the last. Signed-off-by: Herbert Xu