kernel/linux.git/include/crypto/scatterwalk.h, branch v6.6.131

crypto: scatterwalk - use kmap_local() not kmap_atomic()

2022-12-30T14:56:27+00:00

kmap_atomic() is used to create short-lived mappings of pages that may not be accessible via the kernel direct map. This is only needed on 32-bit architectures that implement CONFIG_HIGHMEM, but it can be used on 64-bit other architectures too, where the returned mapping is simply the kernel direct address of the page. However, kmap_atomic() does not support migration on CONFIG_HIGHMEM configurations, due to the use of per-CPU kmap slots, and so it disables preemption on all architectures, not just the 32-bit ones. This implies that all scatterwalk based crypto routines essentially execute with preemption disabled all the time, which is less than ideal. So let's switch scatterwalk_map/_unmap and the shash/ahash routines to kmap_local() instead, which serves a similar purpose, but without the resulting impact on preemption on architectures that have no need for CONFIG_HIGHMEM. Cc: Eric Biggers Cc: Herbert Xu Cc: "Elliott, Robert (Servers)" Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu

crypto: scatterwalk - remove duplicate function declarations

2022-10-21T11:05:24+00:00

scatterwalk_map() is an inline function already defined in the header file, it is necessary to delete the re-declaration at the same location, which was left out in the header file by an earlier modification. Signed-off-by: Tianjia Zhang Signed-off-by: Herbert Xu

crypto: scatterwalk - Remove unused inline function scatterwalk_aligned()

2022-09-30T05:59:13+00:00

The scatterwalk_aligned() are no longer used since removing blkcipher and ablkcipher support, all use of it has been removed since commit d63007eb954e ("crypto: ablkcipher - remove deprecated and unused ablkcipher support"), so remove it. Signed-off-by: Gaosheng Cui Signed-off-by: Herbert Xu

crypto: api - Replace kernel.h with the necessary inclusions

2021-12-17T05:59:48+00:00

When kernel.h is used in the headers it adds a lot into dependency hell, especially when there are circular dependencies are involved. Replace kernel.h inclusion with the list of what is really being used. Signed-off-by: Andy Shevchenko Signed-off-by: Herbert Xu

crypto: scatterwalk - Remove obsolete PageSlab check

2021-06-28T03:28:08+00:00

As it is now legal to call flush_dcache_page on slab pages we no longer need to do the check in the Crypto API. Reported-by: Ira Weiny Signed-off-by: Herbert Xu

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

crypto: scatterwalk - remove scatterwalk_samebuf()

2018-08-03T10:06:04+00:00

scatterwalk_samebuf() is never used. Remove it. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu

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

2018-08-03T10:06:03+00:00

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 - Inline start/map/done

2016-07-18T09:35:50+00:00

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 scatterwalk_bytes_sglen

2016-07-18T09:35:48+00:00

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