zstd: support external sequence producer API #4
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Cherry-picks support for using zstd's external sequence producer API in the kernel. This unblocks the use of QuickAssist hardware acceleration for zstd in applications such as BTRFS. Three upstream PRs are included in this cherry-pick: * PR #3839: move ESP params into `ZSTD_CCtx_params` * PR #3854: add `ZSTD_CCtxParams_registerSequenceProducer` * PR #4064: expose relevant functions so they can be used in Linux To build this commit, I first cherry-picked the relevant upstream commits onto the upstream v1.5.5-kernel tag: ``` cd ~/repos/zstd git checkout tags/v1.5.5-kernel git cherry-pick -m 1 126ec2669c927b24acd38ea903a211c1b5416588 git cherry-pick c6cabf94417d84ebb5da62e05d8b8a9623763585 git cherry-pick 3242ac598e6f17d8008f6110337a3b4c1205842b ``` I then ran "make import" to copy the changes into my fork of Linux: ``` cd ~/repos/zstd/contrib/linux-kernel/ make import ``` Finally, I reverted an unrelated change which was pulled in by the import: ``` cd ~/repos/linux git commit git checkout HEAD^1 -- lib/zstd/common/debug.c git commit --amend ``` This unrelated change occurred due to a patch in zstd-next which was slightly modified when it landed upstream (post-1.5.5 release). I verified that the debug.c change is the only patch in zstd-next which is not a direct cherrypick from upstream. Signed-off-by: Elliot Gorokhovsky <[email protected]>
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