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crypto: zstd - Add zstd support

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Adds zstd support to crypto and scompress. Only supports the default
level.

Previously we held off on this patch, since there weren't any users.
Now zram is ready for zstd support, but depends on CONFIG_CRYPTO_ZSTD,
which isn't defined until this patch is in. I also see a patch adding
zstd to pstore [0], which depends on crypto zstd.

[0] lkml.kernel.org/r/9c9416b2dff19f05fb4c35879aaa83d11ff72c92.1521626182.git.geliangtang@gmail.com

Signed-off-by: Nick Terrell <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Nick Terrell 2018-03-30 12:14:53 -07:00 • committed by Herbert Xu
commit d28fc3dbe1
5 changed files with 356 additions and 0 deletions
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9
crypto/Kconfig
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@ -1695,6 +1695,15 @@ config CRYPTO_LZ4HC
help
This is the LZ4 high compression mode algorithm.
config CRYPTO_ZSTD
tristate "Zstd compression algorithm"
select CRYPTO_ALGAPI
select CRYPTO_ACOMP2
select ZSTD_COMPRESS
select ZSTD_DECOMPRESS
help
This is the zstd algorithm.
comment "Random Number Generation"
config CRYPTO_ANSI_CPRNG