apm821xx: switch out kernel's CRC32 method

This patch replaces the OpenWrt' favoured
CRC32 Sarwate algorithm with the kernel
recommended SLICE8 CRC32 version.

This change alone lifted btrfs writes from 40 MiB/s
to 54 MiB/s on my My Book Live (SLICE4 managed 48 MiB/s).

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

diff --git a/target/linux/apm821xx/config-4.14 b/target/linux/apm821xx/config-4.14
index a70c95753da5ca706f7a08edbd0075e74feb6a11..ccc59b294d6d14aee75b78791463ce3afdb23810 100644 (file)
--- a/target/linux/apm821xx/config-4.14
+++ b/target/linux/apm821xx/config-4.14
@@ -56,6 +56,8 @@ CONFIG_CMDLINE_BOOL=y
 CONFIG_CONSISTENT_SIZE=0x00200000
 CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_CRC16=y
+# CONFIG_CRC32_SARWATE is not set
+CONFIG_CRC32_SLICEBY8=y
 CONFIG_CRYPTO_ACOMP2=y
 CONFIG_CRYPTO_AEAD=y
 CONFIG_CRYPTO_AEAD2=y

diff --git a/target/linux/apm821xx/config-4.19 b/target/linux/apm821xx/config-4.19
index 3f57ec6b8337731c0ac06957c56c6145d1e62c54..358eb3c716b07b125bd86b505504ce5e8bba494f 100644 (file)
--- a/target/linux/apm821xx/config-4.19
+++ b/target/linux/apm821xx/config-4.19
@@ -60,6 +60,8 @@ CONFIG_CONSISTENT_SIZE=0x00200000
 CONFIG_CONSOLE_LOGLEVEL_QUIET=4
 CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_CRC16=y
+# CONFIG_CRC32_SARWATE is not set
+CONFIG_CRC32_SLICEBY8=y
 CONFIG_CRYPTO_ACOMP2=y
 CONFIG_CRYPTO_AEAD=y
 CONFIG_CRYPTO_AEAD2=y