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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0bc81767c5
When the ARM accelerated ChaCha driver is built as part of a configuration
that has kernel mode NEON disabled, we expect the compiler to propagate
the build time constant expression IS_ENABLED(CONFIG_KERNEL_MODE_NEON) in
a way that eliminates all the cross-object references to the actual NEON
routines, which allows the chacha-neon-core.o object to be omitted from
the build entirely.
Unfortunately, this fails to work as expected in some cases, and we may
end up with a build error such as
chacha-glue.c:(.text+0xc0): undefined reference to `chacha_4block_xor_neon'
caused by the fact that chacha_doneon() has not been eliminated from the
object code, even though it will never be called in practice.
Let's fix this by adding some IS_ENABLED(CONFIG_KERNEL_MODE_NEON) tests
that are not strictly needed from a logical point of view, but should
help the compiler infer that the NEON code paths are unreachable in
those cases.
Fixes:
|
||
|---|---|---|
| .. | ||
| .gitignore | ||
| aes-ce-core.S | ||
| aes-ce-glue.c | ||
| aes-cipher-core.S | ||
| aes-cipher-glue.c | ||
| aes-neonbs-core.S | ||
| aes-neonbs-glue.c | ||
| chacha-glue.c | ||
| chacha-neon-core.S | ||
| chacha-scalar-core.S | ||
| crc32-ce-core.S | ||
| crc32-ce-glue.c | ||
| crct10dif-ce-core.S | ||
| crct10dif-ce-glue.c | ||
| curve25519-core.S | ||
| curve25519-glue.c | ||
| ghash-ce-core.S | ||
| ghash-ce-glue.c | ||
| Kconfig | ||
| Makefile | ||
| nh-neon-core.S | ||
| nhpoly1305-neon-glue.c | ||
| poly1305-armv4.pl | ||
| poly1305-core.S_shipped | ||
| poly1305-glue.c | ||
| sha1_glue.c | ||
| sha1_neon_glue.c | ||
| sha1-armv4-large.S | ||
| sha1-armv7-neon.S | ||
| sha1-ce-core.S | ||
| sha1-ce-glue.c | ||
| sha1.h | ||
| sha2-ce-core.S | ||
| sha2-ce-glue.c | ||
| sha256_glue.c | ||
| sha256_glue.h | ||
| sha256_neon_glue.c | ||
| sha256-armv4.pl | ||
| sha256-core.S_shipped | ||
| sha512-armv4.pl | ||
| sha512-core.S_shipped | ||
| sha512-glue.c | ||
| sha512-neon-glue.c | ||
| sha512.h | ||