riscv/cmpxchg: Deduplicate cmpxchg() asm and macros

Browse source

In this header every cmpxchg define (_relaxed, _acquire, _release,
vanilla) contain it's own asm file, both for 4-byte variables an 8-byte
variables, on a total of 8 versions of mostly the same asm.

This is usually bad, as it means any change may be done in up to 8
different places.

Unify those versions by creating a new define with enough parameters to
generate any version of the previous 8.

Then unify the result under a more general define, and simplify
arch_cmpxchg* generation

(This did not cause any change in generated asm)

Signed-off-by: Leonardo Bras <leobras@redhat.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Andrea Parri <parri.andrea@gmail.com>
Tested-by: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/r/20240103163203.72768-4-leobras@redhat.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

...

This commit is contained in:

Leonardo Bras 2024-01-03 13:32:00 -03:00 • committed by Palmer Dabbelt

parent 4bfa185fe3

commit 07a0a41cb7

No known key found for this signature in database

GPG key ID: 2E1319F35FBB1889

1 changed files with 33 additions and 162 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

199

arch/riscv/include/asm/cmpxchg.h

View file