Commit a92236bf authored by Boqun Feng's avatar Boqun Feng Committed by Peter Zijlstra
Browse files

rust: helpers: Generify the definitions of rust_helper_*_cmpxchg* 



To support atomic pointers, more cmpxchg helpers will be introduced,
hence define macros to generate these helpers to ease the introduction
of the future helpers.

Signed-off-by: default avatarBoqun Feng <boqun.feng@gmail.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260117122243.24404-4-boqun.feng@gmail.com
Link: https://patch.msgid.link/20260303201701.12204-6-boqun@kernel.org
parent f92d22b0

rust/helpers/atomic_ext.c

+12 −36
Original line number Diff line number Diff line
@@ -67,42 +67,18 @@ GEN_XCHG_HELPERS(i16, s16) 
 * The architectures that currently support Rust (x86_64, armv7,

 * arm64, riscv, and loongarch) satisfy these requirements.

 */

__rust_helper bool rust_helper_atomic_i8_try_cmpxchg(s8 *ptr, s8 *old, s8 new)

{

	return try_cmpxchg(ptr, old, new);

}



__rust_helper bool rust_helper_atomic_i16_try_cmpxchg(s16 *ptr, s16 *old, s16 new)

{

	return try_cmpxchg(ptr, old, new);

}



__rust_helper bool rust_helper_atomic_i8_try_cmpxchg_acquire(s8 *ptr, s8 *old, s8 new)

{

	return try_cmpxchg_acquire(ptr, old, new);

}



__rust_helper bool rust_helper_atomic_i16_try_cmpxchg_acquire(s16 *ptr, s16 *old, s16 new)

{

	return try_cmpxchg_acquire(ptr, old, new);

}



__rust_helper bool rust_helper_atomic_i8_try_cmpxchg_release(s8 *ptr, s8 *old, s8 new)

{

	return try_cmpxchg_release(ptr, old, new);

}



__rust_helper bool rust_helper_atomic_i16_try_cmpxchg_release(s16 *ptr, s16 *old, s16 new)

{

	return try_cmpxchg_release(ptr, old, new);

#define GEN_TRY_CMPXCHG_HELPER(tname, type, suffix)				\

__rust_helper bool								\

rust_helper_atomic_##tname##_try_cmpxchg##suffix(type *ptr, type *old, type new)\

{										\

	return try_cmpxchg##suffix(ptr, old, new);				\

}



__rust_helper bool rust_helper_atomic_i8_try_cmpxchg_relaxed(s8 *ptr, s8 *old, s8 new)

{

	return try_cmpxchg_relaxed(ptr, old, new);

}

#define GEN_TRY_CMPXCHG_HELPERS(tname, type)					\

	GEN_TRY_CMPXCHG_HELPER(tname, type, )					\

	GEN_TRY_CMPXCHG_HELPER(tname, type, _acquire)				\

	GEN_TRY_CMPXCHG_HELPER(tname, type, _release)				\

	GEN_TRY_CMPXCHG_HELPER(tname, type, _relaxed)				\



__rust_helper bool rust_helper_atomic_i16_try_cmpxchg_relaxed(s16 *ptr, s16 *old, s16 new)

{

	return try_cmpxchg_relaxed(ptr, old, new);

}
 
GEN_TRY_CMPXCHG_HELPERS(i8, s8)

GEN_TRY_CMPXCHG_HELPERS(i16, s16)