diff options
| -rw-r--r-- | rust/helpers/atomic_ext.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/rust/helpers/atomic_ext.c b/rust/helpers/atomic_ext.c index 02e05b4246ae..3136255a84c6 100644 --- a/rust/helpers/atomic_ext.c +++ b/rust/helpers/atomic_ext.c @@ -2,6 +2,7 @@ #include <asm/barrier.h> #include <asm/rwonce.h> +#include <linux/atomic.h> __rust_helper s8 rust_helper_atomic_i8_read(s8 *ptr) { @@ -42,3 +43,20 @@ __rust_helper void rust_helper_atomic_i16_set_release(s16 *ptr, s16 val) { smp_store_release(ptr, val); } + +/* + * xchg helpers depend on ARCH_SUPPORTS_ATOMIC_RMW and on the + * architecture provding xchg() support for i8 and i16. + * + * The architectures that currently support Rust (x86_64, armv7, + * arm64, riscv, and loongarch) satisfy these requirements. + */ +__rust_helper s8 rust_helper_atomic_i8_xchg(s8 *ptr, s8 new) +{ + return xchg(ptr, new); +} + +__rust_helper s16 rust_helper_atomic_i16_xchg(s16 *ptr, s16 new) +{ + return xchg(ptr, new); +} |