tree 01c418078a78ff8049bf5eb7bc36cf3e3bddcb14
parent 09a49afeae2542993d4cdc5d7af22abdfce7a3ba
author Paolo Bonzini <pbonzini@redhat.com> 1677850671 +0100
committer Paolo Bonzini <pbonzini@redhat.com> 1686037334 +0200

atomics: eliminate mb_read/mb_set

qatomic_mb_read and qatomic_mb_set were the very first atomic primitives
introduced for QEMU; their semantics are unclear and they provide a false
sense of safety.

The last use of qatomic_mb_read() has been removed, so delete it.
qatomic_mb_set() instead can survive as an optimized
qatomic_set()+smp_mb(), similar to Linux's smp_store_mb(), but
rename it to qatomic_set_mb() to match the order of the two
operations.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>