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Warn for unused results

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Imbus 2025-08-18 11:17:10 +02:00
parent 1aed6c0715
commit ee2ddd7e8c
2 changed files with 2 additions and 1 deletions
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2
kern/ispinlock.c
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@ -4,7 +4,7 @@ void spinlock_init(spinlock_t *l) {
l->v = 0;
}
bool spin_trylock(spinlock_t *l) {
__attribute__((warn_unused_result)) bool spin_trylock(spinlock_t *l) {
uint32_t old;
// old = xchg_acquire(&l->v, 1) using AMO
__asm__ volatile("amoswap.w.aq %0, %2, (%1)\n" : "=&r"(old) : "r"(&l->v), "r"(1u) : "memory");