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Inline nops in spinlock spin routine

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This commit is contained in:
Imbus 2025-08-27 22:07:30 +02:00
parent ee2ddd7e8c
commit 265a388c93
2 changed files with 1 additions and 2 deletions
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2
kern/ispinlock.c
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@ -19,7 +19,7 @@ void spin_unlock(spinlock_t *l) {
// Optional: tiny pause/backoff (works even if Zihintpause isn't present). // Optional: tiny pause/backoff (works even if Zihintpause isn't present).
// See: https://github.com/riscv/riscv-isa-manual/blob/main/src/zihintpause.adoc // See: https://github.com/riscv/riscv-isa-manual/blob/main/src/zihintpause.adoc
void cpu_relax(void) { static inline void cpu_relax(void) {
#if defined(__riscv_zihintpause) #if defined(__riscv_zihintpause)
__asm__ volatile("pause"); __asm__ volatile("pause");
#else #else

1
kern/ispinlock.h
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@ -8,5 +8,4 @@ typedef struct {
void spinlock_init(spinlock_t *l); void spinlock_init(spinlock_t *l);
bool spin_trylock(spinlock_t *l); bool spin_trylock(spinlock_t *l);
void spin_unlock(spinlock_t *l); void spin_unlock(spinlock_t *l);
void cpu_relax(void);
void spin_lock(spinlock_t *l); void spin_lock(spinlock_t *l);