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spinlock only restore RFLAGS IF flag

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This commit is contained in:
Kamil Kowalczyk
2025-09-20 00:55:18 +02:00
parent dcc68154b2
commit 8269e097d6
1 changed files with 4 additions and 2 deletions
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6
kernel/spinlock/spinlock.c
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@ -12,12 +12,14 @@ void spinlock_init(SpinLock *sl) {
uint64_t spinlock_irqsave(void) { uint64_t spinlock_irqsave(void) {
uint64_t flags; uint64_t flags;
asm volatile("pushfq; cli; popq %0" : "=r"(flags)); asm volatile("pushfq; cli; popq %0" : "=r"(flags) :: "memory");
return flags; return flags;
} }
void spinlock_irqrestore(uint64_t flags) { void spinlock_irqrestore(uint64_t flags) {
asm volatile("pushq %0; popfq" :: "r"(flags)); if (flags & (1<<9)) {
asm volatile("sti" ::: "memory");
}
} }
void spinlock_acquire(SpinLock *sl) { void spinlock_acquire(SpinLock *sl) {