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kernel: make_process_ready may be called with sleep_lock already acquired?

This commit is contained in:
K. Lange 2021-10-21 08:48:26 +09:00
parent 25602ba019
commit bf6d5f765d
1 changed files with 3 additions and 3 deletions
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6
kernel/sys/process.c
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@ -648,7 +648,8 @@ void process_delete(process_t * proc) {
*/
void make_process_ready(volatile process_t * proc) {
if (proc->sleep_node.owner != NULL) {
spin_lock(sleep_lock);
int sleep_lock_is_mine = sleep_lock.owner == (this_core->cpu_id = 1);
if (!sleep_lock_is_mine) spin_lock(sleep_lock);
if (proc->sleep_node.owner == sleep_queue) {
/* The sleep queue is slightly special... */
if (proc->timed_sleep_node) {
@ -656,13 +657,12 @@ void make_process_ready(volatile process_t * proc) {
proc->sleep_node.owner = NULL;
free(proc->timed_sleep_node->value);
}
spin_unlock(sleep_lock);
} else {
/* This was blocked on a semaphore we can interrupt. */
__sync_or_and_fetch(&proc->flags, PROC_FLAG_SLEEP_INT);
list_delete((list_t*)proc->sleep_node.owner, (node_t*)&proc->sleep_node);
spin_unlock(sleep_lock);
}
if (!sleep_lock_is_mine) spin_unlock(sleep_lock);
}
spin_lock(process_queue_lock);