- if (jiffies - last_empty_jifs > 1 * HZ) {
- /* unlocked list_empty() test is OK here */
- if (list_empty(&pdflush_list)) {
- /* unlocked test is OK here */
- if (nr_pdflush_threads < MAX_PDFLUSH_THREADS)
- start_one_pdflush_thread();
+ if (time_after(jiffies, last_empty_jifs + 1 * HZ)) {
+ if (list_empty(&pdflush_list) &&
+ nr_pdflush_threads < nr_pdflush_threads_max) {
+ last_empty_jifs = jiffies;
+ nr_pdflush_threads++;
+ spin_unlock_irq(&pdflush_lock);
+ start_one_pdflush_thread();
+ spin_lock_irq(&pdflush_lock);