mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-20 00:11:22 +00:00
bcache: Drop some closure stuff
With a the recent bcache refactoring, some of the closure code isn't needed anymore. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
This commit is contained in:
Kent Overstreet
parent
b54d6934da
commit
faadf0c965
@ -407,7 +407,7 @@ static void do_btree_node_write(struct btree *b)
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b->bio = bch_bbio_alloc(b->c);
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b->bio->bi_end_io = btree_node_write_endio;
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b->bio->bi_private = &b->io.cl;
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b->bio->bi_private = cl;
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b->bio->bi_rw = REQ_META|WRITE_SYNC|REQ_FUA;
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b->bio->bi_size = set_blocks(i, b->c) * block_bytes(b->c);
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bch_bio_map(b->bio, i);
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@ -672,8 +672,8 @@ static int mca_reap(struct btree *b, unsigned min_order, bool flush)
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}
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/* wait for any in flight btree write */
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closure_wait_event_sync(&b->io.wait, &cl,
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atomic_read(&b->io.cl.remaining) == -1);
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closure_wait_event(&b->io.wait, &cl,
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atomic_read(&b->io.cl.remaining) == -1);
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return 0;
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}
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@ -11,17 +11,6 @@
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#include "closure.h"
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void closure_queue(struct closure *cl)
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{
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struct workqueue_struct *wq = cl->wq;
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if (wq) {
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INIT_WORK(&cl->work, cl->work.func);
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BUG_ON(!queue_work(wq, &cl->work));
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} else
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cl->fn(cl);
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}
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EXPORT_SYMBOL_GPL(closure_queue);
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#define CL_FIELD(type, field) \
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case TYPE_ ## type: \
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return &container_of(cl, struct type, cl)->field
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@ -30,17 +19,6 @@ static struct closure_waitlist *closure_waitlist(struct closure *cl)
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{
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switch (cl->type) {
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CL_FIELD(closure_with_waitlist, wait);
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CL_FIELD(closure_with_waitlist_and_timer, wait);
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default:
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return NULL;
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}
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}
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static struct timer_list *closure_timer(struct closure *cl)
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{
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switch (cl->type) {
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CL_FIELD(closure_with_timer, timer);
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CL_FIELD(closure_with_waitlist_and_timer, timer);
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default:
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return NULL;
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}
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@ -51,7 +29,7 @@ static inline void closure_put_after_sub(struct closure *cl, int flags)
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int r = flags & CLOSURE_REMAINING_MASK;
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BUG_ON(flags & CLOSURE_GUARD_MASK);
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BUG_ON(!r && (flags & ~(CLOSURE_DESTRUCTOR|CLOSURE_BLOCKING)));
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BUG_ON(!r && (flags & ~CLOSURE_DESTRUCTOR));
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/* Must deliver precisely one wakeup */
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if (r == 1 && (flags & CLOSURE_SLEEPING))
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@ -59,7 +37,6 @@ static inline void closure_put_after_sub(struct closure *cl, int flags)
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if (!r) {
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if (cl->fn && !(flags & CLOSURE_DESTRUCTOR)) {
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/* CLOSURE_BLOCKING might be set - clear it */
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atomic_set(&cl->remaining,
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CLOSURE_REMAINING_INITIALIZER);
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closure_queue(cl);
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@ -90,13 +67,13 @@ void closure_sub(struct closure *cl, int v)
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{
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closure_put_after_sub(cl, atomic_sub_return(v, &cl->remaining));
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}
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EXPORT_SYMBOL_GPL(closure_sub);
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EXPORT_SYMBOL(closure_sub);
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void closure_put(struct closure *cl)
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{
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closure_put_after_sub(cl, atomic_dec_return(&cl->remaining));
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}
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EXPORT_SYMBOL_GPL(closure_put);
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EXPORT_SYMBOL(closure_put);
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static void set_waiting(struct closure *cl, unsigned long f)
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{
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@ -133,7 +110,7 @@ void __closure_wake_up(struct closure_waitlist *wait_list)
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closure_sub(cl, CLOSURE_WAITING + 1);
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}
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}
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EXPORT_SYMBOL_GPL(__closure_wake_up);
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EXPORT_SYMBOL(__closure_wake_up);
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bool closure_wait(struct closure_waitlist *list, struct closure *cl)
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{
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@ -146,7 +123,7 @@ bool closure_wait(struct closure_waitlist *list, struct closure *cl)
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return true;
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}
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EXPORT_SYMBOL_GPL(closure_wait);
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EXPORT_SYMBOL(closure_wait);
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/**
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* closure_sync() - sleep until a closure a closure has nothing left to wait on
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@ -169,7 +146,7 @@ void closure_sync(struct closure *cl)
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__closure_end_sleep(cl);
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}
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EXPORT_SYMBOL_GPL(closure_sync);
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EXPORT_SYMBOL(closure_sync);
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/**
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* closure_trylock() - try to acquire the closure, without waiting
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@ -183,17 +160,17 @@ bool closure_trylock(struct closure *cl, struct closure *parent)
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CLOSURE_REMAINING_INITIALIZER) != -1)
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return false;
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closure_set_ret_ip(cl);
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smp_mb();
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cl->parent = parent;
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if (parent)
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closure_get(parent);
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closure_set_ret_ip(cl);
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closure_debug_create(cl);
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return true;
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}
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EXPORT_SYMBOL_GPL(closure_trylock);
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EXPORT_SYMBOL(closure_trylock);
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void __closure_lock(struct closure *cl, struct closure *parent,
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struct closure_waitlist *wait_list)
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@ -205,57 +182,11 @@ void __closure_lock(struct closure *cl, struct closure *parent,
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if (closure_trylock(cl, parent))
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return;
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closure_wait_event_sync(wait_list, &wait,
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atomic_read(&cl->remaining) == -1);
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closure_wait_event(wait_list, &wait,
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atomic_read(&cl->remaining) == -1);
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}
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}
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EXPORT_SYMBOL_GPL(__closure_lock);
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static void closure_delay_timer_fn(unsigned long data)
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{
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struct closure *cl = (struct closure *) data;
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closure_sub(cl, CLOSURE_TIMER + 1);
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}
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void do_closure_timer_init(struct closure *cl)
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{
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struct timer_list *timer = closure_timer(cl);
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init_timer(timer);
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timer->data = (unsigned long) cl;
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timer->function = closure_delay_timer_fn;
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}
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EXPORT_SYMBOL_GPL(do_closure_timer_init);
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bool __closure_delay(struct closure *cl, unsigned long delay,
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struct timer_list *timer)
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{
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if (atomic_read(&cl->remaining) & CLOSURE_TIMER)
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return false;
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BUG_ON(timer_pending(timer));
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timer->expires = jiffies + delay;
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atomic_add(CLOSURE_TIMER + 1, &cl->remaining);
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add_timer(timer);
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return true;
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}
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EXPORT_SYMBOL_GPL(__closure_delay);
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void __closure_flush(struct closure *cl, struct timer_list *timer)
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{
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if (del_timer(timer))
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closure_sub(cl, CLOSURE_TIMER + 1);
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}
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EXPORT_SYMBOL_GPL(__closure_flush);
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void __closure_flush_sync(struct closure *cl, struct timer_list *timer)
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{
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if (del_timer_sync(timer))
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closure_sub(cl, CLOSURE_TIMER + 1);
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}
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EXPORT_SYMBOL_GPL(__closure_flush_sync);
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EXPORT_SYMBOL(__closure_lock);
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#ifdef CONFIG_BCACHE_CLOSURES_DEBUG
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@ -273,7 +204,7 @@ void closure_debug_create(struct closure *cl)
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list_add(&cl->all, &closure_list);
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spin_unlock_irqrestore(&closure_list_lock, flags);
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}
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EXPORT_SYMBOL_GPL(closure_debug_create);
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EXPORT_SYMBOL(closure_debug_create);
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void closure_debug_destroy(struct closure *cl)
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{
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@ -286,7 +217,7 @@ void closure_debug_destroy(struct closure *cl)
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list_del(&cl->all);
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spin_unlock_irqrestore(&closure_list_lock, flags);
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}
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EXPORT_SYMBOL_GPL(closure_debug_destroy);
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EXPORT_SYMBOL(closure_debug_destroy);
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static struct dentry *debug;
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@ -304,14 +235,12 @@ static int debug_seq_show(struct seq_file *f, void *data)
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cl, (void *) cl->ip, cl->fn, cl->parent,
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r & CLOSURE_REMAINING_MASK);
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seq_printf(f, "%s%s%s%s%s%s\n",
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seq_printf(f, "%s%s%s%s\n",
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test_bit(WORK_STRUCT_PENDING,
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work_data_bits(&cl->work)) ? "Q" : "",
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r & CLOSURE_RUNNING ? "R" : "",
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r & CLOSURE_BLOCKING ? "B" : "",
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r & CLOSURE_STACK ? "S" : "",
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r & CLOSURE_SLEEPING ? "Sl" : "",
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r & CLOSURE_TIMER ? "T" : "");
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r & CLOSURE_SLEEPING ? "Sl" : "");
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if (r & CLOSURE_WAITING)
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seq_printf(f, " W %pF\n",
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@ -155,21 +155,6 @@
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* delayed_work embeds a work item and a timer_list. The important thing is, use
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* it exactly like you would a regular closure and closure_put() will magically
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* handle everything for you.
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*
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* We've got closures that embed timers, too. They're called, appropriately
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* enough:
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* struct closure_with_timer;
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*
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* This gives you access to closure_delay(). It takes a refcount for a specified
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* number of jiffies - you could then call closure_sync() (for a slightly
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* convoluted version of msleep()) or continue_at() - which gives you the same
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* effect as using a delayed work item, except you can reuse the work_struct
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* already embedded in struct closure.
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*
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* Lastly, there's struct closure_with_waitlist_and_timer. It does what you
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* probably expect, if you happen to need the features of both. (You don't
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* really want to know how all this is implemented, but if I've done my job
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* right you shouldn't have to care).
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*/
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struct closure;
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@ -182,16 +167,11 @@ struct closure_waitlist {
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enum closure_type {
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TYPE_closure = 0,
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TYPE_closure_with_waitlist = 1,
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TYPE_closure_with_timer = 2,
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TYPE_closure_with_waitlist_and_timer = 3,
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MAX_CLOSURE_TYPE = 3,
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MAX_CLOSURE_TYPE = 1,
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};
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enum closure_state {
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/*
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* CLOSURE_BLOCKING: Causes closure_wait_event() to block, instead of
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* waiting asynchronously
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*
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* CLOSURE_WAITING: Set iff the closure is on a waitlist. Must be set by
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* the thread that owns the closure, and cleared by the thread that's
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* waking up the closure.
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@ -200,10 +180,6 @@ enum closure_state {
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* - indicates that cl->task is valid and closure_put() may wake it up.
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* Only set or cleared by the thread that owns the closure.
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*
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* CLOSURE_TIMER: Analagous to CLOSURE_WAITING, indicates that a closure
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* has an outstanding timer. Must be set by the thread that owns the
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* closure, and cleared by the timer function when the timer goes off.
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*
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* The rest are for debugging and don't affect behaviour:
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*
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* CLOSURE_RUNNING: Set when a closure is running (i.e. by
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@ -218,19 +194,17 @@ enum closure_state {
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* closure with this flag set
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*/
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CLOSURE_BITS_START = (1 << 19),
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CLOSURE_DESTRUCTOR = (1 << 19),
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CLOSURE_BLOCKING = (1 << 21),
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CLOSURE_WAITING = (1 << 23),
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CLOSURE_SLEEPING = (1 << 25),
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CLOSURE_TIMER = (1 << 27),
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CLOSURE_BITS_START = (1 << 23),
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CLOSURE_DESTRUCTOR = (1 << 23),
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CLOSURE_WAITING = (1 << 25),
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CLOSURE_SLEEPING = (1 << 27),
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CLOSURE_RUNNING = (1 << 29),
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CLOSURE_STACK = (1 << 31),
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};
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#define CLOSURE_GUARD_MASK \
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((CLOSURE_DESTRUCTOR|CLOSURE_BLOCKING|CLOSURE_WAITING| \
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CLOSURE_SLEEPING|CLOSURE_TIMER|CLOSURE_RUNNING|CLOSURE_STACK) << 1)
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((CLOSURE_DESTRUCTOR|CLOSURE_WAITING|CLOSURE_SLEEPING| \
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CLOSURE_RUNNING|CLOSURE_STACK) << 1)
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#define CLOSURE_REMAINING_MASK (CLOSURE_BITS_START - 1)
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#define CLOSURE_REMAINING_INITIALIZER (1|CLOSURE_RUNNING)
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@ -268,17 +242,6 @@ struct closure_with_waitlist {
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struct closure_waitlist wait;
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};
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struct closure_with_timer {
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struct closure cl;
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struct timer_list timer;
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};
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struct closure_with_waitlist_and_timer {
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struct closure cl;
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struct closure_waitlist wait;
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struct timer_list timer;
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};
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extern unsigned invalid_closure_type(void);
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#define __CLOSURE_TYPE(cl, _t) \
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@ -289,14 +252,11 @@ extern unsigned invalid_closure_type(void);
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( \
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__CLOSURE_TYPE(cl, closure) \
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__CLOSURE_TYPE(cl, closure_with_waitlist) \
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__CLOSURE_TYPE(cl, closure_with_timer) \
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__CLOSURE_TYPE(cl, closure_with_waitlist_and_timer) \
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invalid_closure_type() \
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)
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void closure_sub(struct closure *cl, int v);
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void closure_put(struct closure *cl);
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void closure_queue(struct closure *cl);
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void __closure_wake_up(struct closure_waitlist *list);
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bool closure_wait(struct closure_waitlist *list, struct closure *cl);
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void closure_sync(struct closure *cl);
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@ -305,12 +265,6 @@ bool closure_trylock(struct closure *cl, struct closure *parent);
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void __closure_lock(struct closure *cl, struct closure *parent,
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struct closure_waitlist *wait_list);
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void do_closure_timer_init(struct closure *cl);
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bool __closure_delay(struct closure *cl, unsigned long delay,
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struct timer_list *timer);
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void __closure_flush(struct closure *cl, struct timer_list *timer);
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void __closure_flush_sync(struct closure *cl, struct timer_list *timer);
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#ifdef CONFIG_BCACHE_CLOSURES_DEBUG
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void closure_debug_init(void);
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@ -354,11 +308,6 @@ static inline void closure_set_stopped(struct closure *cl)
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atomic_sub(CLOSURE_RUNNING, &cl->remaining);
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}
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static inline bool closure_is_stopped(struct closure *cl)
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{
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return !(atomic_read(&cl->remaining) & CLOSURE_RUNNING);
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}
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static inline bool closure_is_unlocked(struct closure *cl)
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{
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return atomic_read(&cl->remaining) == -1;
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@ -367,14 +316,6 @@ static inline bool closure_is_unlocked(struct closure *cl)
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static inline void do_closure_init(struct closure *cl, struct closure *parent,
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bool running)
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{
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switch (cl->type) {
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case TYPE_closure_with_timer:
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case TYPE_closure_with_waitlist_and_timer:
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do_closure_timer_init(cl);
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default:
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break;
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}
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cl->parent = parent;
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if (parent)
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closure_get(parent);
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@ -429,8 +370,7 @@ do { \
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static inline void closure_init_stack(struct closure *cl)
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{
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memset(cl, 0, sizeof(struct closure));
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atomic_set(&cl->remaining, CLOSURE_REMAINING_INITIALIZER|
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CLOSURE_BLOCKING|CLOSURE_STACK);
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atomic_set(&cl->remaining, CLOSURE_REMAINING_INITIALIZER|CLOSURE_STACK);
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}
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/**
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@ -461,24 +401,6 @@ do { \
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#define closure_lock(cl, parent) \
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__closure_lock(__to_internal_closure(cl), parent, &(cl)->wait)
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/**
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* closure_delay() - delay some number of jiffies
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* @cl: the closure that will sleep
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* @delay: the delay in jiffies
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*
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* Takes a refcount on @cl which will be released after @delay jiffies; this may
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* be used to have a function run after a delay with continue_at(), or
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* closure_sync() may be used for a convoluted version of msleep().
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*/
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#define closure_delay(cl, delay) \
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__closure_delay(__to_internal_closure(cl), delay, &(cl)->timer)
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#define closure_flush(cl) \
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__closure_flush(__to_internal_closure(cl), &(cl)->timer)
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#define closure_flush_sync(cl) \
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__closure_flush_sync(__to_internal_closure(cl), &(cl)->timer)
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static inline void __closure_end_sleep(struct closure *cl)
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{
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__set_current_state(TASK_RUNNING);
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@ -497,40 +419,6 @@ static inline void __closure_start_sleep(struct closure *cl)
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atomic_add(CLOSURE_SLEEPING, &cl->remaining);
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}
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/**
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* closure_blocking() - returns true if the closure is in blocking mode.
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*
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* If a closure is in blocking mode, closure_wait_event() will sleep until the
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* condition is true instead of waiting asynchronously.
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*/
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static inline bool closure_blocking(struct closure *cl)
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{
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return atomic_read(&cl->remaining) & CLOSURE_BLOCKING;
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}
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/**
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* set_closure_blocking() - put a closure in blocking mode.
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*
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* If a closure is in blocking mode, closure_wait_event() will sleep until the
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* condition is true instead of waiting asynchronously.
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*
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* Not thread safe - can only be called by the thread running the closure.
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*/
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static inline void set_closure_blocking(struct closure *cl)
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{
|
||||
if (!closure_blocking(cl))
|
||||
atomic_add(CLOSURE_BLOCKING, &cl->remaining);
|
||||
}
|
||||
|
||||
/*
|
||||
* Not thread safe - can only be called by the thread running the closure.
|
||||
*/
|
||||
static inline void clear_closure_blocking(struct closure *cl)
|
||||
{
|
||||
if (closure_blocking(cl))
|
||||
atomic_sub(CLOSURE_BLOCKING, &cl->remaining);
|
||||
}
|
||||
|
||||
/**
|
||||
* closure_wake_up() - wake up all closures on a wait list.
|
||||
*/
|
||||
@ -561,63 +449,36 @@ static inline void closure_wake_up(struct closure_waitlist *list)
|
||||
* refcount on our closure. If this was a stack allocated closure, that would be
|
||||
* bad.
|
||||
*/
|
||||
#define __closure_wait_event(list, cl, condition, _block) \
|
||||
#define closure_wait_event(list, cl, condition) \
|
||||
({ \
|
||||
bool block = _block; \
|
||||
typeof(condition) ret; \
|
||||
\
|
||||
while (1) { \
|
||||
ret = (condition); \
|
||||
if (ret) { \
|
||||
__closure_wake_up(list); \
|
||||
if (block) \
|
||||
closure_sync(cl); \
|
||||
\
|
||||
closure_sync(cl); \
|
||||
break; \
|
||||
} \
|
||||
\
|
||||
if (block) \
|
||||
__closure_start_sleep(cl); \
|
||||
\
|
||||
if (!closure_wait(list, cl)) { \
|
||||
if (!block) \
|
||||
break; \
|
||||
__closure_start_sleep(cl); \
|
||||
\
|
||||
if (!closure_wait(list, cl)) \
|
||||
schedule(); \
|
||||
} \
|
||||
} \
|
||||
\
|
||||
ret; \
|
||||
})
|
||||
|
||||
/**
|
||||
* closure_wait_event() - wait on a condition, synchronously or asynchronously.
|
||||
* @list: the wait list to wait on
|
||||
* @cl: the closure that is doing the waiting
|
||||
* @condition: a C expression for the event to wait for
|
||||
*
|
||||
* If the closure is in blocking mode, sleeps until the @condition evaluates to
|
||||
* true - exactly like wait_event().
|
||||
*
|
||||
* If the closure is not in blocking mode, waits asynchronously; if the
|
||||
* condition is currently false the @cl is put onto @list and returns. @list
|
||||
* owns a refcount on @cl; closure_sync() or continue_at() may be used later to
|
||||
* wait for another thread to wake up @list, which drops the refcount on @cl.
|
||||
*
|
||||
* Returns the value of @condition; @cl will be on @list iff @condition was
|
||||
* false.
|
||||
*
|
||||
* closure_wake_up(@list) must be called after changing any variable that could
|
||||
* cause @condition to become true.
|
||||
*/
|
||||
#define closure_wait_event(list, cl, condition) \
|
||||
__closure_wait_event(list, cl, condition, closure_blocking(cl))
|
||||
|
||||
#define closure_wait_event_async(list, cl, condition) \
|
||||
__closure_wait_event(list, cl, condition, false)
|
||||
|
||||
#define closure_wait_event_sync(list, cl, condition) \
|
||||
__closure_wait_event(list, cl, condition, true)
|
||||
static inline void closure_queue(struct closure *cl)
|
||||
{
|
||||
struct workqueue_struct *wq = cl->wq;
|
||||
if (wq) {
|
||||
INIT_WORK(&cl->work, cl->work.func);
|
||||
BUG_ON(!queue_work(wq, &cl->work));
|
||||
} else
|
||||
cl->fn(cl);
|
||||
}
|
||||
|
||||
static inline void set_closure_fn(struct closure *cl, closure_fn *fn,
|
||||
struct workqueue_struct *wq)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user