Refactor the bcachefs code to remove multiple redundant declarations of
min_heap_callbacks, ensuring that each unique declaration appears only
once.

Link: 
https://lore.kernel.org/20241017095520.gv16...@noisy.programming.kicks-ass.net
Suggested-by: Peter Zijlstra <pet...@infradead.org>
Signed-off-by: Kuan-Wei Chiu <visitor...@gmail.com>
---
 fs/bcachefs/clock.c | 19 +++++--------------
 fs/bcachefs/ec.c    | 19 +++++--------------
 2 files changed, 10 insertions(+), 28 deletions(-)

diff --git a/fs/bcachefs/clock.c b/fs/bcachefs/clock.c
index 1d6b691e8da6..1fcfcb5fd44f 100644
--- a/fs/bcachefs/clock.c
+++ b/fs/bcachefs/clock.c
@@ -22,13 +22,13 @@ static inline void io_timer_swp(void *l, void *r, void 
__always_unused *args)
        swap(*_l, *_r);
 }
 
+static const struct min_heap_callbacks callbacks = {
+       .less = io_timer_cmp,
+       .swp = io_timer_swp,
+};
+
 void bch2_io_timer_add(struct io_clock *clock, struct io_timer *timer)
 {
-       const struct min_heap_callbacks callbacks = {
-               .less = io_timer_cmp,
-               .swp = io_timer_swp,
-       };
-
        spin_lock(&clock->timer_lock);
 
        if (time_after_eq64((u64) atomic64_read(&clock->now), timer->expire)) {
@@ -48,11 +48,6 @@ void bch2_io_timer_add(struct io_clock *clock, struct 
io_timer *timer)
 
 void bch2_io_timer_del(struct io_clock *clock, struct io_timer *timer)
 {
-       const struct min_heap_callbacks callbacks = {
-               .less = io_timer_cmp,
-               .swp = io_timer_swp,
-       };
-
        spin_lock(&clock->timer_lock);
 
        for (size_t i = 0; i < clock->timers.nr; i++)
@@ -142,10 +137,6 @@ void bch2_kthread_io_clock_wait(struct io_clock *clock,
 static struct io_timer *get_expired_timer(struct io_clock *clock, u64 now)
 {
        struct io_timer *ret = NULL;
-       const struct min_heap_callbacks callbacks = {
-               .less = io_timer_cmp,
-               .swp = io_timer_swp,
-       };
 
        if (clock->timers.nr &&
            time_after_eq64(now, clock->timers.data[0]->expire)) {
diff --git a/fs/bcachefs/ec.c b/fs/bcachefs/ec.c
index e410cfe37b1a..c88f10d0606f 100644
--- a/fs/bcachefs/ec.c
+++ b/fs/bcachefs/ec.c
@@ -1057,6 +1057,11 @@ static inline void ec_stripes_heap_swap(void *l, void 
*r, void *h)
        ec_stripes_heap_set_backpointer(_h, j);
 }
 
+static const struct min_heap_callbacks callbacks = {
+       .less = ec_stripes_heap_cmp,
+       .swp = ec_stripes_heap_swap,
+};
+
 static void heap_verify_backpointer(struct bch_fs *c, size_t idx)
 {
        ec_stripes_heap *h = &c->ec_stripes_heap;
@@ -1069,11 +1074,6 @@ static void heap_verify_backpointer(struct bch_fs *c, 
size_t idx)
 void bch2_stripes_heap_del(struct bch_fs *c,
                           struct stripe *m, size_t idx)
 {
-       const struct min_heap_callbacks callbacks = {
-               .less = ec_stripes_heap_cmp,
-               .swp = ec_stripes_heap_swap,
-       };
-
        mutex_lock(&c->ec_stripes_heap_lock);
        heap_verify_backpointer(c, idx);
 
@@ -1084,11 +1084,6 @@ void bch2_stripes_heap_del(struct bch_fs *c,
 void bch2_stripes_heap_insert(struct bch_fs *c,
                              struct stripe *m, size_t idx)
 {
-       const struct min_heap_callbacks callbacks = {
-               .less = ec_stripes_heap_cmp,
-               .swp = ec_stripes_heap_swap,
-       };
-
        mutex_lock(&c->ec_stripes_heap_lock);
        BUG_ON(min_heap_full(&c->ec_stripes_heap));
 
@@ -1107,10 +1102,6 @@ void bch2_stripes_heap_insert(struct bch_fs *c,
 void bch2_stripes_heap_update(struct bch_fs *c,
                              struct stripe *m, size_t idx)
 {
-       const struct min_heap_callbacks callbacks = {
-               .less = ec_stripes_heap_cmp,
-               .swp = ec_stripes_heap_swap,
-       };
        ec_stripes_heap *h = &c->ec_stripes_heap;
        bool do_deletes;
        size_t i;
-- 
2.34.1


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