[PATCH v2 07/10] bcache: Update min_heap_callbacks to use default builtin swap

Kuan-Wei Chiu
2024-10-20T04:02:57Z

Replace the swp function pointer in the min_heap_callbacks of bcache
with NULL, allowing direct usage of the default builtin swap
implementation. This modification simplifies the code and improves
performance by removing unnecessary function indirection.

Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
---
drivers/md/bcache/alloc.c | 11 ++---------
drivers/md/bcache/bset.c | 14 +++-----------
drivers/md/bcache/extents.c | 10 +---------
drivers/md/bcache/movinggc.c | 10 +---------
4 files changed, 7 insertions(+), 38 deletions(-)

diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c
index da50f6661bae..8998e61efa40 100644
--- a/drivers/md/bcache/alloc.c
+++ b/drivers/md/bcache/alloc.c
@@ -189,23 +189,16 @@ static inline bool new_bucket_min_cmp(const void *l, const void *r, void *args)
return new_bucket_prio(ca, *lhs) < new_bucket_prio(ca, *rhs);
}

-static inline void new_bucket_swap(void *l, void *r, void __always_unused *args)
-{
- struct bucket **lhs = l, **rhs = r;
-
- swap(*lhs, *rhs);
-}
-
static void invalidate_buckets_lru(struct cache *ca)
{
struct bucket *b;
const struct min_heap_callbacks bucket_max_cmp_callback = {
.less = new_bucket_max_cmp,
- .swp = new_bucket_swap,
+ .swp = NULL,
};
const struct min_heap_callbacks bucket_min_cmp_callback = {
.less = new_bucket_min_cmp,
- .swp = new_bucket_swap,
+ .swp = NULL,
};

ca->heap.nr = 0;
diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c
index bd97d8626887..68258a16e125 100644
--- a/drivers/md/bcache/bset.c
+++ b/drivers/md/bcache/bset.c
@@ -1093,14 +1093,6 @@ static inline bool new_btree_iter_cmp(const void *l, const void *r, void __alway
return bkey_cmp(_l->k, _r->k) <= 0;
}

-static inline void new_btree_iter_swap(void *iter1, void *iter2, void __always_unused *args)
-{
- struct btree_iter_set *_iter1 = iter1;
- struct btree_iter_set *_iter2 = iter2;
-
- swap(*_iter1, *_iter2);
-}
-
static inline bool btree_iter_end(struct btree_iter *iter)
{
return !iter->heap.nr;
@@ -1111,7 +1103,7 @@ void bch_btree_iter_push(struct btree_iter *iter, struct bkey *k,
{
const struct min_heap_callbacks callbacks = {
.less = new_btree_iter_cmp,
- .swp = new_btree_iter_swap,
+ .swp = NULL,
};

if (k != end)
@@ -1157,7 +1149,7 @@ static inline struct bkey *__bch_btree_iter_next(struct btree_iter *iter,
struct bkey *ret = NULL;
const struct min_heap_callbacks callbacks = {
.less = cmp,
- .swp = new_btree_iter_swap,
+ .swp = NULL,
};

if (!btree_iter_end(iter)) {
@@ -1231,7 +1223,7 @@ static void btree_mergesort(struct btree_keys *b, struct bset *out,
: bch_ptr_invalid;
const struct min_heap_callbacks callbacks = {
.less = b->ops->sort_cmp,
- .swp = new_btree_iter_swap,
+ .swp = NULL,
};

/* Heapify the iterator, using our comparison function */
diff --git a/drivers/md/bcache/extents.c b/drivers/md/bcache/extents.c
index a7221e5dbe81..4b84fda1530a 100644
--- a/drivers/md/bcache/extents.c
+++ b/drivers/md/bcache/extents.c
@@ -266,20 +266,12 @@ static bool new_bch_extent_sort_cmp(const void *l, const void *r, void __always_
return !(c ? c > 0 : _l->k < _r->k);
}

-static inline void new_btree_iter_swap(void *iter1, void *iter2, void __always_unused *args)
-{
- struct btree_iter_set *_iter1 = iter1;
- struct btree_iter_set *_iter2 = iter2;
-
- swap(*_iter1, *_iter2);
-}
-
static struct bkey *bch_extent_sort_fixup(struct btree_iter *iter,
struct bkey *tmp)
{
const struct min_heap_callbacks callbacks = {
.less = new_bch_extent_sort_cmp,
- .swp = new_btree_iter_swap,
+ .swp = NULL,
};
while (iter->heap.nr > 1) {
struct btree_iter_set *top = iter->heap.data, *i = top + 1;
diff --git a/drivers/md/bcache/movinggc.c b/drivers/md/bcache/movinggc.c
index 7f482729c56d..ef6abf33f926 100644
--- a/drivers/md/bcache/movinggc.c
+++ b/drivers/md/bcache/movinggc.c
@@ -190,14 +190,6 @@ static bool new_bucket_cmp(const void *l, const void *r, void __always_unused *a
return GC_SECTORS_USED(*_l) >= GC_SECTORS_USED(*_r);
}

-static void new_bucket_swap(void *l, void *r, void __always_unused *args)
-{
- struct bucket **_l = l;
- struct bucket **_r = r;
-
- swap(*_l, *_r);
-}
-
static unsigned int bucket_heap_top(struct cache *ca)
{
struct bucket *b;
@@ -212,7 +204,7 @@ void bch_moving_gc(struct cache_set *c)
unsigned long sectors_to_move, reserve_sectors;
const struct min_heap_callbacks callbacks = {
.less = new_bucket_cmp,
- .swp = new_bucket_swap,
+ .swp = NULL,
};

if (!c->copy_gc_enabled)
--
2.34.1