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lib min_heap: add args for min_heap_callbacks

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Add a third parameter 'args' for the 'less' and 'swp' functions in the
'struct min_heap_callbacks'.  This additional parameter allows these
comparison and swap functions to handle extra arguments when necessary.

Link: https://lkml.kernel.org/r/20240524152958.919343-9-visitorckw@gmail.com
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Brian Foster <bfoster@redhat.com>
Cc: Ching-Chun (Jim) Huang <jserv@ccns.ncku.edu.tw>
Cc: Coly Li <colyli@suse.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthew Sakai <msakai@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kuan-Wei Chiu 2024-05-24 23:29:50 +08:00 committed by Andrew Morton
parent b9d720e65a
commit 267607e875
5 changed files with 54 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/md/dm-vdo/repair.c
View File

@ -137,7 +137,7 @@ struct repair_completion {
* to sort by slot while still ensuring we replay all entries with the same slot in the exact order
* as they appeared in the journal.
*/
static bool mapping_is_less_than(const void *item1, const void *item2)
static bool mapping_is_less_than(const void *item1, const void *item2, void __always_unused *args)
{
const struct numbered_block_mapping *mapping1 =
(const struct numbered_block_mapping *) item1;
@ -156,7 +156,7 @@ static bool mapping_is_less_than(const void *item1, const void *item2)
return 0;
}
static void swap_mappings(void *item1, void *item2)
static void swap_mappings(void *item1, void *item2, void __always_unused *args)
{
struct numbered_block_mapping *mapping1 = item1;
struct numbered_block_mapping *mapping2 = item2;
@ -182,8 +182,8 @@ static struct numbered_block_mapping *sort_next_heap_element(struct repair_compl
* restore the heap invariant, and return a pointer to the popped element.
*/
last = &repair->entries[--heap->nr];
swap_mappings(heap->data, last);
min_heapify(heap, 0, &repair_min_heap);
swap_mappings(heap->data, last, NULL);
min_heapify(heap, 0, &repair_min_heap, NULL);
return last;
}
@ -1123,7 +1123,7 @@ static void recover_block_map(struct vdo_completion *completion)
.nr = repair->block_map_entry_count,
.size = repair->block_map_entry_count,
};
min_heapify_all(&repair->replay_heap, &repair_min_heap);
min_heapify_all(&repair->replay_heap, &repair_min_heap, NULL);
vdo_log_info("Replaying %zu recovery entries into block map",
repair->block_map_entry_count);

9
drivers/md/dm-vdo/slab-depot.c
View File

@ -3288,7 +3288,8 @@ int vdo_release_block_reference(struct block_allocator *allocator,
* Thus, the ordering is reversed from the usual sense since min_heap returns smaller elements
* before larger ones.
*/
static bool slab_status_is_less_than(const void *item1, const void *item2)
static bool slab_status_is_less_than(const void *item1, const void *item2,
void __always_unused *args)
{
const struct slab_status *info1 = item1;
const struct slab_status *info2 = item2;
@ -3300,7 +3301,7 @@ static bool slab_status_is_less_than(const void *item1, const void *item2)
return info1->slab_number < info2->slab_number;
}
static void swap_slab_statuses(void *item1, void *item2)
static void swap_slab_statuses(void *item1, void *item2, void __always_unused *args)
{
struct slab_status *info1 = item1;
struct slab_status *info2 = item2;
@ -3525,7 +3526,7 @@ static int __must_check vdo_prepare_slabs_for_allocation(struct block_allocator
.nr = allocator->slab_count,
.size = allocator->slab_count,
};
min_heapify_all(&heap, &slab_status_min_heap);
min_heapify_all(&heap, &slab_status_min_heap, NULL);
while (heap.nr > 0) {
bool high_priority;
@ -3533,7 +3534,7 @@ static int __must_check vdo_prepare_slabs_for_allocation(struct block_allocator
struct slab_journal *journal;
current_slab_status = slab_statuses[0];
min_heap_pop(&heap, &slab_status_min_heap);
min_heap_pop(&heap, &slab_status_min_heap, NULL);
slab = depot->slabs[current_slab_status.slab_number];
if ((depot->load_type == VDO_SLAB_DEPOT_REBUILD_LOAD) ||

51
include/linux/min_heap.h
View File

@ -34,8 +34,8 @@ typedef DEFINE_MIN_HEAP(char, min_heap_char) min_heap_char;
* @swp: Swap elements function.
*/
struct min_heap_callbacks {
bool (*less)(const void *lhs, const void *rhs);
void (*swp)(void *lhs, void *rhs);
bool (*less)(const void *lhs, const void *rhs, void *args);
void (*swp)(void *lhs, void *rhs, void *args);
};
/* Initialize a min-heap. */
@ -76,7 +76,7 @@ bool __min_heap_full(min_heap_char *heap)
/* Sift the element at pos down the heap. */
static __always_inline
void __min_heapify(min_heap_char *heap, int pos, size_t elem_size,
const struct min_heap_callbacks *func)
const struct min_heap_callbacks *func, void *args)
{
void *left, *right;
void *data = heap->data;
@ -89,7 +89,7 @@ void __min_heapify(min_heap_char *heap, int pos, size_t elem_size,
break;
left = data + (i * 2 + 1) * elem_size;
right = data + (i * 2 + 2) * elem_size;
i = func->less(left, right) ? i * 2 + 1 : i * 2 + 2;
i = func->less(left, right, args) ? i * 2 + 1 : i * 2 + 2;
}
/* Special case for the last leaf with no sibling. */
@ -97,38 +97,38 @@ void __min_heapify(min_heap_char *heap, int pos, size_t elem_size,
i = i * 2 + 1;
/* Backtrack to the correct location. */
while (i != pos && func->less(root, data + i * elem_size))
while (i != pos && func->less(root, data + i * elem_size, args))
i = (i - 1) / 2;
/* Shift the element into its correct place. */
j = i;
while (i != pos) {
i = (i - 1) / 2;
func->swp(data + i * elem_size, data + j * elem_size);
func->swp(data + i * elem_size, data + j * elem_size, args);
}
}
#define min_heapify(_heap, _pos, _func) \
__min_heapify((min_heap_char *)_heap, _pos, __minheap_obj_size(_heap), _func)
#define min_heapify(_heap, _pos, _func, _args) \
__min_heapify((min_heap_char *)_heap, _pos, __minheap_obj_size(_heap), _func, _args)
/* Floyd's approach to heapification that is O(nr). */
static __always_inline
void __min_heapify_all(min_heap_char *heap, size_t elem_size,
const struct min_heap_callbacks *func)
const struct min_heap_callbacks *func, void *args)
{
int i;
for (i = heap->nr / 2 - 1; i >= 0; i--)
__min_heapify(heap, i, elem_size, func);
__min_heapify(heap, i, elem_size, func, args);
}
#define min_heapify_all(_heap, _func) \
__min_heapify_all((min_heap_char *)_heap, __minheap_obj_size(_heap), _func)
#define min_heapify_all(_heap, _func, _args) \
__min_heapify_all((min_heap_char *)_heap, __minheap_obj_size(_heap), _func, _args)
/* Remove minimum element from the heap, O(log2(nr)). */
static __always_inline
void __min_heap_pop(min_heap_char *heap, size_t elem_size,
const struct min_heap_callbacks *func)
const struct min_heap_callbacks *func, void *args)
{
void *data = heap->data;
@ -138,11 +138,11 @@ void __min_heap_pop(min_heap_char *heap, size_t elem_size,
/* Place last element at the root (position 0) and then sift down. */
heap->nr--;
memcpy(data, data + (heap->nr * elem_size), elem_size);
__min_heapify(heap, 0, elem_size, func);
__min_heapify(heap, 0, elem_size, func, args);
}
#define min_heap_pop(_heap, _func) \
__min_heap_pop((min_heap_char *)_heap, __minheap_obj_size(_heap), _func)
#define min_heap_pop(_heap, _func, _args) \
__min_heap_pop((min_heap_char *)_heap, __minheap_obj_size(_heap), _func, _args)
/*
* Remove the minimum element and then push the given element. The
@ -152,19 +152,20 @@ void __min_heap_pop(min_heap_char *heap, size_t elem_size,
static __always_inline
void __min_heap_pop_push(min_heap_char *heap,
const void *element, size_t elem_size,
const struct min_heap_callbacks *func)
const struct min_heap_callbacks *func,
void *args)
{
memcpy(heap->data, element, elem_size);
__min_heapify(heap, 0, elem_size, func);
__min_heapify(heap, 0, elem_size, func, args);
}
#define min_heap_pop_push(_heap, _element, _func) \
__min_heap_pop_push((min_heap_char *)_heap, _element, __minheap_obj_size(_heap), _func)
#define min_heap_pop_push(_heap, _element, _func, _args) \
__min_heap_pop_push((min_heap_char *)_heap, _element, __minheap_obj_size(_heap), _func, _args)
/* Push an element on to the heap, O(log2(nr)). */
static __always_inline
void __min_heap_push(min_heap_char *heap, const void *element, size_t elem_size,
const struct min_heap_callbacks *func)
const struct min_heap_callbacks *func, void *args)
{
void *data = heap->data;
void *child, *parent;
@ -182,13 +183,13 @@ void __min_heap_push(min_heap_char *heap, const void *element, size_t elem_size,
for (; pos > 0; pos = (pos - 1) / 2) {
child = data + (pos * elem_size);
parent = data + ((pos - 1) / 2) * elem_size;
if (func->less(parent, child))
if (func->less(parent, child, args))
break;
func->swp(parent, child);
func->swp(parent, child, args);
}
}
#define min_heap_push(_heap, _element, _func) \
__min_heap_push((min_heap_char *)_heap, _element, __minheap_obj_size(_heap), _func)
#define min_heap_push(_heap, _element, _func, _args) \
__min_heap_push((min_heap_char *)_heap, _element, __minheap_obj_size(_heap), _func, _args)
#endif /* _LINUX_MIN_HEAP_H */

10
kernel/events/core.c
View File

@ -3686,7 +3686,7 @@ void __perf_event_task_sched_out(struct task_struct *task,
perf_cgroup_switch(next);
}
static bool perf_less_group_idx(const void *l, const void *r)
static bool perf_less_group_idx(const void *l, const void *r, void __always_unused *args)
{
const struct perf_event *le = *(const struct perf_event **)l;
const struct perf_event *re = *(const struct perf_event **)r;
@ -3694,7 +3694,7 @@ static bool perf_less_group_idx(const void *l, const void *r)
return le->group_index < re->group_index;
}
static void swap_ptr(void *l, void *r)
static void swap_ptr(void *l, void *r, void __always_unused *args)
{
void **lp = l, **rp = r;
@ -3786,7 +3786,7 @@ static noinline int visit_groups_merge(struct perf_event_context *ctx,
perf_assert_pmu_disabled((*evt)->pmu_ctx->pmu);
}
min_heapify_all(&event_heap, &perf_min_heap);
min_heapify_all(&event_heap, &perf_min_heap, NULL);
while (event_heap.nr) {
ret = func(*evt, data);
@ -3795,9 +3795,9 @@ static noinline int visit_groups_merge(struct perf_event_context *ctx,
*evt = perf_event_groups_next(*evt, pmu);
if (*evt)
min_heapify(&event_heap, 0, &perf_min_heap);
min_heapify(&event_heap, 0, &perf_min_heap, NULL);
else
min_heap_pop(&event_heap, &perf_min_heap);
min_heap_pop(&event_heap, &perf_min_heap, NULL);
}
return 0;

26
lib/test_min_heap.c
View File

@ -13,17 +13,17 @@
DEFINE_MIN_HEAP(int, min_heap_test);
static __init bool less_than(const void *lhs, const void *rhs)
static __init bool less_than(const void *lhs, const void *rhs, void __always_unused *args)
{
return *(int *)lhs < *(int *)rhs;
}
static __init bool greater_than(const void *lhs, const void *rhs)
static __init bool greater_than(const void *lhs, const void *rhs, void __always_unused *args)
{
return *(int *)lhs > *(int *)rhs;
}
static __init void swap_ints(void *lhs, void *rhs)
static __init void swap_ints(void *lhs, void *rhs, void __always_unused *args)
{
int temp = *(int *)lhs;
@ -40,7 +40,7 @@ static __init int pop_verify_heap(bool min_heap,
int last;
last = values[0];
min_heap_pop(heap, funcs);
min_heap_pop(heap, funcs, NULL);
while (heap->nr > 0) {
if (min_heap) {
if (last > values[0]) {
@ -56,7 +56,7 @@ static __init int pop_verify_heap(bool min_heap,
}
}
last = values[0];
min_heap_pop(heap, funcs);
min_heap_pop(heap, funcs, NULL);
}
return err;
}
@ -77,7 +77,7 @@ static __init int test_heapify_all(bool min_heap)
int i, err;
/* Test with known set of values. */
min_heapify_all(&heap, &funcs);
min_heapify_all(&heap, &funcs, NULL);
err = pop_verify_heap(min_heap, &heap, &funcs);
@ -86,7 +86,7 @@ static __init int test_heapify_all(bool min_heap)
for (i = 0; i < heap.nr; i++)
values[i] = get_random_u32();
min_heapify_all(&heap, &funcs);
min_heapify_all(&heap, &funcs, NULL);
err += pop_verify_heap(min_heap, &heap, &funcs);
return err;
@ -110,14 +110,14 @@ static __init int test_heap_push(bool min_heap)
/* Test with known set of values copied from data. */
for (i = 0; i < ARRAY_SIZE(data); i++)
min_heap_push(&heap, &data[i], &funcs);
min_heap_push(&heap, &data[i], &funcs, NULL);
err = pop_verify_heap(min_heap, &heap, &funcs);
/* Test with randomly generated values. */
while (heap.nr < heap.size) {
temp = get_random_u32();
min_heap_push(&heap, &temp, &funcs);
min_heap_push(&heap, &temp, &funcs, NULL);
}
err += pop_verify_heap(min_heap, &heap, &funcs);
@ -143,22 +143,22 @@ static __init int test_heap_pop_push(bool min_heap)
/* Fill values with data to pop and replace. */
temp = min_heap ? 0x80000000 : 0x7FFFFFFF;
for (i = 0; i < ARRAY_SIZE(data); i++)
min_heap_push(&heap, &temp, &funcs);
min_heap_push(&heap, &temp, &funcs, NULL);
/* Test with known set of values copied from data. */
for (i = 0; i < ARRAY_SIZE(data); i++)
min_heap_pop_push(&heap, &data[i], &funcs);
min_heap_pop_push(&heap, &data[i], &funcs, NULL);
err = pop_verify_heap(min_heap, &heap, &funcs);
heap.nr = 0;
for (i = 0; i < ARRAY_SIZE(data); i++)
min_heap_push(&heap, &temp, &funcs);
min_heap_push(&heap, &temp, &funcs, NULL);
/* Test with randomly generated values. */
for (i = 0; i < ARRAY_SIZE(data); i++) {
temp = get_random_u32();
min_heap_pop_push(&heap, &temp, &funcs);
min_heap_pop_push(&heap, &temp, &funcs, NULL);
}
err += pop_verify_heap(min_heap, &heap, &funcs);