linux-kernel - Re: [PATCH v2 12/15] lib min_heap: Rename min_heapify() to min_heap_sift

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Message-ID: <CAP-5=fVYisZxfL-2E6s+XLdsYwmpdAtn7BffPtQEAYjfCnjrSg@mail.gmail.com>
Date: Wed, 20 Mar 2024 10:17:50 -0700
From: Ian Rogers <irogers@...gle.com>
To: Kuan-Wei Chiu <visitorckw@...il.com>
Cc: colyli@...e.de, kent.overstreet@...ux.dev, msakai@...hat.com, 
	peterz@...radead.org, mingo@...hat.com, acme@...nel.org, namhyung@...nel.org, 
	akpm@...ux-foundation.org, bfoster@...hat.com, mark.rutland@....com, 
	alexander.shishkin@...ux.intel.com, jolsa@...nel.org, adrian.hunter@...el.com, 
	jserv@...s.ncku.edu.tw, dm-devel@...ts.linux.dev, 
	linux-bcache@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-bcachefs@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v2 12/15] lib min_heap: Rename min_heapify() to min_heap_sift_down()

On Wed, Mar 20, 2024 at 7:55 AM Kuan-Wei Chiu <visitorckw@...il.com> wrote:
>
> After adding min_heap_sift_up(), the naming convention has been
> adjusted to maintain consistency with the min_heap_sift_up().
> Consequently, min_heapify() has been renamed to min_heap_sift_down().
>
> Link: https://lkml.kernel.org/CAP-5=fVcBAxt8Mw72=NCJPRJfjDaJcqk4rjbadgouAEAHz_q1A@mail.gmail.com
> Signed-off-by: Kuan-Wei Chiu <visitorckw@...il.com>

Reviewed-by: Ian Rogers <irogers@...gle.com>

Thanks,
Ian

> ---
>  drivers/md/dm-vdo/repair.c |  2 +-
>  include/linux/min_heap.h   | 14 +++++++-------
>  kernel/events/core.c       |  2 +-
>  3 files changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/md/dm-vdo/repair.c b/drivers/md/dm-vdo/repair.c
> index 6acaebcd305d..e99f908bbdb9 100644
> --- a/drivers/md/dm-vdo/repair.c
> +++ b/drivers/md/dm-vdo/repair.c
> @@ -183,7 +183,7 @@ static struct numbered_block_mapping *sort_next_heap_element(struct repair_compl
>          */
>         last = &repair->entries[--heap->heap.nr];
>         swap_mappings(heap->heap.data, last, NULL);
> -       min_heapify(heap, 0, &repair_min_heap, NULL);
> +       min_heap_sift_down(heap, 0, &repair_min_heap, NULL);
>         return last;
>  }
>
> diff --git a/include/linux/min_heap.h b/include/linux/min_heap.h
> index 586965977104..436997070f4e 100644
> --- a/include/linux/min_heap.h
> +++ b/include/linux/min_heap.h
> @@ -78,7 +78,7 @@ bool __min_heap_full(struct __min_heap *heap)
>
>  /* Sift the element at pos down the heap. */
>  static __always_inline
> -void __min_heapify(struct __min_heap *heap, int pos, size_t elem_size,
> +void __min_heap_sift_down(struct __min_heap *heap, int pos, size_t elem_size,
>                 const struct min_heap_callbacks *func, void *args)
>  {
>         void *left, *right;
> @@ -111,8 +111,8 @@ void __min_heapify(struct __min_heap *heap, int pos, size_t elem_size,
>         }
>  }
>
> -#define min_heapify(_heap, _pos, _func, _args) \
> -       __min_heapify(&(_heap)->heap, _pos, __minheap_obj_size(_heap), _func, _args)
> +#define min_heap_sift_down(_heap, _pos, _func, _args)  \
> +       __min_heap_sift_down(&(_heap)->heap, _pos, __minheap_obj_size(_heap), _func, _args)
>
>  /* Floyd's approach to heapification that is O(nr). */
>  static __always_inline
> @@ -122,7 +122,7 @@ void __min_heapify_all(struct __min_heap *heap, size_t elem_size,
>         int i;
>
>         for (i = heap->nr / 2 - 1; i >= 0; i--)
> -               __min_heapify(heap, i, elem_size, func, args);
> +               __min_heap_sift_down(heap, i, elem_size, func, args);
>  }
>
>  #define min_heapify_all(_heap, _func, _args)   \
> @@ -141,7 +141,7 @@ bool __min_heap_pop(struct __min_heap *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, args);
> +       __min_heap_sift_down(heap, 0, elem_size, func, args);
>
>         return true;
>  }
> @@ -161,7 +161,7 @@ void __min_heap_pop_push(struct __min_heap *heap,
>                 void *args)
>  {
>         memcpy(heap->data, element, elem_size);
> -       __min_heapify(heap, 0, elem_size, func, args);
> +       __min_heap_sift_down(heap, 0, elem_size, func, args);
>  }
>
>  #define min_heap_pop_push(_heap, _element, _func, _args)       \
> @@ -235,7 +235,7 @@ bool __min_heap_del(struct __min_heap *heap, size_t elem_size, size_t idx,
>                 return true;
>         memcpy(data, data + (heap->nr * elem_size), elem_size);
>         __min_heap_sift_up(heap, elem_size, idx, func, args);
> -       __min_heapify(heap, idx, elem_size, func, args);
> +       __min_heap_sift_down(heap, idx, elem_size, func, args);
>
>         return true;
>  }
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index c32a78c489f3..314fb7ea4ec3 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -3788,7 +3788,7 @@ 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, NULL);
> +                       min_heap_sift_down(&event_heap, 0, &perf_min_heap, NULL);
>                 else
>                         min_heap_pop(&event_heap, &perf_min_heap, NULL);
>         }
> --
> 2.34.1
>