linux-kernel - [PATCH 05/13] lib min_heap: Add min_heap

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Message-Id: <20240319180005.246930-6-visitorckw@gmail.com>
Date: Wed, 20 Mar 2024 01:59:57 +0800
From: Kuan-Wei Chiu <visitorckw@...il.com>
To: colyli@...e.de,
	kent.overstreet@...ux.dev,
	msakai@...hat.com,
	peterz@...radead.org,
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Cc: bfoster@...hat.com,
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	Kuan-Wei Chiu <visitorckw@...il.com>
Subject: [PATCH 05/13] lib min_heap: Add min_heap_init()

Add min_heap_init() for initializing heap with data, nr, and size.

Signed-off-by: Kuan-Wei Chiu <visitorckw@...il.com>
---
 include/linux/min_heap.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/min_heap.h b/include/linux/min_heap.h
index c3635a7fdb88..ed462f194b88 100644
--- a/include/linux/min_heap.h
+++ b/include/linux/min_heap.h
@@ -44,6 +44,18 @@ struct min_heap_callbacks {
 	void (*swp)(void *lhs, void *rhs);
 };
 
+/* Initialize a min-heap. */
+static __always_inline
+void __min_heap_init(struct __min_heap *heap, void *data, int size)
+{
+	heap->data = data;
+	heap->nr = 0;
+	heap->size = size;
+}
+
+#define min_heap_init(_heap, _data, _size)	\
+	__min_heap_init(&(_heap)->heap, _data, _size)
+
 /* Sift the element at pos down the heap. */
 static __always_inline
 void __min_heapify(struct __min_heap *heap, int pos, size_t elem_size,
-- 
2.34.1