From: Kuan-Wei Chiu <visitorckw@gmail.com>
Date: Fri, 24 May 2024 15:29:49 +0000 (+0800)
Subject: lib min_heap: add min_heap_full()
X-Git-Tag: v6.11-rc1~84^2~86
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b9d720e65a72c9754faf689e0859a5632853f4bc;p=thirdparty%2Fkernel%2Flinux.git

lib min_heap: add min_heap_full()

Add min_heap_full() which returns a boolean value indicating whether the
heap has reached its maximum capacity.

Link: https://lkml.kernel.org/r/20240524152958.919343-8-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>
---

diff --git a/include/linux/min_heap.h b/include/linux/min_heap.h
index d9c4ae7ad0cc9..f41898c05f5ad 100644
--- a/include/linux/min_heap.h
+++ b/include/linux/min_heap.h
@@ -63,6 +63,16 @@ void *__min_heap_peek(struct min_heap_char *heap)
 #define min_heap_peek(_heap)	\
 	(__minheap_cast(_heap) __min_heap_peek((min_heap_char *)_heap))
 
+/* Check if the heap is full. */
+static __always_inline
+bool __min_heap_full(min_heap_char *heap)
+{
+	return heap->nr == heap->size;
+}
+
+#define min_heap_full(_heap)	\
+	__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,