+ lib-min_heap-use-size_t-for-array-size-and-index-variables.patch added to mm-nonmm-unstable branch

+ lib-min_heap-use-size_t-for-array-size-and-index-variables.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: lib min_heap: use size_t for array size and index variables
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     lib-min_heap-use-size_t-for-array-size-and-index-variables.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-min_heap-use-size_t-for-array-size-and-index-variables.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Kuan-Wei Chiu <visitorckw@gmail.com>
Subject: lib min_heap: use size_t for array size and index variables
Date: Sun, 16 Feb 2025 00:56:18 +0800

Replace the int type with size_t for variables representing array sizes
and indices in the min-heap implementation.  Using size_t aligns with
standard practices for size-related variables and avoids potential issues
on platforms where int may be insufficient to represent all valid sizes or
indices.

Link: https://lkml.kernel.org/r/20250215165618.1757219-1-visitorckw@gmail.com
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Cc: Ching-Chun (Jim) Huang <jserv@ccns.ncku.edu.tw>
Cc: Yu-Chun Lin <eleanor15x@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/min_heap.h |   12 ++++++------
 lib/min_heap.c           |    4 ++--
 2 files changed, 8 insertions(+), 8 deletions(-)

--- a/include/linux/min_heap.h~lib-min_heap-use-size_t-for-array-size-and-index-variables
+++ a/include/linux/min_heap.h
@@ -218,7 +218,7 @@ static size_t parent(size_t i, unsigned
 
 /* Initialize a min-heap. */
 static __always_inline
-void __min_heap_init_inline(min_heap_char *heap, void *data, int size)
+void __min_heap_init_inline(min_heap_char *heap, void *data, size_t size)
 {
 	heap->nr = 0;
 	heap->size = size;
@@ -254,7 +254,7 @@ bool __min_heap_full_inline(min_heap_cha
 
 /* Sift the element at pos down the heap. */
 static __always_inline
-void __min_heap_sift_down_inline(min_heap_char *heap, int pos, size_t elem_size,
+void __min_heap_sift_down_inline(min_heap_char *heap, size_t pos, size_t elem_size,
 				 const struct min_heap_callbacks *func, void *args)
 {
 	const unsigned long lsbit = elem_size & -elem_size;
@@ -324,7 +324,7 @@ static __always_inline
 void __min_heapify_all_inline(min_heap_char *heap, size_t elem_size,
 			      const struct min_heap_callbacks *func, void *args)
 {
-	int i;
+	ssize_t i;
 
 	for (i = heap->nr / 2 - 1; i >= 0; i--)
 		__min_heap_sift_down_inline(heap, i, elem_size, func, args);
@@ -379,7 +379,7 @@ bool __min_heap_push_inline(min_heap_cha
 			    const struct min_heap_callbacks *func, void *args)
 {
 	void *data = heap->data;
-	int pos;
+	size_t pos;
 
 	if (WARN_ONCE(heap->nr >= heap->size, "Pushing on a full heap"))
 		return false;
@@ -428,10 +428,10 @@ bool __min_heap_del_inline(min_heap_char
 	__min_heap_del_inline(container_of(&(_heap)->nr, min_heap_char, nr),	\
 			      __minheap_obj_size(_heap), _idx, _func, _args)
 
-void __min_heap_init(min_heap_char *heap, void *data, int size);
+void __min_heap_init(min_heap_char *heap, void *data, size_t size);
 void *__min_heap_peek(struct min_heap_char *heap);
 bool __min_heap_full(min_heap_char *heap);
-void __min_heap_sift_down(min_heap_char *heap, int pos, size_t elem_size,
+void __min_heap_sift_down(min_heap_char *heap, size_t pos, size_t elem_size,
 			  const struct min_heap_callbacks *func, void *args);
 void __min_heap_sift_up(min_heap_char *heap, size_t elem_size, size_t idx,
 			const struct min_heap_callbacks *func, void *args);
--- a/lib/min_heap.c~lib-min_heap-use-size_t-for-array-size-and-index-variables
+++ a/lib/min_heap.c
@@ -2,7 +2,7 @@
 #include <linux/export.h>
 #include <linux/min_heap.h>
 
-void __min_heap_init(min_heap_char *heap, void *data, int size)
+void __min_heap_init(min_heap_char *heap, void *data, size_t size)
 {
 	__min_heap_init_inline(heap, data, size);
 }
@@ -20,7 +20,7 @@ bool __min_heap_full(min_heap_char *heap
 }
 EXPORT_SYMBOL(__min_heap_full);
 
-void __min_heap_sift_down(min_heap_char *heap, int pos, size_t elem_size,
+void __min_heap_sift_down(min_heap_char *heap, size_t pos, size_t elem_size,
 			  const struct min_heap_callbacks *func, void *args)
 {
 	__min_heap_sift_down_inline(heap, pos, elem_size, func, args);
_

Patches currently in -mm which might be from visitorckw@gmail.com are

lib-min_heap-use-size_t-for-array-size-and-index-variables.patch