linux-kernel - [PATCH] mm/slub: remove parameter 'flags' in create_kmalloc

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Date: Tue, 30 Jan 2024 09:41:07 +0800
From: Zheng Yejian <zhengyejian1@...wei.com>
To: <cl@...ux.com>, <penberg@...nel.org>, <rientjes@...gle.com>,
	<iamjoonsoo.kim@....com>, <akpm@...ux-foundation.org>, <vbabka@...e.cz>,
	<roman.gushchin@...ux.dev>, <42.hyeyoo@...il.com>
CC: <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
	<zhengyejian1@...wei.com>
Subject: [PATCH] mm/slub: remove parameter 'flags' in create_kmalloc_caches()

After commit 16a1d968358a ("mm/slab: remove mm/slab.c and slab_def.h"),
parameter 'flags' is only passed as 0 in create_kmalloc_caches(), and
then it is only passed to new_kmalloc_cache().

So we can change parameter 'flags' to be a local variable with
initial value 0 in new_kmalloc_cache() and remove parameter 'flags'
in create_kmalloc_caches(). Also make new_kmalloc_cache() static
due to it is only used in mm/slab_common.c.

Signed-off-by: Zheng Yejian <zhengyejian1@...wei.com>
---
 mm/slab.h        |  4 +---
 mm/slab_common.c | 13 +++++++------
 mm/slub.c        |  2 +-
 3 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/mm/slab.h b/mm/slab.h
index 54deeb0428c6..09c673346ece 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -387,7 +387,7 @@ extern const struct kmalloc_info_struct {
 
 /* Kmalloc array related functions */
 void setup_kmalloc_cache_index_table(void);
-void create_kmalloc_caches(slab_flags_t);
+void create_kmalloc_caches(void);
 
 extern u8 kmalloc_size_index[24];
 
@@ -422,8 +422,6 @@ gfp_t kmalloc_fix_flags(gfp_t flags);
 int __kmem_cache_create(struct kmem_cache *, slab_flags_t flags);
 
 void __init kmem_cache_init(void);
-void __init new_kmalloc_cache(int idx, enum kmalloc_cache_type type,
-			      slab_flags_t flags);
 extern void create_boot_cache(struct kmem_cache *, const char *name,
 			unsigned int size, slab_flags_t flags,
 			unsigned int useroffset, unsigned int usersize);
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 238293b1dbe1..61530df8b35b 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -853,9 +853,10 @@ static unsigned int __kmalloc_minalign(void)
 	return max(minalign, arch_slab_minalign());
 }
 
-void __init
-new_kmalloc_cache(int idx, enum kmalloc_cache_type type, slab_flags_t flags)
+static void __init
+new_kmalloc_cache(int idx, enum kmalloc_cache_type type)
 {
+	slab_flags_t flags = 0;
 	unsigned int minalign = __kmalloc_minalign();
 	unsigned int aligned_size = kmalloc_info[idx].size;
 	int aligned_idx = idx;
@@ -902,7 +903,7 @@ new_kmalloc_cache(int idx, enum kmalloc_cache_type type, slab_flags_t flags)
  * may already have been created because they were needed to
  * enable allocations for slab creation.
  */
-void __init create_kmalloc_caches(slab_flags_t flags)
+void __init create_kmalloc_caches(void)
 {
 	int i;
 	enum kmalloc_cache_type type;
@@ -913,7 +914,7 @@ void __init create_kmalloc_caches(slab_flags_t flags)
 	for (type = KMALLOC_NORMAL; type < NR_KMALLOC_TYPES; type++) {
 		for (i = KMALLOC_SHIFT_LOW; i <= KMALLOC_SHIFT_HIGH; i++) {
 			if (!kmalloc_caches[type][i])
-				new_kmalloc_cache(i, type, flags);
+				new_kmalloc_cache(i, type);
 
 			/*
 			 * Caches that are not of the two-to-the-power-of size.
@@ -922,10 +923,10 @@ void __init create_kmalloc_caches(slab_flags_t flags)
 			 */
 			if (KMALLOC_MIN_SIZE <= 32 && i == 6 &&
 					!kmalloc_caches[type][1])
-				new_kmalloc_cache(1, type, flags);
+				new_kmalloc_cache(1, type);
 			if (KMALLOC_MIN_SIZE <= 64 && i == 7 &&
 					!kmalloc_caches[type][2])
-				new_kmalloc_cache(2, type, flags);
+				new_kmalloc_cache(2, type);
 		}
 	}
 #ifdef CONFIG_RANDOM_KMALLOC_CACHES
diff --git a/mm/slub.c b/mm/slub.c
index 2ef88bbf56a3..4f912f5ec11c 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -5663,7 +5663,7 @@ void __init kmem_cache_init(void)
 
 	/* Now we can use the kmem_cache to allocate kmalloc slabs */
 	setup_kmalloc_cache_index_table();
-	create_kmalloc_caches(0);
+	create_kmalloc_caches();
 
 	/* Setup random freelists for each cache */
 	init_freelist_randomization();
-- 
2.25.1