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From: Pengfei Li <lpf.vector@gmail.com>
To: akpm@linux-foundation.org
Cc: vbabka@suse.cz, cl@linux.com, penberg@kernel.org,
	rientjes@google.com, iamjoonsoo.kim@lge.com, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, guro@fb.com,
	Pengfei Li <lpf.vector@gmail.com>
Subject: [PATCH v3 2/4] mm, slab: Remove unused kmalloc_size()
Date: Tue, 10 Sep 2019 09:26:50 +0800	[thread overview]
Message-ID: <20190910012652.3723-3-lpf.vector@gmail.com> (raw)
In-Reply-To: <20190910012652.3723-1-lpf.vector@gmail.com>

The size of kmalloc can be obtained from kmalloc_info[],
so remove kmalloc_size() that will not be used anymore.

Signed-off-by: Pengfei Li <lpf.vector@gmail.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Roman Gushchin <guro@fb.com>
---
 include/linux/slab.h | 20 --------------------
 mm/slab.c            |  5 +++--
 mm/slab_common.c     |  5 ++---
 3 files changed, 5 insertions(+), 25 deletions(-)

diff --git a/include/linux/slab.h b/include/linux/slab.h
index 56c9c7eed34e..e773e5764b7b 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -557,26 +557,6 @@ static __always_inline void *kmalloc(size_t size, gfp_t flags)
 	return __kmalloc(size, flags);
 }
 
-/*
- * Determine size used for the nth kmalloc cache.
- * return size or 0 if a kmalloc cache for that
- * size does not exist
- */
-static __always_inline unsigned int kmalloc_size(unsigned int n)
-{
-#ifndef CONFIG_SLOB
-	if (n > 2)
-		return 1U << n;
-
-	if (n == 1 && KMALLOC_MIN_SIZE <= 32)
-		return 96;
-
-	if (n == 2 && KMALLOC_MIN_SIZE <= 64)
-		return 192;
-#endif
-	return 0;
-}
-
 static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
 {
 #ifndef CONFIG_SLOB
diff --git a/mm/slab.c b/mm/slab.c
index c42b6211f42e..7bc4e90e1147 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1248,8 +1248,9 @@ void __init kmem_cache_init(void)
 	 */
 	kmalloc_caches[KMALLOC_NORMAL][INDEX_NODE] = create_kmalloc_cache(
 				kmalloc_info[INDEX_NODE].name[KMALLOC_NORMAL],
-				kmalloc_size(INDEX_NODE), ARCH_KMALLOC_FLAGS,
-				0, kmalloc_size(INDEX_NODE));
+				kmalloc_info[INDEX_NODE].size,
+				ARCH_KMALLOC_FLAGS, 0,
+				kmalloc_info[INDEX_NODE].size);
 	slab_state = PARTIAL_NODE;
 	setup_kmalloc_cache_index_table();
 
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 002e16673581..8b542cfcc4f2 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -1239,11 +1239,10 @@ void __init create_kmalloc_caches(slab_flags_t flags)
 		struct kmem_cache *s = kmalloc_caches[KMALLOC_NORMAL][i];
 
 		if (s) {
-			unsigned int size = kmalloc_size(i);
-
 			kmalloc_caches[KMALLOC_DMA][i] = create_kmalloc_cache(
 				kmalloc_info[i].name[KMALLOC_DMA],
-				size, SLAB_CACHE_DMA | flags, 0, 0);
+				kmalloc_info[i].size,
+				SLAB_CACHE_DMA | flags, 0, 0);
 		}
 	}
 #endif
-- 
2.21.0


  parent reply	other threads:[~2019-09-10  1:27 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-10  1:26 [PATCH v3 0/4] mm, slab: Make kmalloc_info[] contain all types of names Pengfei Li
2019-09-10  1:26 ` [PATCH v3 1/4] " Pengfei Li
2019-09-10  1:26 ` Pengfei Li [this message]
2019-09-10  1:26 ` [PATCH v3 3/4] mm, slab_common: use enum kmalloc_cache_type to iterate over kmalloc caches Pengfei Li
2019-09-10  1:26 ` [PATCH v3 4/4] mm, slab_common: Make the loop for initializing KMALLOC_DMA start from 1 Pengfei Li
2019-09-10 10:26   ` Vlastimil Babka
2019-09-11 14:33     ` Pengfei Li
2019-09-11 14:33       ` Pengfei Li
2019-09-12  9:32       ` Vlastimil Babka

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