linux-kernel - [PATCH] mm: kill is_memblock

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Message-ID: <20220827112043.187028-1-wangkefeng.wang@huawei.com>
Date:   Sat, 27 Aug 2022 19:20:43 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH] mm: kill is_memblock_offlined()

Directly check state of struct memory_block, no need a single function.

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 drivers/base/memory.c          | 6 ------
 include/linux/memory_hotplug.h | 2 --
 mm/memory_hotplug.c            | 3 +--
 3 files changed, 1 insertion(+), 10 deletions(-)

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index bc60c9cd3230..9aa0da991cfb 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -869,12 +869,6 @@ void remove_memory_block_devices(unsigned long start, unsigned long size)
 	}
 }
 
-/* return true if the memory block is offlined, otherwise, return false */
-bool is_memblock_offlined(struct memory_block *mem)
-{
-	return mem->state == MEM_OFFLINE;
-}
-
 static struct attribute *memory_root_attrs[] = {
 #ifdef CONFIG_ARCH_MEMORY_PROBE
 	&dev_attr_probe.attr,
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 409196ef8038..de87545eabe9 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -11,7 +11,6 @@ struct page;
 struct zone;
 struct pglist_data;
 struct mem_section;
-struct memory_block;
 struct memory_group;
 struct resource;
 struct vmem_altmap;
@@ -352,7 +351,6 @@ extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
 extern void remove_pfn_range_from_zone(struct zone *zone,
 				       unsigned long start_pfn,
 				       unsigned long nr_pages);
-extern bool is_memblock_offlined(struct memory_block *mem);
 extern int sparse_add_section(int nid, unsigned long pfn,
 		unsigned long nr_pages, struct vmem_altmap *altmap,
 		struct dev_pagemap *pgmap);
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 2fd45ccbce45..9ae1f98548b1 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1969,11 +1969,10 @@ int __ref offline_pages(unsigned long start_pfn, unsigned long nr_pages,
 
 static int check_memblock_offlined_cb(struct memory_block *mem, void *arg)
 {
-	int ret = !is_memblock_offlined(mem);
 	int *nid = arg;
 
 	*nid = mem->nid;
-	if (unlikely(ret)) {
+	if (unlikely(mem->state != MEM_OFFLINE)) {
 		phys_addr_t beginpa, endpa;
 
 		beginpa = PFN_PHYS(section_nr_to_pfn(mem->start_section_nr));
-- 
2.35.3