linux-stable/include/linux/bootmem_info.h
Liu Shixin 028725e733 bootmem: remove the vmemmap pages from kmemleak in free_bootmem_page
commit dd0ff4d12d ("bootmem: remove the vmemmap pages from kmemleak in
put_page_bootmem") fix an overlaps existing problem of kmemleak.  But the
problem still existed when HAVE_BOOTMEM_INFO_NODE is disabled, because in
this case, free_bootmem_page() will call free_reserved_page() directly.

Fix the problem by adding kmemleak_free_part() in free_bootmem_page() when
HAVE_BOOTMEM_INFO_NODE is disabled.

Link: https://lkml.kernel.org/r/20230704101942.2819426-1-liushixin2@huawei.com
Fixes: f41f2ed43c ("mm: hugetlb: free the vmemmap pages associated with each HugeTLB page")
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-07-08 09:29:31 -07:00

68 lines
1.7 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_BOOTMEM_INFO_H
#define __LINUX_BOOTMEM_INFO_H
#include <linux/mm.h>
#include <linux/kmemleak.h>
/*
* Types for free bootmem stored in page->lru.next. These have to be in
* some random range in unsigned long space for debugging purposes.
*/
enum {
MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12,
SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE,
MIX_SECTION_INFO,
NODE_INFO,
MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO,
};
#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
void __init register_page_bootmem_info_node(struct pglist_data *pgdat);
void get_page_bootmem(unsigned long info, struct page *page,
unsigned long type);
void put_page_bootmem(struct page *page);
/*
* Any memory allocated via the memblock allocator and not via the
* buddy will be marked reserved already in the memmap. For those
* pages, we can call this function to free it to buddy allocator.
*/
static inline void free_bootmem_page(struct page *page)
{
unsigned long magic = page->index;
/*
* The reserve_bootmem_region sets the reserved flag on bootmem
* pages.
*/
VM_BUG_ON_PAGE(page_ref_count(page) != 2, page);
if (magic == SECTION_INFO || magic == MIX_SECTION_INFO)
put_page_bootmem(page);
else
VM_BUG_ON_PAGE(1, page);
}
#else
static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
{
}
static inline void put_page_bootmem(struct page *page)
{
}
static inline void get_page_bootmem(unsigned long info, struct page *page,
unsigned long type)
{
}
static inline void free_bootmem_page(struct page *page)
{
kmemleak_free_part(page_to_virt(page), PAGE_SIZE);
free_reserved_page(page);
}
#endif
#endif /* __LINUX_BOOTMEM_INFO_H */