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authorMatthew Wilcox (Oracle) <willy@infradead.org>2021-10-04 14:46:48 +0100
committerVlastimil Babka <vbabka@suse.cz>2022-01-06 12:27:03 +0100
commitc5e97ed154589524a1df4ae2be55c4cfdb0d0573 (patch)
tree95cb494d3206da298e780e77ad9a8699d21548b6 /mm/bootmem_info.c
parentffedd09fa9b06d0d79e123bbf4ec81125456d982 (diff)
bootmem: Use page->index instead of page->freelist
page->freelist is for the use of slab. Using page->index is the same set of bits as page->freelist, and by using an integer instead of a pointer, we can avoid casts. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: <x86@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com>
Diffstat (limited to 'mm/bootmem_info.c')
-rw-r--r--mm/bootmem_info.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/mm/bootmem_info.c b/mm/bootmem_info.c
index f03f42f426f6..f18a631e7479 100644
--- a/mm/bootmem_info.c
+++ b/mm/bootmem_info.c
@@ -15,7 +15,7 @@
void get_page_bootmem(unsigned long info, struct page *page, unsigned long type)
{
- page->freelist = (void *)type;
+ page->index = type;
SetPagePrivate(page);
set_page_private(page, info);
page_ref_inc(page);
@@ -23,14 +23,13 @@ void get_page_bootmem(unsigned long info, struct page *page, unsigned long type)
void put_page_bootmem(struct page *page)
{
- unsigned long type;
+ unsigned long type = page->index;
- type = (unsigned long) page->freelist;
BUG_ON(type < MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE ||
type > MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE);
if (page_ref_dec_return(page) == 1) {
- page->freelist = NULL;
+ page->index = 0;
ClearPagePrivate(page);
set_page_private(page, 0);
INIT_LIST_HEAD(&page->lru);