summaryrefslogtreecommitdiff
path: root/include/linux/quicklist.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/quicklist.h')
-rw-r--r--include/linux/quicklist.h94
1 files changed, 0 insertions, 94 deletions
diff --git a/include/linux/quicklist.h b/include/linux/quicklist.h
deleted file mode 100644
index 034982c98c8b..000000000000
--- a/include/linux/quicklist.h
+++ /dev/null
@@ -1,94 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef LINUX_QUICKLIST_H
-#define LINUX_QUICKLIST_H
-/*
- * Fast allocations and disposal of pages. Pages must be in the condition
- * as needed after allocation when they are freed. Per cpu lists of pages
- * are kept that only contain node local pages.
- *
- * (C) 2007, SGI. Christoph Lameter <cl@linux.com>
- */
-#include <linux/kernel.h>
-#include <linux/gfp.h>
-#include <linux/percpu.h>
-
-#ifdef CONFIG_QUICKLIST
-
-struct quicklist {
- void *page;
- int nr_pages;
-};
-
-DECLARE_PER_CPU(struct quicklist, quicklist)[CONFIG_NR_QUICK];
-
-/*
- * The two key functions quicklist_alloc and quicklist_free are inline so
- * that they may be custom compiled for the platform.
- * Specifying a NULL ctor can remove constructor support. Specifying
- * a constant quicklist allows the determination of the exact address
- * in the per cpu area.
- *
- * The fast patch in quicklist_alloc touched only a per cpu cacheline and
- * the first cacheline of the page itself. There is minmal overhead involved.
- */
-static inline void *quicklist_alloc(int nr, gfp_t flags, void (*ctor)(void *))
-{
- struct quicklist *q;
- void **p = NULL;
-
- q =&get_cpu_var(quicklist)[nr];
- p = q->page;
- if (likely(p)) {
- q->page = p[0];
- p[0] = NULL;
- q->nr_pages--;
- }
- put_cpu_var(quicklist);
- if (likely(p))
- return p;
-
- p = (void *)__get_free_page(flags | __GFP_ZERO);
- if (ctor && p)
- ctor(p);
- return p;
-}
-
-static inline void __quicklist_free(int nr, void (*dtor)(void *), void *p,
- struct page *page)
-{
- struct quicklist *q;
-
- q = &get_cpu_var(quicklist)[nr];
- *(void **)p = q->page;
- q->page = p;
- q->nr_pages++;
- put_cpu_var(quicklist);
-}
-
-static inline void quicklist_free(int nr, void (*dtor)(void *), void *pp)
-{
- __quicklist_free(nr, dtor, pp, virt_to_page(pp));
-}
-
-static inline void quicklist_free_page(int nr, void (*dtor)(void *),
- struct page *page)
-{
- __quicklist_free(nr, dtor, page_address(page), page);
-}
-
-void quicklist_trim(int nr, void (*dtor)(void *),
- unsigned long min_pages, unsigned long max_free);
-
-unsigned long quicklist_total_size(void);
-
-#else
-
-static inline unsigned long quicklist_total_size(void)
-{
- return 0;
-}
-
-#endif
-
-#endif /* LINUX_QUICKLIST_H */
-