diff options
Diffstat (limited to 'include/linux/quicklist.h')
| -rw-r--r-- | include/linux/quicklist.h | 94 | 
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 <[email protected]> - */ -#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 */ -  |