mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 19:26:41 +07:00
93d3b7140a
Currently pagevec_lookup_range_tag() takes number of pages to look up but most users don't need this. Create a new function pagevec_lookup_range_nr_tag() that takes maximum number of pages to lookup for Ceph which wants this functionality so that we can drop nr_pages argument from pagevec_lookup_range_tag(). Link: http://lkml.kernel.org/r/20171009151359.31984-13-jack@suse.cz Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* include/linux/pagevec.h
|
|
*
|
|
* In many places it is efficient to batch an operation up against multiple
|
|
* pages. A pagevec is a multipage container which is used for that.
|
|
*/
|
|
|
|
#ifndef _LINUX_PAGEVEC_H
|
|
#define _LINUX_PAGEVEC_H
|
|
|
|
/* 14 pointers + two long's align the pagevec structure to a power of two */
|
|
#define PAGEVEC_SIZE 14
|
|
|
|
struct page;
|
|
struct address_space;
|
|
|
|
struct pagevec {
|
|
unsigned long nr;
|
|
unsigned long cold;
|
|
struct page *pages[PAGEVEC_SIZE];
|
|
};
|
|
|
|
void __pagevec_release(struct pagevec *pvec);
|
|
void __pagevec_lru_add(struct pagevec *pvec);
|
|
unsigned pagevec_lookup_entries(struct pagevec *pvec,
|
|
struct address_space *mapping,
|
|
pgoff_t start, unsigned nr_entries,
|
|
pgoff_t *indices);
|
|
void pagevec_remove_exceptionals(struct pagevec *pvec);
|
|
unsigned pagevec_lookup_range(struct pagevec *pvec,
|
|
struct address_space *mapping,
|
|
pgoff_t *start, pgoff_t end);
|
|
static inline unsigned pagevec_lookup(struct pagevec *pvec,
|
|
struct address_space *mapping,
|
|
pgoff_t *start)
|
|
{
|
|
return pagevec_lookup_range(pvec, mapping, start, (pgoff_t)-1);
|
|
}
|
|
|
|
unsigned pagevec_lookup_range_tag(struct pagevec *pvec,
|
|
struct address_space *mapping, pgoff_t *index, pgoff_t end,
|
|
int tag, unsigned nr_pages);
|
|
unsigned pagevec_lookup_range_nr_tag(struct pagevec *pvec,
|
|
struct address_space *mapping, pgoff_t *index, pgoff_t end,
|
|
int tag, unsigned max_pages);
|
|
static inline unsigned pagevec_lookup_tag(struct pagevec *pvec,
|
|
struct address_space *mapping, pgoff_t *index, int tag,
|
|
unsigned nr_pages)
|
|
{
|
|
return pagevec_lookup_range_tag(pvec, mapping, index, (pgoff_t)-1, tag,
|
|
nr_pages);
|
|
}
|
|
|
|
static inline void pagevec_init(struct pagevec *pvec, int cold)
|
|
{
|
|
pvec->nr = 0;
|
|
pvec->cold = cold;
|
|
}
|
|
|
|
static inline void pagevec_reinit(struct pagevec *pvec)
|
|
{
|
|
pvec->nr = 0;
|
|
}
|
|
|
|
static inline unsigned pagevec_count(struct pagevec *pvec)
|
|
{
|
|
return pvec->nr;
|
|
}
|
|
|
|
static inline unsigned pagevec_space(struct pagevec *pvec)
|
|
{
|
|
return PAGEVEC_SIZE - pvec->nr;
|
|
}
|
|
|
|
/*
|
|
* Add a page to a pagevec. Returns the number of slots still available.
|
|
*/
|
|
static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page)
|
|
{
|
|
pvec->pages[pvec->nr++] = page;
|
|
return pagevec_space(pvec);
|
|
}
|
|
|
|
static inline void pagevec_release(struct pagevec *pvec)
|
|
{
|
|
if (pagevec_count(pvec))
|
|
__pagevec_release(pvec);
|
|
}
|
|
|
|
#endif /* _LINUX_PAGEVEC_H */
|