Cregit: Linux 5.6: balloon.h

Contributors: 5
Author	Tokens	Token Proportion	Commits	Commit Proportion
Daniel De Graaf	57	50.44%	1	16.67%
Konrad Rzeszutek Wilk	26	23.01%	1	16.67%
Juergen Gross	21	18.58%	1	16.67%
David Vrabel	8	7.08%	2	33.33%
Greg Kroah-Hartman	1	0.88%	1	16.67%
Total	113		6

/* SPDX-License-Identifier: GPL-2.0 */
/******************************************************************************
 * Xen balloon functionality
 */

#define RETRY_UNLIMITED	0

struct balloon_stats {
	/* We aim for 'current allocation' == 'target allocation'. */
	unsigned long current_pages;
	unsigned long target_pages;
	unsigned long target_unpopulated;
	/* Number of pages in high- and low-memory balloons. */
	unsigned long balloon_low;
	unsigned long balloon_high;
	unsigned long total_pages;
	unsigned long schedule_delay;
	unsigned long max_schedule_delay;
	unsigned long retry_count;
	unsigned long max_retry_count;
};

extern struct balloon_stats balloon_stats;

void balloon_set_new_target(unsigned long target);

int alloc_xenballooned_pages(int nr_pages, struct page **pages);
void free_xenballooned_pages(int nr_pages, struct page **pages);

#ifdef CONFIG_XEN_BALLOON
void xen_balloon_init(void);
#else
static inline void xen_balloon_init(void)
{
}
#endif