1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _LINUX_SWAPFILE_H 3#define _LINUX_SWAPFILE_H 4 5/* 6 * these were static in swapfile.c but frontswap.c needs them and we don't 7 * want to expose them to the dozens of source files that include swap.h 8 */ 9extern spinlock_t swap_lock; 10extern struct plist_head swap_active_head; 11extern struct swap_info_struct *swap_info[]; 12extern int try_to_unuse(unsigned int, bool, unsigned long); 13extern unsigned long generic_max_swapfile_size(void); 14extern unsigned long max_swapfile_size(void); 15 16#endif /* _LINUX_SWAPFILE_H */ 17