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  */
9 extern struct swap_info_struct *swap_info[];
10 extern unsigned long generic_max_swapfile_size(void);
11 unsigned long arch_max_swapfile_size(void);
12 
13 /* Maximum swapfile size supported for the arch (not inclusive). */
14 extern unsigned long swapfile_maximum_size;
15 /* Whether swap migration entry supports storing A/D bits for the arch */
16 extern bool swap_migration_ad_supported;
17 
18 #endif /* _LINUX_SWAPFILE_H */
19