linux/arch/x86/mm/pat/memtype.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __MEMTYPE_H_
#define __MEMTYPE_H_

extern int pat_debug_enable;

#define dprintk(fmt, arg...) …

struct memtype { … };

static inline char *cattr_name(enum page_cache_mode pcm)
{ … }

#ifdef CONFIG_X86_PAT
extern int memtype_check_insert(struct memtype *entry_new,
				enum page_cache_mode *new_type);
extern struct memtype *memtype_erase(u64 start, u64 end);
extern struct memtype *memtype_lookup(u64 addr);
extern int memtype_copy_nth_element(struct memtype *entry_out, loff_t pos);
#else
static inline int memtype_check_insert(struct memtype *entry_new,
				       enum page_cache_mode *new_type)
{ return 0; }
static inline struct memtype *memtype_erase(u64 start, u64 end)
{ return NULL; }
static inline struct memtype *memtype_lookup(u64 addr)
{ return NULL; }
static inline int memtype_copy_nth_element(struct memtype *out, loff_t pos)
{ return 0; }
#endif

#endif /* __MEMTYPE_H_ */