diff options
Diffstat (limited to 'mm/shuffle.h')
| -rw-r--r-- | mm/shuffle.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/mm/shuffle.h b/mm/shuffle.h new file mode 100644 index 000000000..cec62984f --- /dev/null +++ b/mm/shuffle.h @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright(c) 2018 Intel Corporation. All rights reserved. +#ifndef _MM_SHUFFLE_H +#define _MM_SHUFFLE_H +#include <linux/jump_label.h> + +#define SHUFFLE_ORDER (MAX_ORDER-1) + +#ifdef CONFIG_SHUFFLE_PAGE_ALLOCATOR +DECLARE_STATIC_KEY_FALSE(page_alloc_shuffle_key); +extern void __shuffle_free_memory(pg_data_t *pgdat); +extern bool shuffle_pick_tail(void); +static inline void __meminit shuffle_free_memory(pg_data_t *pgdat) +{ + if (!static_branch_unlikely(&page_alloc_shuffle_key)) + return; + __shuffle_free_memory(pgdat); +} + +extern void __shuffle_zone(struct zone *z); +static inline void __meminit shuffle_zone(struct zone *z) +{ + if (!static_branch_unlikely(&page_alloc_shuffle_key)) + return; + __shuffle_zone(z); +} + +static inline bool is_shuffle_order(int order) +{ + if (!static_branch_unlikely(&page_alloc_shuffle_key)) + return false; + return order >= SHUFFLE_ORDER; +} +#else +static inline bool shuffle_pick_tail(void) +{ + return false; +} + +static inline void shuffle_free_memory(pg_data_t *pgdat) +{ +} + +static inline void shuffle_zone(struct zone *z) +{ +} + +static inline bool is_shuffle_order(int order) +{ + return false; +} +#endif +#endif /* _MM_SHUFFLE_H */ |