In preparation for handling platform differentiated memory types beyond persistent memory, uplevel the "region" identifier to a global number space. This enables a device-dax instance to be registered to any memory type with guaranteed unique names.
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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ | ||
| 2 | #ifndef _MEMREGION_H_ | ||
| 3 | #define _MEMREGION_H_ | ||
| 4 | #include <linux/types.h> | ||
| 5 | #include <linux/errno.h> | ||
| 6 | |||
| 7 | #ifdef CONFIG_MEMREGION | ||
| 8 | int memregion_alloc(gfp_t gfp); | ||
| 9 | void memregion_free(int id); | ||
| 10 | #else | ||
| 11 | static inline int memregion_alloc(gfp_t gfp) | ||
| 12 | { | ||
| 13 | return -ENOMEM; | ||
| 14 | } | ||
| 15 | void memregion_free(int id) | ||
| 16 | { | ||
| 17 | } | ||
| 18 | #endif | ||
| 19 | #endif /* _MEMREGION_H_ */ | ||