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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _LINUX_IOREMAP_H | |
3 | #define _LINUX_IOREMAP_H | |
4 | ||
5 | #include <linux/kasan.h> | |
6 | #include <asm/pgtable.h> | |
7 | ||
8 | #if defined(CONFIG_HAS_IOMEM) || defined(CONFIG_GENERIC_IOREMAP) | |
9 | /* | |
10 | * Ioremap often, but not always uses the generic vmalloc area. E.g on | |
11 | * Power ARCH, it could have different ioremap space. | |
12 | */ | |
13 | #ifndef IOREMAP_START | |
14 | #define IOREMAP_START VMALLOC_START | |
15 | #define IOREMAP_END VMALLOC_END | |
16 | #endif | |
17 | static inline bool is_ioremap_addr(const void *x) | |
18 | { | |
19 | unsigned long addr = (unsigned long)kasan_reset_tag(x); | |
20 | ||
21 | return addr >= IOREMAP_START && addr < IOREMAP_END; | |
22 | } | |
23 | #else | |
24 | static inline bool is_ioremap_addr(const void *x) | |
25 | { | |
26 | return false; | |
27 | } | |
28 | #endif | |
29 | ||
30 | #endif /* _LINUX_IOREMAP_H */ |