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 */
31
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