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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2025-08-03 23:28:48 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2025-08-03 23:28:48 -0700 |
| commit | a7bee4e7f78089c101be2ad51f4b5ec64782053e (patch) | |
| tree | 01c730cd0a71026fb1e74d601e1cbb4d0143126a /include/linux/io.h | |
| parent | 61c6fef7c4b06b4bdbf3142f4e5cace70597e0de (diff) | |
| parent | 45ee66c37f9bd8cff7718c70d84e0291d385a093 (diff) | |
| download | lwn-a7bee4e7f78089c101be2ad51f4b5ec64782053e.tar.gz lwn-a7bee4e7f78089c101be2ad51f4b5ec64782053e.zip | |
Merge tag 'ib-mfd-gpio-input-pwm-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into next
Merge an immutable branch between MFD, GPIO, Input and PWM to resolve
conflicts for the merge window pull request.
Diffstat (limited to 'include/linux/io.h')
| -rw-r--r-- | include/linux/io.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/io.h b/include/linux/io.h index 6a6bc4d46d0a..0642c7ee41db 100644 --- a/include/linux/io.h +++ b/include/linux/io.h @@ -183,4 +183,25 @@ static inline void arch_io_free_memtype_wc(resource_size_t base, int devm_arch_io_reserve_memtype_wc(struct device *dev, resource_size_t start, resource_size_t size); +#ifdef CONFIG_STRICT_DEVMEM +static inline int range_is_allowed(unsigned long pfn, unsigned long size) +{ + u64 from = ((u64)pfn) << PAGE_SHIFT; + u64 to = from + size; + u64 cursor = from; + + while (cursor < to) { + if (!devmem_is_allowed(pfn)) + return 0; + cursor += PAGE_SIZE; + pfn++; + } + return 1; +} +#else +static inline int range_is_allowed(unsigned long pfn, unsigned long size) +{ + return 1; +} +#endif #endif /* _LINUX_IO_H */ |