summaryrefslogtreecommitdiff
path: root/include/asm-generic
diff options
context:
space:
mode:
authorPalmer Dabbelt <palmerdabbelt@google.com>2020-07-09 11:43:21 -0700
committerPalmer Dabbelt <palmerdabbelt@google.com>2020-12-11 12:28:08 -0800
commit527701eda5f196588df9b36a30651804fea7d1a7 (patch)
treed9afe5b4753aa0ca2ee1829072ead75c153e369b /include/asm-generic
parentbbf5c979011a099af5dc76498918ed7df445635b (diff)
lib: Add a generic version of devmem_is_allowed()
As part of adding support for STRICT_DEVMEM to the RISC-V port, Zong provided a devmem_is_allowed() implementation that's exactly the same as all the others I checked. Instead I'm adding a generic version, which will soon be used. Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/io.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index dabf8cb7203b..da2e861dee1c 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -1122,6 +1122,10 @@ static inline void memcpy_toio(volatile void __iomem *addr, const void *buffer,
}
#endif
+#ifndef CONFIG_GENERIC_DEVMEM_IS_ALLOWED
+extern int devmem_is_allowed(unsigned long pfn);
+#endif
+
#endif /* __KERNEL__ */
#endif /* __ASM_GENERIC_IO_H */