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authorNicolas Pitre <nico@fluxnic.net>2010-09-22 18:34:36 -0400
committerNicolas Pitre <nicolas.pitre@linaro.org>2010-10-01 22:31:34 -0400
commit087aaffcdf9c91667c93923fbc05fa8fb6bc7d3a (patch)
treeec94d9fd07baa4802ff0a3a2811ef3c3e1c7f3f3 /arch/arm/include/asm
parent7c63984b86f96c71c541132c74c4b56fe2a13e1a (diff)
downloadblackbird-op-linux-087aaffcdf9c91667c93923fbc05fa8fb6bc7d3a.tar.gz
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ARM: implement CONFIG_STRICT_DEVMEM by disabling access to RAM via /dev/mem
There are very few legitimate use cases, if any, for directly accessing system RAM through /dev/mem. So let's mimic what they do on x86 and forbid it when CONFIG_STRICT_DEVMEM is turned on. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Diffstat (limited to 'arch/arm/include/asm')
-rw-r--r--arch/arm/include/asm/io.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 1261b1f928d9..815efa2d4e07 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -294,6 +294,7 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
#define ARCH_HAS_VALID_PHYS_ADDR_RANGE
extern int valid_phys_addr_range(unsigned long addr, size_t size);
extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
+extern int devmem_is_allowed(unsigned long pfn);
#endif
/*
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