diff options
| author | Nicolas Pitre <nico@fluxnic.net> | 2010-09-22 18:34:36 -0400 |
|---|---|---|
| committer | Nicolas Pitre <nicolas.pitre@linaro.org> | 2010-10-01 22:31:34 -0400 |
| commit | 087aaffcdf9c91667c93923fbc05fa8fb6bc7d3a (patch) | |
| tree | ec94d9fd07baa4802ff0a3a2811ef3c3e1c7f3f3 /arch/arm/include | |
| parent | 7c63984b86f96c71c541132c74c4b56fe2a13e1a (diff) | |
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')
| -rw-r--r-- | arch/arm/include/asm/io.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h index 1261b1f928d..815efa2d4e0 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 /* |