From: Rob Ward <robert.ward...@googlemail.com> Makes the /dev/mem device optional using the CONFIG_DEVMEM option.
This brings /dev/mem in line with /dev/kmem so it can de disabled. Disabling /dev/mem is preferable on devices that do not require direct access to memory in order to improve security. This is especially true on platforms where no restiction is placed on the areas of memory that can be accessed(for example mips) without custom modifcations to the kernel source. The implementation of this functionality declares the mem_fops structure as __maybe_unused to eliminate the need for #ifdefs throughout the file. Follow up changes are present to change CONFIG_DEVKMEM and CONFIG_DEVPORT to use __maybe_unused. This simplifies the code and make the implementations consistent. Rob Ward (3): drivers: char: mem: Make /dev/mem an optional device drivers: char: mem: Simplify DEVKMEM configuration drivers: char: mem: Simplify DEVPORT configuration drivers/char/Kconfig | 9 +++++++++ drivers/char/mem.c | 18 +++++------------- 2 files changed, 14 insertions(+), 13 deletions(-) -- 2.0.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
