Le 11/11/2016 à 21:43, Will Deacon a écrit : > On Fri, Nov 11, 2016 at 04:44:43PM -0800, Florian Fainelli wrote: >> When CONFIG_DEBUG_VM is turned on, virt_to_phys() maps to >> debug_virt_to_phys() which helps catch vmalloc space addresses being >> passed. This is helpful in debugging bogus drivers that just assume >> linear mappings all over the place. >> >> For ARM, ARM64, Unicore32 and Microblaze, the architectures define >> __virt_to_phys() as being the functional implementation of the address >> translation, so we special case the debug stub to call into >> __virt_to_phys directly. >> >> Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx> >> --- >> arch/arm/include/asm/memory.h | 4 ++++ >> arch/arm64/include/asm/memory.h | 4 ++++ >> include/asm-generic/memory_model.h | 4 ++++ >> mm/debug.c | 15 +++++++++++++++ >> 4 files changed, 27 insertions(+) > > What's the interaction between this and the DEBUG_VIRTUAL patches from Laura? > > http://lkml.kernel.org/r/20161102210054.16621-7-labbott@xxxxxxxxxx > > They seem to be tackling the exact same problem afaict. Indeed thanks for pointing that out, I guess I could piggy back on this patchset and try to cover ARM. Thanks! -- Florian -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>