Hi, This is v2 of the series to add CONFIG_DEBUG_VIRTUAL support from arm64. This has been split out into a number of patches: Patch #1 Adds ARCH_HAS_DEBUG_VIRTUAL to avoid the need for adding arch dependencies for DEBUG_VIRTUAL. This touches arch/x86/Kconfig Patch #2 Cleans up cma to not rely on __pa_nodebug and have an #ifdef inline in the function. Patch #3 Adjust some macros in arm64 memory.h to be under __ASSEMBLY__ protection Patch #4 Adds a cast for virt_to_pfn since __virt_to_phys for DEBUG_VIRTUAL no longer has a cast. Patch #5 Switches to using __pa_symbol for _end to avoid erroneously triggering a bounds error with the debugging. Patch #6 is the actual implementation of DEBUG_VIRTUAL. The biggest change from the RFCv1 is the addition of __phys_addr_symbol. This is to handle several places where the physical address of _end is needed. x86 avoids this problem by doing its bounds check based on the entire possible image space which is well beyond where _end would end up. There are a few dependencies outside of arm64, so I don't know if it will be easier for this to eventually go through arm64 or the mm tree. Thanks, Laura Laura Abbott (6): lib/Kconfig.debug: Add ARCH_HAS_DEBUG_VIRTUAL mm/cma: Cleanup highmem check arm64: Move some macros under #ifndef __ASSEMBLY__ arm64: Add cast for virt_to_pfn arm64: Use __pa_symbol for _end arm64: Add support for CONFIG_DEBUG_VIRTUAL arch/arm64/Kconfig | 1 + arch/arm64/include/asm/memory.h | 50 ++++++++++++++++++++++++----------------- arch/arm64/mm/Makefile | 2 ++ arch/arm64/mm/init.c | 4 ++-- arch/arm64/mm/physaddr.c | 34 ++++++++++++++++++++++++++++ arch/x86/Kconfig | 1 + lib/Kconfig.debug | 5 ++++- mm/cma.c | 15 +++++-------- 8 files changed, 79 insertions(+), 33 deletions(-) create mode 100644 arch/arm64/mm/physaddr.c -- 2.10.1 -- 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>