This patch series takes the common bits from the x86 early ioremap implementation and creates a generic implementation which may be used by other architectures. The early ioremap interfaces are intended for situations where boot code needs to make temporary virtual mappings before the normal ioremap interfaces are available. Typically, this means before paging_init() has run. These patches are layered on top of generic fixmap patches which were discussed here (and are in the akpm tree): http://lkml.org/lkml/2013/11/25/474 This is version 2 of the patch series. These patches (and underlying fixmap patches) may be found at: git://github.com/mosalter/linux.git (early-ioremap-v2 branch) Changes from version 1: * Moved the generic code into linux/mm instead of linux/lib * Have early_memremap() return normal pointer instead of __iomem This is in response to sparse warning cleanups being made in an unrelated patch series: https://lkml.org/lkml/2013/12/22/69 * Added arm64 patch to call init_mem_pgprot() earlier so that the pgprot macros are valid in time for early_ioremap use * Added validity checking for early_ioremap pgd, pud, and pmd in arm64 Mark Salter (5): mm: create generic early_ioremap() support x86: use generic early_ioremap arm: add early_ioremap support arm64: initialize pgprot info earlier in boot arm64: add early_ioremap support Documentation/arm64/memory.txt | 4 +- arch/arm/Kconfig | 11 ++ arch/arm/include/asm/Kbuild | 1 + arch/arm/include/asm/fixmap.h | 18 +++ arch/arm/include/asm/io.h | 1 + arch/arm/kernel/setup.c | 3 + arch/arm/mm/Makefile | 1 + arch/arm/mm/early_ioremap.c | 93 ++++++++++++++ arch/arm/mm/mmu.c | 2 + arch/arm64/Kconfig | 1 + arch/arm64/include/asm/Kbuild | 1 + arch/arm64/include/asm/fixmap.h | 68 ++++++++++ arch/arm64/include/asm/io.h | 1 + arch/arm64/include/asm/memory.h | 2 +- arch/arm64/include/asm/mmu.h | 1 + arch/arm64/kernel/early_printk.c | 8 +- arch/arm64/kernel/head.S | 9 +- arch/arm64/kernel/setup.c | 4 + arch/arm64/mm/ioremap.c | 85 ++++++++++++ arch/arm64/mm/mmu.c | 44 +------ arch/x86/Kconfig | 1 + arch/x86/include/asm/Kbuild | 1 + arch/x86/include/asm/fixmap.h | 6 + arch/x86/include/asm/io.h | 14 +- arch/x86/mm/ioremap.c | 224 +------------------------------- arch/x86/mm/pgtable_32.c | 2 +- include/asm-generic/early_ioremap.h | 41 ++++++ mm/Kconfig | 3 + mm/Makefile | 1 + mm/early_ioremap.c | 249 ++++++++++++++++++++++++++++++++++++ 30 files changed, 611 insertions(+), 289 deletions(-) create mode 100644 arch/arm/mm/early_ioremap.c create mode 100644 arch/arm64/include/asm/fixmap.h create mode 100644 include/asm-generic/early_ioremap.h create mode 100644 mm/early_ioremap.c -- 1.8.3.1 -- 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>