The pmem api is responsible for shepherding data out to persistent media. The pmem driver uses this api, when available, to assert that data is durable by the time bio_endio() is invoked. When an architecture or cpu can not make persistence guarantees the driver warns and falls back to "best effort" implementation. Changes since v3 [1]: Rebased on tip/master now that Toshi's ioremap_wt() patches have landed in -tip. The primary change was reflowing the patches against the newly alphabetized 'select' options under config X86. [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-June/001081.html --- Dan Williams (5): arch: unify ioremap prototypes and macro aliases cleanup IORESOURCE_CACHEABLE vs ioremap() arch/*/asm/io.h: add ioremap_cache() to all architectures devm: fix ioremap_cache() usage arch: introduce memremap_cache() and memremap_wt() Ross Zwisler (1): arch, x86: pmem api for ensuring durability of persistent memory updates arch/arc/include/asm/io.h | 1 arch/arm/Kconfig | 1 arch/arm/include/asm/io.h | 2 + arch/arm/mach-clps711x/board-cdb89712.c | 2 - arch/arm64/Kconfig | 1 arch/arm64/include/asm/io.h | 3 + arch/arm64/kernel/efi.c | 4 + arch/arm64/kernel/smp_spin_table.c | 10 ++- arch/avr32/include/asm/io.h | 1 arch/cris/include/asm/io.h | 8 +- arch/cris/mm/ioremap.c | 6 +- arch/frv/Kconfig | 1 arch/frv/include/asm/io.h | 6 ++ arch/ia64/include/asm/io.h | 9 +-- arch/ia64/mm/ioremap.c | 4 + arch/m32r/include/asm/io.h | 1 arch/m68k/Kconfig | 1 arch/m68k/include/asm/io_mm.h | 7 ++ arch/m68k/include/asm/io_no.h | 5 ++ arch/metag/Kconfig | 1 arch/metag/include/asm/io.h | 5 ++ arch/microblaze/include/asm/io.h | 1 arch/mips/Kconfig | 1 arch/mips/include/asm/io.h | 17 ++++- arch/mn10300/include/asm/io.h | 1 arch/nios2/include/asm/io.h | 1 arch/powerpc/Kconfig | 1 arch/powerpc/include/asm/io.h | 2 - arch/powerpc/kernel/pci_of_scan.c | 2 - arch/s390/include/asm/io.h | 1 arch/sparc/include/asm/io_32.h | 1 arch/sparc/include/asm/io_64.h | 9 ++- arch/sparc/kernel/pci.c | 3 - arch/tile/include/asm/io.h | 1 arch/x86/Kconfig | 2 + arch/x86/include/asm/cacheflush.h | 36 +++++++++++ arch/x86/include/asm/io.h | 7 ++ arch/x86/kernel/crash_dump_64.c | 6 +- arch/x86/kernel/kdebugfs.c | 8 +- arch/x86/kernel/ksysfs.c | 28 ++++----- arch/x86/mm/ioremap.c | 10 +-- arch/xtensa/Kconfig | 1 arch/xtensa/include/asm/io.h | 3 + drivers/acpi/apei/einj.c | 8 +- drivers/acpi/apei/erst.c | 4 + drivers/block/Kconfig | 1 drivers/block/pmem.c | 76 +++++++++++++++++++++-- drivers/firmware/google/memconsole.c | 4 + drivers/pci/probe.c | 3 - drivers/pnp/manager.c | 2 - drivers/scsi/aic94xx/aic94xx_init.c | 7 -- drivers/scsi/arcmsr/arcmsr_hba.c | 5 -- drivers/scsi/mvsas/mv_init.c | 15 +---- drivers/video/fbdev/ocfb.c | 1 include/asm-generic/io.h | 8 ++ include/asm-generic/iomap.h | 4 + include/linux/compiler.h | 2 + include/linux/device.h | 5 ++ include/linux/io.h | 6 ++ include/linux/pmem.h | 102 +++++++++++++++++++++++++++++++ kernel/resource.c | 41 ++++++++++++ lib/Kconfig | 8 ++ lib/devres.c | 48 ++++++--------- lib/pci_iomap.c | 7 +- 64 files changed, 440 insertions(+), 138 deletions(-) create mode 100644 include/linux/pmem.h -- 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>