pstore_rom is similar to pstore_ram, but dump log to block devices rather than persistent ram.
Why should we need pstore_rom? 1. Most embedded intelligent equipment have no persistent ram, which increases costs. We perfer to cheaper solutions, like block devices. In fast, there is already a sample for block device logger in driver MTD (drivers/mtd/mtdoops.c). 2. Do not any equipment have battery, which means that it lost all data on general ram if power failure. Pstore has little to do for these equipments. On patch 1: Core codes of pstore_rom, which works well on allwinner(sunxi) platform. On patch 2: A sample for pstore_rom, using general ram rather than block device. liaoweixiong (2): pstore/rom: new support logger for block devices pstore/rom: add sample for pstore_rom fs/pstore/Kconfig | 16 + fs/pstore/Makefile | 5 + fs/pstore/rombuf.c | 46 +++ fs/pstore/romzone.c | 965 +++++++++++++++++++++++++++++++++++++++++++++ include/linux/pstore_rom.h | 68 ++++ 5 files changed, 1100 insertions(+) create mode 100644 fs/pstore/rombuf.c create mode 100644 fs/pstore/romzone.c create mode 100644 include/linux/pstore_rom.h -- 1.9.1
