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.
[PATCH v1] 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. [PATCH v2] On patch 1: Fix build as module error for redefinition of 'romz_unregister' and 'romz_register' [PATCH v3] On patch 1: Fix build as module error for undefined 'vfs_read' and 'vfs_write' Both of 'vfs_read' and 'vfs_write' haven't be exproted yet, so we use 'kernel_read' and 'kernel_write' instead. 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 | 957 +++++++++++++++++++++++++++++++++++++++++++++ include/linux/pstore_rom.h | 61 +++ 5 files changed, 1085 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
