AML debugger is implemented in the kernel as a character device located in the debugfs. Currently, when its batch mode is used, the userspace tool needs to flush the logs/prompts remained in the kernel output buffer, this is implemented in an inefficient way in the userspace by polling the IO and reading everything out.
This patch introduces a kernel space flushing support, so that userspace can invoke ioctl() to put the driver into a state waiting for new commands, all kernel space logs/prompts will be automatically discarded by ioctl(). Lv Zheng (3): ACPI / debugger: Add kernel flushing support tools/power/acpi/acpidbg: Use new flushing mechanism tools/power/acpi/acpidbg: Add multi-commands support in batch mode drivers/acpi/acpi_dbg.c | 85 +++++++++++++++++++++-- include/linux/acpi.h | 1 + include/uapi/linux/acpi-ioctls.h | 21 ++++++ tools/power/acpi/tools/acpidbg/acpidbg.c | 110 +++++++++++++++++------------- 4 files changed, 165 insertions(+), 52 deletions(-) create mode 100644 include/uapi/linux/acpi-ioctls.h -- 1.7.10
