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 (2): ACPI / debugger: Add kernel flushing support tools/power/acpi/acpidbg: Use new flushing mechanism drivers/acpi/acpi_dbg.c | 98 ++++++++++++++++++++++++++++-- include/linux/acpi-ioctls.h | 21 +++++++ tools/power/acpi/tools/acpidbg/acpidbg.c | 51 +++------------- 3 files changed, 122 insertions(+), 48 deletions(-) create mode 100644 include/linux/acpi-ioctls.h -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
