[PATCH 0/3] ACPI / debugger: Add kernel flushing support

[Lv Zheng]

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 fsync() to put the driver into a state waiting for new commands,
all kernel space logs/prompts will be automatically discarded by fsync().

Lv Zheng (3):
  debugfs: Add .fsync() callback proxy support
  ACPI / debugger: Add kernel flushing support
  tools/power/acpi/acpidbg: Use new flushing mechanism

 drivers/acpi/acpi_dbg.c                  |   94 ++++++++++++++++++++++++++++--
 fs/debugfs/file.c                        |    6 ++
 tools/power/acpi/tools/acpidbg/acpidbg.c |   49 ++--------------
 3 files changed, 101 insertions(+), 48 deletions(-)

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1.7.10