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Revision f2ebf8ffe7af10bff02d34addbebd9199de65ed2 authored by Riccardo Mancini on 15 July 2021, 16:07:21 UTC, committed by Arnaldo Carvalho de Melo on 15 July 2021, 20:34:39 UTC 
perf trace: Free syscall->arg_fmt
 
ASan reports several memory leaks running:

  # perf test "88: Check open filename arg using perf trace + vfs_getname"

The second of these leaks is caused by the arg_fmt field of syscall not
being deallocated.

This patch adds a new function syscall__exit which is called on all
syscalls.table entries in trace__exit, which will free the arg_fmt
field.

Signed-off-by: Riccardo Mancini <rickyman7@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/d68f25c043d30464ac9fa79c3399e18f429bca82.1626343282.git.rickyman7@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1 parent 6c7f0ab
Raw File
video-output.rst 
Video Output Switcher Control
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

2006 luming.yu@intel.com

The output sysfs class driver provides an abstract video output layer that
can be used to hook platform specific methods to enable/disable video output
device through common sysfs interface. For example, on my IBM ThinkPad T42
laptop, The ACPI video driver registered its output devices and read/write
method for 'state' with output sysfs class. The user interface under sysfs is::

  linux:/sys/class/video_output # tree .
  .
  |-- CRT0
  |   |-- device -> ../../../devices/pci0000:00/0000:00:01.0
  |   |-- state
  |   |-- subsystem -> ../../../class/video_output
  |   `-- uevent
  |-- DVI0
  |   |-- device -> ../../../devices/pci0000:00/0000:00:01.0
  |   |-- state
  |   |-- subsystem -> ../../../class/video_output
  |   `-- uevent
  |-- LCD0
  |   |-- device -> ../../../devices/pci0000:00/0000:00:01.0
  |   |-- state
  |   |-- subsystem -> ../../../class/video_output
  |   `-- uevent
  `-- TV0
     |-- device -> ../../../devices/pci0000:00/0000:00:01.0
     |-- state
     |-- subsystem -> ../../../class/video_output
     `-- uevent
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