[GIT PULL] printk for 5.11

* [GIT PULL] printk for 5.11
@ 2020-12-14 15:18 Petr Mladek
  2020-12-16 19:44 ` pr-tracker-bot
  0 siblings, 1 reply; 2+ messages in thread
From: Petr Mladek @ 2020-12-14 15:18 UTC (permalink / raw)
  To: Linus Torvalds
  Cc: Sergey Senozhatsky, Steven Rostedt, John Ogness, Andy Shevchenko,
	Rasmus Villemoes, Peter Zijlstra, linux-kernel, Daniel Thompson

Linus,

please pull the latest printk changes from

  git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux.git tags/printk-for-5.11

==============================

- Finally allow parallel writes and reads into/from the lockless
  ringbuffer. But it is not a complete solution. Readers are still
  serialized against each other. And nested writes are still
  prevented by printk_safe per-CPU buffers.

- Use ttynull as the ultimate fallback for /dev/console.

- Officially allow to disable console output by using console="" or
  console=null

- Few code cleanups.

==============================

We believe that the risk of logbuf_lock removal is small.
It is another important step in the printk rework. We are
moving slowly and carefully.

----------------------------------------------------------------
John Ogness (2):
      printk: inline log_output(),log_store() in vprintk_store()
      printk: remove logbuf_lock writer-protection of ringbuffer

Lukas Bulwahn (1):
      printk: remove obsolete dead assignment

Nikolay Borisov (1):
      printk: ringbuffer: Reference text_data_ring directly in callees.

Petr Mladek (4):
      init/console: Use ttynull as a fallback when there is no console
      printk/console: Allow to disable console output by using console="" or console=null
      Merge branch 'for-5.11-null-console' into for-linus
      Merge branch 'for-5.11' into for-linus

 drivers/tty/Kconfig               |  14 ---
 drivers/tty/Makefile              |   3 +-
 drivers/tty/ttynull.c             |  18 +++
 include/linux/console.h           |   3 +
 init/main.c                       |  10 +-
 kernel/printk/printk.c            | 257 +++++++++++++++++++++++---------------
 kernel/printk/printk_ringbuffer.c |  32 +++--
 7 files changed, 200 insertions(+), 137 deletions(-)

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