linux-kernel - [GIT PULL] printk for 5.12

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Date:   Mon, 22 Feb 2021 14:35:08 +0100
From:   Petr Mladek <pmladek@...e.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        John Ogness <john.ogness@...utronix.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Peter Zijlstra <peterz@...radead.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [GIT PULL] printk for 5.12

Linus,

please pull the latest printk changes from

  git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux.git tags/printk-for-5.12

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

- New "no_hash_pointers" kernel parameter causes that %p shows raw
  pointer values instead of hashed ones. It is intended only for
  debugging purposes. Misuse is prevented by a fat warning message
  that is inspired by trace_printk().

- Prevent a possible deadlock when flushing printk_safe buffers during
  panic().

- Fix performance regression caused by the lockless printk ringbuffer.
  It was visible with huge log buffer and long messages.

- Documentation fix-up.

----------------------------------------------------------------
John Ogness (1):
      printk: avoid prb_first_valid_seq() where possible

Lukas Bulwahn (1):
      printk: rectify kernel-doc for prb_rec_init_wr()

Muchun Song (1):
      printk: fix deadlock when kernel panic

Petr Mladek (2):
      Merge branch 'for-5.12-no_hash_pointers' into for-linus
      Merge branch 'printk-rework' into for-linus

Timur Tabi (3):
      lib: use KSTM_MODULE_GLOBALS macro in kselftest drivers
      kselftest: add support for skipped tests
      lib/vsprintf: no_hash_pointers prints all addresses as unhashed

 Documentation/admin-guide/kernel-parameters.txt | 15 +++++++++++
 kernel/printk/printk.c                          | 28 ++++++++++++-------
 kernel/printk/printk_ringbuffer.h               |  2 +-
 kernel/printk/printk_safe.c                     | 16 ++++++++---
 lib/test_bitmap.c                               |  3 +--
 lib/test_printf.c                               | 12 +++++++--
 lib/vsprintf.c                                  | 36 +++++++++++++++++++++++--
 tools/testing/selftests/kselftest_module.h      | 18 ++++++++-----
 8 files changed, 103 insertions(+), 27 deletions(-)