[GIT PULL] printk for 4.19

[GIT PULL] printk for 4.19

[Petr Mladek]

Linus,

please pull the latest printk changes from

  git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk tags/printk-for-4.19

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

- Different vendors have a different expectation about a console quietness.
  Make it configurable to reduce bike-shedding about the upstream default.

- Decide about the message visibility when the message is stored. It avoids
  races caused by a delayed console handling.

- Always store printk() messages into the per-CPU buffers again in NMI.
  The only exception is when flushing trace log in panic(). There
  the risk of loosing messages is worth an eventual reordering.

- Handle invalid %pO printf modifiers correctly.

- Better handle %p printf modifier tests before crng is initialized.

- Some clean up.


----------------------------------------------------------------
Bart Van Assche (1):
      lib/vsprintf: Do not handle %pO[^F] as %px

Hans de Goede (1):
      printk: Make CONSOLE_LOGLEVEL_QUIET configurable

Maninder Singh (1):
      printk: make sure to print log on console.

Namit Gupta (1):
      printk: Remove unnecessary kmalloc() from syslog during clear

Petr Mladek (6):
      printk: Clean up syslog_print_all()
      printk: Split the code for storing a message into the log buffer
      printk: Create helper function to queue deferred console handling
      printk/nmi: Prevent deadlock when accessing the main log buffer in NMI
      printk: Fix warning about unused suppress_message_printing
      Merge branch 'for-4.19-nmi' into for-linus

Thierry Escande (1):
      lib/test_printf.c: accept "ptrval" as valid result for plain 'p' tests

 include/linux/printk.h      |  10 ++-
 kernel/printk/internal.h    |   9 ++-
 kernel/printk/printk.c      | 181 ++++++++++++++++++++++++--------------------
 kernel/printk/printk_safe.c |  58 +++++++++-----
 kernel/trace/trace.c        |   4 +-
 lib/Kconfig.debug           |  11 +++
 lib/nmi_backtrace.c         |   3 -
 lib/test_printf.c           |  24 +++++-
 lib/vsprintf.c              |   1 +
 9 files changed, 189 insertions(+), 112 deletions(-)