[PATCH next v1 0/3] printk: remove safe buffers

[John Ogness]

Hello,

Here is v1 of a series to remove the safe buffers. They are no
longer needed because messages can be stored directly into the
log buffer from any context.

However, the safe buffers also provided a form of recursion
protection. For that reason, explicit recursion protection is
also implemented for this series.

This series falls in line with the printk-rework plan as
presented [0] at Linux Plumbers in Lisbon 2019.

This series is based on next-20210316.

John Ogness

[0] https://linuxplumbersconf.org/event/4/contributions/290/attachments/276/463/lpc2019_jogness_printk.pdf (slide 23)

John Ogness (3):
  printk: track/limit recursion
  printk: remove safe buffers
  printk: convert @syslog_lock to spin_lock

 arch/powerpc/kernel/traps.c    |   1 -
 arch/powerpc/kernel/watchdog.c |   5 -
 include/linux/printk.h         |  10 -
 kernel/kexec_core.c            |   1 -
 kernel/panic.c                 |   3 -
 kernel/printk/internal.h       |   2 -
 kernel/printk/printk.c         | 171 +++++++++--------
 kernel/printk/printk_safe.c    | 332 +--------------------------------
 lib/nmi_backtrace.c            |   6 -
 9 files changed, 100 insertions(+), 431 deletions(-)

-- 
2.20.1