[PATCH printk v3 0/7] various cleanups

[John Ogness]

Hi,

This is v3 of a series providing some cleanup in preparation
for the threaded/atomic console work. v2 is here [0]. This
series provides useful cleanups independent of the
threaded/atomic work.

Changes since v2:

- "NMI safety" patch split into 3 patches: console_unblank,
  keep non-panic CPUs out, do not lock console on panic flush.

- console_unblank() aborts if there are no consoles implementing
  an unblank() callback. This check is performed before taking
  the console lock.

- Commit messages and comments updated to mention the details
  discussed in the v2 feedback.

John Ogness

[0] https://lore.kernel.org/lkml/20230710134524.25232-1-john.ogness@xxxxxxxxxxxxx

John Ogness (7):
  kdb: Do not assume write() callback available
  printk: Reduce console_unblank() usage in unsafe scenarios
  printk: Keep non-panic-CPUs out of console lock
  printk: Do not take console lock for console_flush_on_panic()
  printk: Consolidate console deferred printing
  printk: Add per-console suspended state
  printk: Rename abandon_console_lock_in_panic() to other_cpu_in_panic()

 include/linux/console.h     |   3 +
 kernel/debug/kdb/kdb_io.c   |   2 +
 kernel/printk/internal.h    |   2 +
 kernel/printk/printk.c      | 213 +++++++++++++++++++++++++-----------
 kernel/printk/printk_safe.c |   9 +-
 5 files changed, 156 insertions(+), 73 deletions(-)


base-commit: 7ec85f3e089aa423a69559bf4555b6218b5a2ef7
-- 
2.30.2