[PATCH printk 0/1] alternate fix for nbcon_cpu_emergency_flush()

[John Ogness]

Hi Petr,

Currently in linux-next we have commit b955f0eead54 ("printk: nbcon:
Fix nbcon_cpu_emergency_flush() when preemptible"). But as you
pointed out [0], there is no need to disable preemption at all if
we only need to know if the current CPU is in emergency state.

Here is an alternative patch that correctly addresses the issue by
avoiding the migration checks.

Since the previous patch is not yet mainline, perhaps you want to
use this one instead in order to avoid a revert. Up to you.

John Ogness

[0] https://lore.kernel.org/lkml/Zn7b8g1HtuTIAwyi@xxxxxxxxxxxxxxx

John Ogness (1):
  printk: nbcon: do not require migration disabled for
    nbcon_get_cpu_emergency_nesting()

 kernel/printk/nbcon.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)


base-commit: c51cf7315db1392af58b909d1004133f6dbf0bf6
-- 
2.39.2