kernel/smp: Make csdlock_debug= resettable

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It is currently possible to set the csdlock_debug_enabled static
branch, but not to reset it.  This is an issue when several different
entities supply kernel boot parameters and also for kernels built with
CONFIG_CSD_LOCK_WAIT_DEBUG_DEFAULT=y.

Therefore, make the csdlock_debug=0 kernel boot parameter turn off
debugging.  Last one wins!

Reported-by: Jes Sorensen <Jes.Sorensen@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20230321005516.50558-4-paulmck@kernel.org

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Paul E. McKenney 2023-03-20 17:55:16 -07:00 • committed by Peter Zijlstra

parent 6366d062e7

commit 203e435844

2 changed files with 15 additions and 9 deletions

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13

Documentation/admin-guide/kernel-parameters.txt

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11

kernel/smp.c

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