srcu: Add FORCE_NEED_SRCU_NMI_SAFE Kconfig for testing

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The srcu_read_lock_nmisafe() and srcu_read_unlock_nmisafe() functions
map to __srcu_read_lock() and __srcu_read_unlock() on systems like x86
that have NMI-safe this_cpu_inc() operations.  This makes the underlying
__srcu_read_lock_nmisafe() and __srcu_read_unlock_nmisafe() functions
difficult to test on (for example) x86 systems, allowing bugs to creep in.

This commit therefore creates a FORCE_NEED_SRCU_NMI_SAFE Kconfig that
forces those underlying functions to be used even on systems where they
are not needed, thus providing better testing coverage.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>

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Paul E. McKenney 2025-01-10 11:26:23 -08:00 • committed by Boqun Feng

parent 38b43eca66

commit 536e8b9b80

1 changed files with 11 additions and 0 deletions

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kernel/rcu/Kconfig

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