srcu: Make Tiny SRCU able to operate in preemptible kernels

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Given that SRCU allows its read-side critical sections are not just
preemptible, but also allow general blocking, there is not much
reason to restrict Tiny SRCU to non-preemptible kernels.  This commit
therefore removes Tiny SRCU dependencies on non-preemptibility, primarily
surrounding its interaction with rcutorture and early boot.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Ankur Arora <ankur.a.arora@oracle.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: <bpf@vger.kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>

...

This commit is contained in:

Paul E. McKenney 2024-06-17 08:43:02 -07:00 • committed by Boqun Feng

parent 2014c95afe

commit da2ac56237

2 changed files with 12 additions and 3 deletions

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9

kernel/rcu/rcu.h

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6

kernel/rcu/srcutiny.c

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