tree 8ca18f66e25e65833db18c6b3425f6d4b8daa677
parent e675d2533a74acfa95c62e7bb088335866f44fd2
author Marco Elver <elver@google.com> 1623070610 +0200
committer Paul E. McKenney <paulmck@kernel.org> 1626814183 -0700

kcsan: Reduce get_ctx() uses in kcsan_found_watchpoint()

There are a number get_ctx() calls that are close to each other, which
results in poor codegen (repeated preempt_count loads).

Specifically in kcsan_found_watchpoint() (even though it's a slow-path)
it is beneficial to keep the race-window small until the watchpoint has
actually been consumed to avoid missed opportunities to report a race.

Let's clean it up a bit before we add more code in
kcsan_found_watchpoint().

Signed-off-by: Marco Elver <elver@google.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>