From: Valentin Schneider <valentin.schneider@arm.com>
To: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
linuxppc-dev@lists.ozlabs.org, linux-kbuild@vger.kernel.org
Cc: Marco Elver <elver@google.com>,
Michal Marek <michal.lkml@markovi.net>,
Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <frederic@kernel.org>,
Mike Galbraith <efault@gmx.de>,
Nick Desaulniers <ndesaulniers@google.com>,
Steven Rostedt <rostedt@goodmis.org>,
Paul Mackerras <paulus@samba.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Ingo Molnar <mingo@kernel.org>,
Dmitry Vyukov <dvyukov@google.com>
Subject: [PATCH v2 4/5] kscan: Use preemption model accessors
Date: Wed, 10 Nov 2021 20:24:47 +0000 [thread overview]
Message-ID: <20211110202448.4054153-5-valentin.schneider@arm.com> (raw)
In-Reply-To: <20211110202448.4054153-1-valentin.schneider@arm.com>
Per PREEMPT_DYNAMIC, checking CONFIG_PREEMPT doesn't tell you the actual
preemption model of the live kernel. Use the newly-introduced accessors
instead.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
---
kernel/kcsan/kcsan_test.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c
index dc55fd5a36fc..14d811eb9a21 100644
--- a/kernel/kcsan/kcsan_test.c
+++ b/kernel/kcsan/kcsan_test.c
@@ -1005,13 +1005,13 @@ static const void *nthreads_gen_params(const void *prev, char *desc)
else
nthreads *= 2;
- if (!IS_ENABLED(CONFIG_PREEMPT) || !IS_ENABLED(CONFIG_KCSAN_INTERRUPT_WATCHER)) {
+ if (!is_preempt_full() || !IS_ENABLED(CONFIG_KCSAN_INTERRUPT_WATCHER)) {
/*
* Without any preemption, keep 2 CPUs free for other tasks, one
* of which is the main test case function checking for
* completion or failure.
*/
- const long min_unused_cpus = IS_ENABLED(CONFIG_PREEMPT_NONE) ? 2 : 0;
+ const long min_unused_cpus = is_preempt_none() ? 2 : 0;
const long min_required_cpus = 2 + min_unused_cpus;
if (num_online_cpus() < min_required_cpus) {
--
2.25.1
next prev parent reply other threads:[~2021-11-10 20:27 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-10 20:24 [PATCH v2 0/5] preempt: PREEMPT vs PREEMPT_DYNAMIC configs fixup Valentin Schneider
2021-11-10 20:24 ` [PATCH v2 1/5] preempt: Restore preemption model selection configs Valentin Schneider
2021-11-11 8:58 ` Marco Elver
2021-11-10 20:24 ` [PATCH v2 2/5] preempt/dynamic: Introduce preempt mode accessors Valentin Schneider
2021-11-11 3:16 ` Mike Galbraith
2021-11-11 3:35 ` Mike Galbraith
2021-11-11 3:47 ` Mike Galbraith
2021-11-11 3:55 ` Mike Galbraith
2021-11-11 9:36 ` Marco Elver
2021-11-11 10:32 ` Mike Galbraith
2021-11-11 10:56 ` Valentin Schneider
2021-11-11 11:09 ` Mike Galbraith
2021-11-11 8:54 ` Marco Elver
2021-11-11 10:56 ` Valentin Schneider
2021-11-16 13:29 ` Christophe Leroy
2021-11-22 16:37 ` Valentin Schneider
2021-11-10 20:24 ` [PATCH v2 3/5] powerpc: Use preemption model accessors Valentin Schneider
2021-11-11 4:55 ` Michael Ellerman
2021-11-15 15:29 ` Valentin Schneider
2021-11-16 13:41 ` Christophe Leroy
2021-11-22 16:44 ` Valentin Schneider
2021-11-10 20:24 ` Valentin Schneider [this message]
2021-11-11 9:11 ` [PATCH v2 4/5] kscan: " Marco Elver
2021-11-11 9:39 ` Marco Elver
2021-11-11 10:57 ` Valentin Schneider
2021-11-10 20:24 ` [PATCH v2 5/5] ftrace: Use preemption model accessors for trace header printout Valentin Schneider
2021-11-10 20:36 ` Steven Rostedt
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