[tip: locking/core] kcsan: Fix printk format string

[tip-bot2 for Arnd Bergmann]

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     f4abe9967c6fdb511ee567e129a014b60945ab93
Gitweb:        https://git.kernel.org/tip/f4abe9967c6fdb511ee567e129a014b60945ab93
Author:        Arnd Bergmann <arnd@xxxxxxxx>
AuthorDate:    Wed, 21 Apr 2021 15:50:38 +02:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Thu, 22 Apr 2021 14:36:03 +02:00

kcsan: Fix printk format string

Printing a 'long' variable using the '%d' format string is wrong
and causes a warning from gcc:

kernel/kcsan/kcsan_test.c: In function 'nthreads_gen_params':
include/linux/kern_levels.h:5:25: error: format '%d' expects argument of type 'int', but argument 3 has type 'long int' [-Werror=format=]

Use the appropriate format modifier.

Fixes: f6a149140321 ("kcsan: Switch to KUNIT_CASE_PARAM for parameterized tests")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Acked-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20210421135059.3371701-1-arnd@xxxxxxxxxx
---
 kernel/kcsan/kcsan_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c
index b71751f..8bcffbd 100644
--- a/kernel/kcsan/kcsan_test.c
+++ b/kernel/kcsan/kcsan_test.c
@@ -984,7 +984,7 @@ static const void *nthreads_gen_params(const void *prev, char *desc)
 		const long min_required_cpus = 2 + min_unused_cpus;
 
 		if (num_online_cpus() < min_required_cpus) {
-			pr_err_once("Too few online CPUs (%u < %d) for test\n",
+			pr_err_once("Too few online CPUs (%u < %ld) for test\n",
 				    num_online_cpus(), min_required_cpus);
 			nthreads = 0;
 		} else if (nthreads >= num_online_cpus() - min_unused_cpus) {