linux-kernel - [PATCH 04/16] lib/test_bitmap: test test_bitmap

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Message-Id: <20220718192844.1805158-5-yury.norov@gmail.com>
Date:   Mon, 18 Jul 2022 12:28:32 -0700
From:   Yury Norov <yury.norov@...il.com>
To:     linux-kernel@...r.kernel.org,
        Alexander Lobakin <alexandr.lobakin@...el.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Alexey Klimov <aklimov@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Ben Segall <bsegall@...gle.com>,
        Christoph Lameter <cl@...ux.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Dennis Zhou <dennis@...nel.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Eric Dumazet <edumazet@...gle.com>,
        Frederic Weisbecker <fweisbec@...il.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Ingo Molnar <mingo@...hat.com>,
        Isabella Basso <isabbasso@...eup.net>,
        John Fastabend <john.fastabend@...il.com>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Juergen Gross <jgross@...e.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        KP Singh <kpsingh@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Martin KaFai Lau <kafai@...com>,
        Mel Gorman <mgorman@...e.de>, Miroslav Benes <mbenes@...e.cz>,
        Nathan Chancellor <nathan@...nel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Song Liu <songliubraving@...com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tejun Heo <tj@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Valentin Schneider <vschneid@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Vlastimil Babka <vbabka@...e.cz>, Yonghong Song <yhs@...com>,
        Yury Norov <yury.norov@...il.com>, linux-mm@...ck.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: [PATCH 04/16] lib/test_bitmap: test test_bitmap_arr{32,64} starting from nbits == 1

nbits == 0 is useless. In a real code it's most probably a sign of
error, and it makes CONFIG_DEBUG_BITMAP barking.

Signed-off-by: Yury Norov <yury.norov@...il.com>
---
 lib/test_bitmap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 2a70393ac011..bc48d992d10d 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -567,7 +567,7 @@ static void __init test_bitmap_arr32(void)
 
 	memset(arr, 0xa5, sizeof(arr));
 
-	for (nbits = 0; nbits < EXP1_IN_BITS; ++nbits) {
+	for (nbits = 1; nbits < EXP1_IN_BITS; ++nbits) {
 		bitmap_to_arr32(arr, exp1, nbits);
 		bitmap_from_arr32(bmap2, arr, nbits);
 		expect_eq_bitmap(bmap2, exp1, nbits);
@@ -593,7 +593,7 @@ static void __init test_bitmap_arr64(void)
 
 	memset(arr, 0xa5, sizeof(arr));
 
-	for (nbits = 0; nbits < EXP1_IN_BITS; ++nbits) {
+	for (nbits = 1; nbits < EXP1_IN_BITS; ++nbits) {
 		memset(bmap2, 0xff, sizeof(arr));
 		bitmap_to_arr64(arr, exp1, nbits);
 		bitmap_from_arr64(bmap2, arr, nbits);
-- 
2.34.1