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Mon, 18 Jun 2018 16:10:04 +0300 (EEST) From: Andy Shevchenko To: Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Shaohua Li , linux-raid@vger.kernel.org, Dmitry Torokhov , linux-input@vger.kernel.org, Andrew Morton , Yury Norov , linux-kernel@vger.kernel.org, mika.westerberg@linux.intel.com, Joe Perches Date: Mon, 18 Jun 2018 16:10:00 +0300 Message-Id: <20180618131003.88110-3-andriy.shevchenko@linux.intel.com> In-Reply-To: <20180618131003.88110-1-andriy.shevchenko@linux.intel.com> References: <20180618131003.88110-1-andriy.shevchenko@linux.intel.com> X-Greylist: Sender passed SPF test, Sender IP whitelisted by DNSRBL, ACL 207 matched, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Mon, 18 Jun 2018 13:10:07 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Mon, 18 Jun 2018 13:10:07 +0000 (UTC) for IP:'192.55.52.43' DOMAIN:'mga05.intel.com' HELO:'mga05.intel.com' FROM:'andriy.shevchenko@linux.intel.com' RCPT:'' X-RedHat-Spam-Score: -2.3 (RCVD_IN_DNSWL_MED) 192.55.52.43 mga05.intel.com 192.55.52.43 mga05.intel.com X-Scanned-By: MIMEDefang 2.83 on 10.5.110.25 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-loop: dm-devel@redhat.com X-Mailman-Approved-At: Tue, 19 Jun 2018 03:05:04 -0400 Cc: Andy Shevchenko Subject: [dm-devel] [PATCH v3 2/5] bitmap: Drop unnecessary 0 check for u32 array operations X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Tue, 19 Jun 2018 07:05:20 +0000 (UTC) X-Virus-Scanned: ClamAV using ClamSMTP The nbits == 0 is safe to be supplied to the function body, so, remove unnecessary checks in bitmap_to_arr32() and bitmap_from_arr32(). Acked-by: Yury Norov Signed-off-by: Andy Shevchenko --- lib/bitmap.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/lib/bitmap.c b/lib/bitmap.c index 58f9750e49c6..33e95cd359a2 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -1132,14 +1132,10 @@ EXPORT_SYMBOL(bitmap_copy_le); * @buf: array of u32 (in host byte order), the source bitmap * @nbits: number of bits in @bitmap */ -void bitmap_from_arr32(unsigned long *bitmap, const u32 *buf, - unsigned int nbits) +void bitmap_from_arr32(unsigned long *bitmap, const u32 *buf, unsigned int nbits) { unsigned int i, halfwords; - if (!nbits) - return; - halfwords = DIV_ROUND_UP(nbits, 32); for (i = 0; i < halfwords; i++) { bitmap[i/2] = (unsigned long) buf[i]; @@ -1163,9 +1159,6 @@ void bitmap_to_arr32(u32 *buf, const unsigned long *bitmap, unsigned int nbits) { unsigned int i, halfwords; - if (!nbits) - return; - halfwords = DIV_ROUND_UP(nbits, 32); for (i = 0; i < halfwords; i++) { buf[i] = (u32) (bitmap[i/2] & UINT_MAX);