linux-kernel - [PATCH v2 2/2] selftests/net: replace ternary operator with min()/max()

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Message-Id: <20230824202415.131824-2-mahmoudmatook.mm@gmail.com>
Date:   Fri, 25 Aug 2023 00:24:15 +0400
From:   Mahmoud Maatuq <mahmoudmatook.mm@...il.com>
To:     keescook@...omium.org, edumazet@...gle.com,
        willemdebruijn.kernel@...il.com, wad@...omium.org,
        luto@...capital.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kuba@...nel.org, shuah@...nel.org,
        pabeni@...hat.com, linux-kselftest@...r.kernel.org,
        davem@...emloft.net
Cc:     linux-kernel-mentees@...ts.linuxfoundation.org,
        Mahmoud Maatuq <mahmoudmatook.mm@...il.com>
Subject: [PATCH v2 2/2] selftests/net: replace ternary operator with min()/max()

Fix the following coccicheck warning:
tools/testing/selftests/net/udpgso_bench_tx.c:297:18-19: WARNING opportunity for min()
tools/testing/selftests/net/udpgso_bench_tx.c:354:27-28: WARNING opportunity for min()
tools/testing/selftests/net/so_txtime.c:129:24-26: WARNING opportunity for max()
tools/testing/selftests/net/so_txtime.c:96:30-31: WARNING opportunity for max()

Signed-off-by: Mahmoud Maatuq <mahmoudmatook.mm@...il.com>
Suggested-by: Willem de Bruijn <willemdebruijn.kernel@...il.com>
---
changes in v2:
cast var cfg_mss to int to avoid static assertion
after providing a stricter version of min() that does signedness checking.
---
 tools/testing/selftests/net/Makefile          | 2 ++
 tools/testing/selftests/net/so_txtime.c       | 7 ++++---
 tools/testing/selftests/net/udpgso_bench_tx.c | 6 +++---
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index 7f3ab2a93ed6..a06cc25489f9 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -3,6 +3,8 @@
 
 CFLAGS =  -Wall -Wl,--no-as-needed -O2 -g
 CFLAGS += -I../../../../usr/include/ $(KHDR_INCLUDES)
+# Additional include paths needed by kselftest.h
+CFLAGS += -I../
 
 TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh \
 	      rtnetlink.sh xfrm_policy.sh test_blackhole_dev.sh
diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
index 2672ac0b6d1f..2936174e7de4 100644
--- a/tools/testing/selftests/net/so_txtime.c
+++ b/tools/testing/selftests/net/so_txtime.c
@@ -33,6 +33,8 @@
 #include <unistd.h>
 #include <poll.h>
 
+#include "kselftest.h"
+
 static int	cfg_clockid	= CLOCK_TAI;
 static uint16_t	cfg_port	= 8000;
 static int	cfg_variance_us	= 4000;
@@ -93,8 +95,7 @@ static void do_send_one(int fdt, struct timed_send *ts)
 		msg.msg_controllen = sizeof(control);
 
 		tdeliver = glob_tstart + ts->delay_us * 1000;
-		tdeliver_max = tdeliver_max > tdeliver ?
-			       tdeliver_max : tdeliver;
+		tdeliver_max = max(tdeliver_max, tdeliver);
 
 		cm = CMSG_FIRSTHDR(&msg);
 		cm->cmsg_level = SOL_SOCKET;
@@ -126,7 +127,7 @@ static void do_recv_one(int fdr, struct timed_send *ts)
 		error(1, 0, "read: %dB", ret);
 
 	tstop = (gettime_ns(cfg_clockid) - glob_tstart) / 1000;
-	texpect = ts->delay_us >= 0 ? ts->delay_us : 0;
+	texpect = max(ts->delay_us, 0);
 
 	fprintf(stderr, "payload:%c delay:%lld expected:%lld (us)\n",
 			rbuf[0], (long long)tstop, (long long)texpect);
diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
index 477392715a9a..6bd32a312901 100644
--- a/tools/testing/selftests/net/udpgso_bench_tx.c
+++ b/tools/testing/selftests/net/udpgso_bench_tx.c
@@ -25,7 +25,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include "../kselftest.h"
+#include "kselftest.h"
 
 #ifndef ETH_MAX_MTU
 #define ETH_MAX_MTU 0xFFFFU
@@ -294,7 +294,7 @@ static int send_udp(int fd, char *data)
 	total_len = cfg_payload_len;
 
 	while (total_len) {
-		len = total_len < cfg_mss ? total_len : cfg_mss;
+		len = min(total_len, (int)cfg_mss);
 
 		ret = sendto(fd, data, len, cfg_zerocopy ? MSG_ZEROCOPY : 0,
 			     cfg_connected ? NULL : (void *)&cfg_dst_addr,
@@ -351,7 +351,7 @@ static int send_udp_sendmmsg(int fd, char *data)
 			error(1, 0, "sendmmsg: exceeds max_nr_msg");
 
 		iov[i].iov_base = data + off;
-		iov[i].iov_len = cfg_mss < left ? cfg_mss : left;
+		iov[i].iov_len = min(cfg_mss, left);
 
 		mmsgs[i].msg_hdr.msg_iov = iov + i;
 		mmsgs[i].msg_hdr.msg_iovlen = 1;
-- 
2.34.1