[PATCH 29/34] net: smc: fix opencoded find_and_set_bit() in smc_wr_tx_get_free_slot_index()

From: Yury Norov <yury.norov@gmail.com>
To: linux-kernel@vger.kernel.org,
	Karsten Graul <kgraul@linux.ibm.com>,
	Wenjia Zhang <wenjia@linux.ibm.com>,
	Jan Karcher <jaka@linux.ibm.com>,
	"D. Wythe" <alibuda@linux.alibaba.com>,
	Tony Lu <tonylu@linux.alibaba.com>,
	Wen Gu <guwen@linux.alibaba.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	linux-s390@vger.kernel.org, netdev@vger.kernel.org
Cc: Yury Norov <yury.norov@gmail.com>, Jan Kara <jack@suse.cz>,
	Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>,
	Matthew Wilcox <willy@infradead.org>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>,
	Alexey Klimov <klimov.linux@gmail.com>
Subject: [PATCH 29/34] net: smc: fix opencoded find_and_set_bit() in smc_wr_tx_get_free_slot_index()
Date: Sat, 18 Nov 2023 07:51:00 -0800	[thread overview]
Message-ID: <20231118155105.25678-30-yury.norov@gmail.com> (raw)
In-Reply-To: <20231118155105.25678-1-yury.norov@gmail.com>

The function opencodes find_and_set_bit() with a for_each() loop. Fix
it, and make the whole function a simple almost one-liner.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
 net/smc/smc_wr.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/net/smc/smc_wr.c b/net/smc/smc_wr.c
index 0021065a600a..b6f0cfc52788 100644
--- a/net/smc/smc_wr.c
+++ b/net/smc/smc_wr.c
@@ -170,15 +170,11 @@ void smc_wr_tx_cq_handler(struct ib_cq *ib_cq, void *cq_context)
 
 static inline int smc_wr_tx_get_free_slot_index(struct smc_link *link, u32 *idx)
 {
-	*idx = link->wr_tx_cnt;
 	if (!smc_link_sendable(link))
 		return -ENOLINK;
-	for_each_clear_bit(*idx, link->wr_tx_mask, link->wr_tx_cnt) {
-		if (!test_and_set_bit(*idx, link->wr_tx_mask))
-			return 0;
-	}
-	*idx = link->wr_tx_cnt;
-	return -EBUSY;
+
+	*idx = find_and_set_bit(link->wr_tx_mask, link->wr_tx_cnt);
+	return *idx < link->wr_tx_cnt ? 0 : -EBUSY;
 }
 
 /**
-- 
2.39.2

