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From: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
To: dev@dpdk.org
Cc: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>,
	stable@dpdk.org,
	Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Subject: [dpdk-dev] [PATCH] rcu: avoid literal suffix warning in C++ mode
Date: Tue,  1 Sep 2020 00:38:11 +0300
Message-ID: <20200831213811.21521-1-dmitry.kozliuk@gmail.com> (raw)

Sequences like "value = %"PRIu64 (no space before PRIu64) are parsed as
a single preprocessor token, user-defined-string-literal, in C++11
onwards. While modern compilers are smart enough to parse this properly,
GCC 9.3.0 generates warnings like:

    rte_rcu_qsbr.h:555:26: warning: invalid suffix on literal; C++11
    requires a space between literal and string macro [-Wliteral-suffix]

Add spaces around format specifier macros to make public headers
compatible with C++ without causing warnings.

Fixes: 64994b56c ("rcu: add RCU library supporting QSBR mechanism")
Cc: stable@dpdk.org

Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
---
 lib/librte_rcu/rte_rcu_qsbr.h | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/lib/librte_rcu/rte_rcu_qsbr.h b/lib/librte_rcu/rte_rcu_qsbr.h
index a98e8f0f8..aa237cf75 100644
--- a/lib/librte_rcu/rte_rcu_qsbr.h
+++ b/lib/librte_rcu/rte_rcu_qsbr.h
@@ -552,7 +552,7 @@ rte_rcu_qsbr_quiescent(struct rte_rcu_qsbr *v, unsigned int thread_id)
 		__atomic_store_n(&v->qsbr_cnt[thread_id].cnt,
 					 t, __ATOMIC_RELEASE);
 
-	__RTE_RCU_DP_LOG(DEBUG, "%s: update: token = %"PRIu64", Thread ID = %d",
+	__RTE_RCU_DP_LOG(DEBUG, "%s: update: token = %" PRIu64 ", Thread ID = %d",
 		__func__, t, thread_id);
 }
 
@@ -580,13 +580,13 @@ __rte_rcu_qsbr_check_selective(struct rte_rcu_qsbr *v, uint64_t t, bool wait)
 		while (bmap) {
 			j = __builtin_ctzl(bmap);
 			__RTE_RCU_DP_LOG(DEBUG,
-				"%s: check: token = %"PRIu64", wait = %d, Bit Map = 0x%"PRIx64", Thread ID = %d",
+				"%s: check: token = %" PRIu64 ", wait = %d, Bit Map = 0x%" PRIx64 ", Thread ID = %d",
 				__func__, t, wait, bmap, id + j);
 			c = __atomic_load_n(
 					&v->qsbr_cnt[id + j].cnt,
 					__ATOMIC_ACQUIRE);
 			__RTE_RCU_DP_LOG(DEBUG,
-				"%s: status: token = %"PRIu64", wait = %d, Thread QS cnt = %"PRIu64", Thread ID = %d",
+				"%s: status: token = %" PRIu64 ", wait = %d, Thread QS cnt = %" PRIu64 ", Thread ID = %d",
 				__func__, t, wait, c, id+j);
 
 			/* Counter is not checked for wrap-around condition
@@ -643,12 +643,12 @@ __rte_rcu_qsbr_check_all(struct rte_rcu_qsbr *v, uint64_t t, bool wait)
 
 	for (i = 0, cnt = v->qsbr_cnt; i < v->max_threads; i++, cnt++) {
 		__RTE_RCU_DP_LOG(DEBUG,
-			"%s: check: token = %"PRIu64", wait = %d, Thread ID = %d",
+			"%s: check: token = %" PRIu64 ", wait = %d, Thread ID = %d",
 			__func__, t, wait, i);
 		while (1) {
 			c = __atomic_load_n(&cnt->cnt, __ATOMIC_ACQUIRE);
 			__RTE_RCU_DP_LOG(DEBUG,
-				"%s: status: token = %"PRIu64", wait = %d, Thread QS cnt = %"PRIu64", Thread ID = %d",
+				"%s: status: token = %" PRIu64 ", wait = %d, Thread QS cnt = %" PRIu64 ", Thread ID = %d",
 				__func__, t, wait, c, i);
 
 			/* Counter is not checked for wrap-around condition
@@ -725,10 +725,10 @@ rte_rcu_qsbr_check(struct rte_rcu_qsbr *v, uint64_t t, bool wait)
 	/* Check if all the readers have already acknowledged this token */
 	if (likely(t <= v->acked_token)) {
 		__RTE_RCU_DP_LOG(DEBUG,
-			"%s: check: token = %"PRIu64", wait = %d",
+			"%s: check: token = %" PRIu64 ", wait = %d",
 			__func__, t, wait);
 		__RTE_RCU_DP_LOG(DEBUG,
-			"%s: status: least acked token = %"PRIu64"",
+			"%s: status: least acked token = %" PRIu64,
 			__func__, v->acked_token);
 		return 1;
 	}
-- 
2.25.4


             reply	other threads:[~2020-08-31 21:38 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-31 21:38 Dmitry Kozlyuk [this message]
2020-09-04  6:27 ` Honnappa Nagarahalli
2020-09-04 20:47 ` [dpdk-dev] [PATCH v2] lib/rcu: " Dmitry Kozlyuk
2020-09-05  1:47   ` Honnappa Nagarahalli
2020-10-05 22:47     ` Thomas Monjalon

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