From: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
To: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "stable@dpdk.org" <stable@dpdk.org>, nd <nd@arm.com>,
Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH] rcu: avoid literal suffix warning in C++ mode
Date: Fri, 4 Sep 2020 06:27:46 +0000 [thread overview]
Message-ID: <DBAPR08MB5814895EF84B23F30A979447982D0@DBAPR08MB5814.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <20200831213811.21521-1-dmitry.kozliuk@gmail.com>
Hi Dmitry,
Thanks for the patch, few nits inline.
> -----Original Message-----
> From: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> Sent: Monday, August 31, 2020 4:38 PM
> To: dev@dpdk.org
> Cc: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>; stable@dpdk.org;
> Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
> Subject: [PATCH] rcu: avoid literal suffix warning in C++ mode
^^^ should be lib/rcu
>
> 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 +++++++-------
To be consistent, can you please do similar changes in rte_rcu_qsbr.c file?
> 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
next prev parent reply other threads:[~2020-09-04 6:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-31 21:38 Dmitry Kozlyuk
2020-09-04 6:27 ` Honnappa Nagarahalli [this message]
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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