From: Stephen Hemminger <stephen@networkplumber.org>
To: Daniel Gregory <daniel.gregory@bytedance.com>
Cc: Ruifeng Wang <ruifeng.wang@arm.com>,
dev@dpdk.org, Punit Agrawal <punit.agrawal@bytedance.com>,
Liang Ma <liangma@bytedance.com>,
feifei.wang2@arm.com
Subject: Re: [PATCH v2] eal/arm: replace RTE_BUILD_BUG on non-constant
Date: Fri, 4 Oct 2024 10:47:06 -0700 [thread overview]
Message-ID: <20241004104706.35a8ebf0@hermes.local> (raw)
In-Reply-To: <20240503182730.31693-1-daniel.gregory@bytedance.com>
On Fri, 3 May 2024 19:27:30 +0100
Daniel Gregory <daniel.gregory@bytedance.com> wrote:
> The ARM implementation of rte_pause uses RTE_BUILD_BUG_ON to check
> memorder, which is not constant. This causes compile errors when it is
> enabled with RTE_ARM_USE_WFE. eg.
>
> ../lib/eal/arm/include/rte_pause_64.h: In function ‘rte_wait_until_equal_16’:
> ../lib/eal/include/rte_common.h:530:56: error: expression in static assertion is not constant
> 530 | #define RTE_BUILD_BUG_ON(condition) do { static_assert(!(condition), #condition); } while (0)
> | ^~~~~~~~~~~~
> ../lib/eal/arm/include/rte_pause_64.h:156:9: note: in expansion of macro ‘RTE_BUILD_BUG_ON’
> 156 | RTE_BUILD_BUG_ON(memorder != rte_memory_order_acquire &&
> | ^~~~~~~~~~~~~~~~
>
> Fix the compile errors by replacing the check with an assert, like in
> the generic implementation (lib/eal/include/generic/rte_pause.h).
>
> Fixes: 875f350924b8 ("eal: add a new helper for wait until scheme")
>
> Signed-off-by: Daniel Gregory <daniel.gregory@bytedance.com>
> ---
> Cc: feifei.wang2@arm.com
> ---
> lib/eal/arm/include/rte_pause_64.h | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/lib/eal/arm/include/rte_pause_64.h b/lib/eal/arm/include/rte_pause_64.h
> index 5cb8b59056..852660091a 100644
> --- a/lib/eal/arm/include/rte_pause_64.h
> +++ b/lib/eal/arm/include/rte_pause_64.h
> @@ -10,6 +10,8 @@
> extern "C" {
> #endif
>
> +#include <assert.h>
> +
> #include <rte_common.h>
>
> #ifdef RTE_ARM_USE_WFE
> @@ -153,7 +155,7 @@ rte_wait_until_equal_16(volatile uint16_t *addr, uint16_t expected,
> {
> uint16_t value;
>
> - RTE_BUILD_BUG_ON(memorder != rte_memory_order_acquire &&
> + assert(memorder != rte_memory_order_acquire &&
> memorder != rte_memory_order_relaxed);
>
Why not change RET_BUILD_BUG_ON() to RTE_ASSERT()?
The one issue is that by default RTE_ENABLE_ASSERT is not enabled.
next prev parent reply other threads:[~2024-10-04 17:47 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-02 14:21 [PATCH] " Daniel Gregory
2024-05-02 16:20 ` Stephen Hemminger
2024-05-02 17:44 ` Daniel Gregory
2024-05-02 18:27 ` Stephen Hemminger
2024-05-02 21:48 ` Stephen Hemminger
2024-05-03 9:46 ` Daniel Gregory
2024-05-04 0:56 ` Stephen Hemminger
2024-05-09 11:02 ` Daniel Gregory
2024-05-03 13:32 ` David Marchand
2024-05-03 14:21 ` Daniel Gregory
2024-05-03 18:27 ` [PATCH v2] " Daniel Gregory
2024-05-03 18:30 ` Daniel Gregory
2024-05-04 0:59 ` Stephen Hemminger
2024-06-27 15:08 ` Thomas Monjalon
2024-06-28 10:05 ` Daniel Gregory
2024-06-28 15:19 ` Stephen Hemminger
2024-05-06 9:30 ` Ruifeng Wang
2024-05-11 17:00 ` Wathsala Wathawana Vithanage
2024-10-04 17:47 ` Stephen Hemminger [this message]
2024-05-04 1:02 ` [PATCH] " Stephen Hemminger
2024-05-09 11:11 ` Daniel Gregory
2024-05-09 16:47 ` Tyler Retzlaff
2024-05-11 16:48 ` Wathsala Wathawana Vithanage
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