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From: Bruce Richardson <bruce.richardson@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: dev@dpdk.org, "Morten Brørup" <mb@smartsharesystems.com>
Subject: Re: [PATCH v2] build: force gcc to initialize padding bits
Date: Mon, 27 Jan 2025 14:35:05 +0000	[thread overview]
Message-ID: <Z5eZmagxMwNhO8Ya@bricha3-mobl1.ger.corp.intel.com> (raw)
In-Reply-To: <20250124182647.117636-2-stephen@networkplumber.org>

On Fri, Jan 24, 2025 at 10:26:48AM -0800, Stephen Hemminger wrote:
> With GCC 15, the compiler has changed the default behavior when
> initialization is used for aggregate variables. The new default
> is to follow the standard (C23) and not initialize everything by
> default. This breaks assumptions in some drivers and can be
> lead to other bugs. Use the new zero initialization flag to
> force of all fields to zero.
> 
> Note: other compilers always initialize to zero in these cases.
> Only GCC seems to have decided to start initializing less as
> a silly attempt at optimization.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> Acked-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

  reply	other threads:[~2025-01-27 14:36 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-01-23 17:20 [PATCH] build: force gcc to initialize padding bits Stephen Hemminger
2025-01-24  7:48 ` Morten Brørup
2025-01-24  9:38   ` Bruce Richardson
2025-01-24 18:37     ` Stephen Hemminger
2025-01-27 14:34       ` Bruce Richardson
2025-01-24 18:26 ` [PATCH v2] " Stephen Hemminger
2025-01-27 14:35   ` Bruce Richardson [this message]
2025-02-11 11:06   ` David Marchand

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