[PATCH] rcu: remove VLAs
David Marchand
david.marchand at redhat.com
Thu Apr 10 13:39:42 CEST 2025
On Fri, Mar 7, 2025 at 2:40 AM Andre Muezerie
<andremue at linux.microsoft.com> wrote:
>
> There are two lines that were using VLAs, which are not supported by
> MSVC.
>
> 1)
> ../lib/rcu/rte_rcu_qsbr.c:326:12: warning: variable length array used [-Wvla]
> 326 | char data[dq->esize];
> | ^~~~~~~~~
> 2)
> ../lib/rcu/rte_rcu_qsbr.c:389:12: warning: variable length array used [-Wvla]
> 389 | char data[dq->esize];
> | ^~~~~~~~~
>
> The short-term fix is to use alloca, to allow progress with the msvc
> compatibility work.
> The long-term plan involves API changes and therefore can only be applied
> with a new release. This long-term plan consists of introducing some
> reasonable limitation on RCU DQ element size.
>
> Signed-off-by: Andre Muezerie <andremue at linux.microsoft.com>
Honnappa, any objection?
--
David Marchand
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