linux-kernel - Re: [PATCH] selinux: Remove redundant __GFP

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Message-ID: <CAEjxPJ7j_cKGygKBbiEzAruFXEiUyToSHWopjLEKgJFq6UrYEA@mail.gmail.com>
Date: Mon, 11 Aug 2025 10:11:37 -0400
From: Stephen Smalley <stephen.smalley.work@...il.com>
To: Qianfeng Rong <rongqianfeng@...o.com>
Cc: Paul Moore <paul@...l-moore.com>, Ondrej Mosnacek <omosnace@...hat.com>, selinux@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] selinux: Remove redundant __GFP_NOWARN

On Thu, Aug 7, 2025 at 10:06 AM Qianfeng Rong <rongqianfeng@...o.com> wrote:
>
> Commit 16f5dfbc851b ("gfp: include __GFP_NOWARN in GFP_NOWAIT")
> made GFP_NOWAIT implicitly include __GFP_NOWARN.
>
> Therefore, explicit __GFP_NOWARN combined with GFP_NOWAIT
> (e.g., `GFP_NOWAIT | __GFP_NOWARN`) is now redundant. Let's clean
> up these redundant flags across subsystems.
>
> No functional changes.
>
> Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>

Acked-by: Stephen Smalley <stephen.smalley.work@...il.com>

> ---
>  security/selinux/avc.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/security/selinux/avc.c b/security/selinux/avc.c
> index 4b4837a20225..c70053f2806e 100644
> --- a/security/selinux/avc.c
> +++ b/security/selinux/avc.c
> @@ -293,26 +293,26 @@ static struct avc_xperms_decision_node
>         struct extended_perms_decision *xpd;
>
>         xpd_node = kmem_cache_zalloc(avc_xperms_decision_cachep,
> -                                    GFP_NOWAIT | __GFP_NOWARN);
> +                                    GFP_NOWAIT);
>         if (!xpd_node)
>                 return NULL;
>
>         xpd = &xpd_node->xpd;
>         if (which & XPERMS_ALLOWED) {
>                 xpd->allowed = kmem_cache_zalloc(avc_xperms_data_cachep,
> -                                               GFP_NOWAIT | __GFP_NOWARN);
> +                                               GFP_NOWAIT);
>                 if (!xpd->allowed)
>                         goto error;
>         }
>         if (which & XPERMS_AUDITALLOW) {
>                 xpd->auditallow = kmem_cache_zalloc(avc_xperms_data_cachep,
> -                                               GFP_NOWAIT | __GFP_NOWARN);
> +                                               GFP_NOWAIT);
>                 if (!xpd->auditallow)
>                         goto error;
>         }
>         if (which & XPERMS_DONTAUDIT) {
>                 xpd->dontaudit = kmem_cache_zalloc(avc_xperms_data_cachep,
> -                                               GFP_NOWAIT | __GFP_NOWARN);
> +                                               GFP_NOWAIT);
>                 if (!xpd->dontaudit)
>                         goto error;
>         }
> @@ -340,7 +340,7 @@ static struct avc_xperms_node *avc_xperms_alloc(void)
>  {
>         struct avc_xperms_node *xp_node;
>
> -       xp_node = kmem_cache_zalloc(avc_xperms_cachep, GFP_NOWAIT | __GFP_NOWARN);
> +       xp_node = kmem_cache_zalloc(avc_xperms_cachep, GFP_NOWAIT);
>         if (!xp_node)
>                 return xp_node;
>         INIT_LIST_HEAD(&xp_node->xpd_head);
> @@ -495,7 +495,7 @@ static struct avc_node *avc_alloc_node(void)
>  {
>         struct avc_node *node;
>
> -       node = kmem_cache_zalloc(avc_node_cachep, GFP_NOWAIT | __GFP_NOWARN);
> +       node = kmem_cache_zalloc(avc_node_cachep, GFP_NOWAIT);
>         if (!node)
>                 goto out;
>
> --
> 2.34.1
>