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[146.241.253.3]) by smtp.gmail.com with ESMTPSA id rd7-20020a170907a28700b00a1f6c2c391dsm13335131ejc.121.2023.12.17.23.48.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 Dec 2023 23:48:57 -0800 (PST) Message-ID: <9d4e1a18e6402f5476ebaaafd4a40a925daf19e6.camel@redhat.com> Subject: Re: [PATCH net-next 03/24] net: Use __napi_alloc_frag_align() instead of open coding it. From: Paolo Abeni To: Sebastian Andrzej Siewior , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Cc: "David S. Miller" , Boqun Feng , Daniel Borkmann , Eric Dumazet , Frederic Weisbecker , Ingo Molnar , Jakub Kicinski , Peter Zijlstra , Thomas Gleixner , Waiman Long , Will Deacon Date: Mon, 18 Dec 2023 08:48:56 +0100 In-Reply-To: <20231215171020.687342-4-bigeasy@linutronix.de> References: <20231215171020.687342-1-bigeasy@linutronix.de> <20231215171020.687342-4-bigeasy@linutronix.de> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.46.4 (3.46.4-1.fc37) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, 2023-12-15 at 18:07 +0100, Sebastian Andrzej Siewior wrote: > The else condition within __netdev_alloc_frag_align() is an open coded > __napi_alloc_frag_align(). >=20 > Use __napi_alloc_frag_align() instead of open coding it. >=20 > Signed-off-by: Sebastian Andrzej Siewior > --- > net/core/skbuff.c | 5 +---- > 1 file changed, 1 insertion(+), 4 deletions(-) >=20 > diff --git a/net/core/skbuff.c b/net/core/skbuff.c > index b157efea5dea8..de9397e45718a 100644 > --- a/net/core/skbuff.c > +++ b/net/core/skbuff.c > @@ -311,11 +311,8 @@ void *__netdev_alloc_frag_align(unsigned int fragsz,= unsigned int align_mask) > =20 > data =3D page_frag_alloc_align(nc, fragsz, GFP_ATOMIC, align_mask); > } else { > - struct napi_alloc_cache *nc; > - > local_bh_disable(); > - nc =3D this_cpu_ptr(&napi_alloc_cache); > - data =3D page_frag_alloc_align(&nc->page, fragsz, GFP_ATOMIC, align_ma= sk); There is a: fragsz =3D SKB_DATA_ALIGN(fragsz); statement just before the enclosing 'if'. I would consider moving such assignment inside the 'then' branch - since __napi_alloc_frag_align() already include that. /P