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charset="utf-8" Avoid unnecessary nested min()/max() which reults in egregious macro expansion. Use clamp_t() as this introduces the least possible expansion. Not doing so results in an impact on build times. Cc: stable@vger.kernel.org Fixes: 867046cc7027 ("minmax: relax check to allow comparison between unsig= ned arguments and signed constants") Reviewed-by: Andrew Lunn Signed-off-by: Lorenzo Stoakes --- drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ether= net/marvell/mvpp2/mvpp2.h index e809f91c08fb..8b431f90efc3 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h @@ -23,7 +23,7 @@ /* The PacketOffset field is measured in units of 32 bytes and is 3 bits w= ide, * so the maximum offset is 7 * 32 =3D 224 */ -#define MVPP2_SKB_HEADROOM min(max(XDP_PACKET_HEADROOM, NET_SKB_PAD), 224) +#define MVPP2_SKB_HEADROOM clamp_t(int, XDP_PACKET_HEADROOM, NET_SKB_PAD, = 224) #define MVPP2_XDP_PASS 0 #define MVPP2_XDP_DROPPED BIT(0) -- 2.46.0 From nobody Sat Nov 30 04:30:01 2024 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7AB321B1D5F; 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Wed, 11 Sep 2024 17:51:22 +0000 From: Lorenzo Stoakes To: Andrew Morton Cc: Richard Narron , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Hans de Goede , Mauro Carvalho Chehab , Sakari Ailus , Greg Kroah-Hartman , Marcin Wojtas , Russell King , "David S . 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charset="utf-8" Avoid unnecessary nested min()/max() which reults in egregious macro expansion. The nesting occurs when NET_SKB_PAD is used in a min() or max() invocation, for instance, various ethernet drivers wrap it in a max(). Not doing so results in an impact on build times. Cc: stable@vger.kernel.org Fixes: 867046cc7027 ("minmax: relax check to allow comparison between unsig= ned arguments and signed constants") Signed-off-by: Lorenzo Stoakes --- include/linux/skbuff.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 29c3ea5b6e93..d53b296df504 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -3164,7 +3164,11 @@ static inline int pskb_network_may_pull(struct sk_bu= ff *skb, unsigned int len) * NET_IP_ALIGN(2) + ethernet_header(14) + IP_header(20/40) + ports(8) */ #ifndef NET_SKB_PAD -#define NET_SKB_PAD max(32, L1_CACHE_BYTES) +#if L1_CACHE_BYTES < 32 +#define NET_SKB_PAD 32 +#else +#define NET_SKB_PAD L1_CACHE_BYTES +#endif #endif int ___pskb_trim(struct sk_buff *skb, unsigned int len); -- 2.46.0 From nobody Sat Nov 30 04:30:01 2024 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 15C2B1B4C56; 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Wed, 11 Sep 2024 17:51:24 +0000 From: Lorenzo Stoakes To: Andrew Morton Cc: Richard Narron , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Hans de Goede , Mauro Carvalho Chehab , Sakari Ailus , Greg Kroah-Hartman , Marcin Wojtas , Russell King , "David S . Miller" , Arnd Bergmann , Linus Torvalds , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-staging@lists.linux.dev, linux-mm@kvack.org, Andrew Lunn , Dan Carpenter , stable@vger.kernel.org Subject: [PATCH hotfix 6.11 v2 3/3] minmax: reduce min/max macro expansion in atomisp driver Date: Wed, 11 Sep 2024 18:51:11 +0100 Message-ID: X-Mailer: git-send-email 2.46.0 In-Reply-To: References: Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: LO2P265CA0452.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:e::32) To SJ0PR10MB5613.namprd10.prod.outlook.com (2603:10b6:a03:3d0::5) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ0PR10MB5613:EE_|MN6PR10MB8046:EE_ X-MS-Office365-Filtering-Correlation-Id: 88680aaa-a288-42b2-8a72-08dcd28a5aae X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|366016|1800799024|376014; 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charset="utf-8" Avoid unnecessary nested min()/max() which results in egregious macro expansion. Use clamp_t() as this introduces the least possible expansion. Not doing so results in an impact on build times. This resolves an issue with slackware 15.0 32-bit compilation as reported by Richard Narron. Presumably the min/max fixups would be difficult to backport, this patch should be easier and fix's Richard's problem in 5.15. Reported-by: Richard Narron Closes: https://lore.kernel.org/all/4a5321bd-b1f-1832-f0c-cea8694dc5aa@aaaz= en.com/ Fixes: 867046cc7027 ("minmax: relax check to allow comparison between unsig= ned arguments and signed constants") Cc: stable@vger.kernel.org Signed-off-by: Lorenzo Stoakes Reviewed-by: Hans de Goede --- .../staging/media/atomisp/pci/sh_css_frac.h | 26 ++++++++++++++----- 1 file changed, 19 insertions(+), 7 deletions(-) diff --git a/drivers/staging/media/atomisp/pci/sh_css_frac.h b/drivers/stag= ing/media/atomisp/pci/sh_css_frac.h index b90b5b330dfa..8ba65161f7a9 100644 --- a/drivers/staging/media/atomisp/pci/sh_css_frac.h +++ b/drivers/staging/media/atomisp/pci/sh_css_frac.h @@ -32,12 +32,24 @@ #define uISP_VAL_MAX ((unsigned int)((1 << uISP_REG_BIT) - 1)) /* a:fraction bits for 16bit precision, b:fraction bits for ISP precision = */ -#define sDIGIT_FITTING(v, a, b) \ - min_t(int, max_t(int, (((v) >> sSHIFT) >> max(sFRACTION_BITS_FITTING(a) -= (b), 0)), \ - sISP_VAL_MIN), sISP_VAL_MAX) -#define uDIGIT_FITTING(v, a, b) \ - min((unsigned int)max((unsigned)(((v) >> uSHIFT) \ - >> max((int)(uFRACTION_BITS_FITTING(a) - (b)), 0)), \ - uISP_VAL_MIN), uISP_VAL_MAX) +static inline int sDIGIT_FITTING(int v, int a, int b) +{ + int fit_shift =3D sFRACTION_BITS_FITTING(a) - b; + + v >>=3D sSHIFT; + v >>=3D fit_shift > 0 ? fit_shift : 0; + + return clamp_t(int, v, sISP_VAL_MIN, sISP_VAL_MAX); +} + +static inline unsigned int uDIGIT_FITTING(unsigned int v, int a, int b) +{ + int fit_shift =3D uFRACTION_BITS_FITTING(a) - b; + + v >>=3D uSHIFT; + v >>=3D fit_shift > 0 ? fit_shift : 0; + + return clamp_t(unsigned int, v, uISP_VAL_MIN, uISP_VAL_MAX); +} #endif /* __SH_CSS_FRAC_H */ -- 2.46.0