netdev - [PATCH hotfix 6.11 v2 1/3] minmax: reduce min/max macro expansion in mvpp2 driver

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Message-ID: <0f2607b7c4a7863e2f9590301d88e61dd89c31d0.1726074904.git.lorenzo.stoakes@oracle.com>
Date: Wed, 11 Sep 2024 18:51:09 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Richard Narron <richard@...zen.com>, Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Marcin Wojtas <marcin.s.wojtas@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Arnd Bergmann <arnd@...nel.org>,
        Linus Torvalds <torvalds@...uxfoundation.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-mm@...ck.org,
        Andrew Lunn <andrew@...n.ch>, Dan Carpenter <dan.carpenter@...aro.org>,
        stable@...r.kernel.org
Subject: [PATCH hotfix 6.11 v2 1/3] minmax: reduce min/max macro expansion in mvpp2 driver

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@...r.kernel.org
Fixes: 867046cc7027 ("minmax: relax check to allow comparison between unsigned arguments and signed constants")
Reviewed-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
---
 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/ethernet/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 wide,
  * so the maximum offset is 7 * 32 = 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