Thread (6 messages) 6 messages, 3 authors, 2024-09-11
STALE680d REVIEWED: 8 (8M)

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

From: Lorenzo Stoakes <hidden>
Date: 2024-09-11 17:51:46
Also in: linux-media, linux-mm, linux-staging, lkml, stable
Subsystem: marvell mvpp2 ethernet driver, networking drivers, the rest · Maintainers: Marcin Wojtas, Russell King, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds

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 unsigned arguments and signed constants")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Lorenzo Stoakes <redacted>
---
 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
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