From: Rosen Penev <rosenp@gmail.com>
Date: Wed, 27 May 2026 22:25:04 +0000 (-0700)
Subject: MIPS: ath79: reduce ARCH_DMA_MINALIGN
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=aeaa898780a4edb5802731e454caae6fb2ba33cb;p=thirdparty%2Fkernel%2Flinux.git

MIPS: ath79: reduce ARCH_DMA_MINALIGN

Currently, ath79 SoCs use the default ARCH_DMA_MINALIGN value of 128
bytes defined in mach-generic. This is excessive for these platforms
and leads to significant memory waste in kmalloc.

Override ARCH_DMA_MINALIGN to use L1_CACHE_BYTES, which is 32 bytes for
ath79 SoCs.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---

diff --git a/arch/mips/include/asm/mach-ath79/kmalloc.h b/arch/mips/include/asm/mach-ath79/kmalloc.h
new file mode 100644
index 0000000000000..954f5d6e0dd0c
--- /dev/null
+++ b/arch/mips/include/asm/mach-ath79/kmalloc.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_MACH_ATH79_KMALLOC_H
+#define __ASM_MACH_ATH79_KMALLOC_H
+
+#define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
+
+#endif /* __ASM_MACH_ATH79_KMALLOC_H */