[PATCH] MIPS: ath79: reduce ARCH_DMA_MINALIGN

[Rosen Penev]

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@xxxxxxxxx>
---
 arch/mips/include/asm/mach-ath79/kmalloc.h | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 arch/mips/include/asm/mach-ath79/kmalloc.h

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 000000000000..954f5d6e0dd0
--- /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 */
-- 
2.54.0