The patch titled
Subject: powerpc: move the ARCH_DMA_MINALIGN definition to asm/cache.h
has been added to the -mm mm-unstable branch. Its filename is
powerpc-move-the-arch_dma_minalign-definition-to-asm-cacheh.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/powerpc-move-the-arch_dma_minalign-definition-to-asm-cacheh.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Catalin Marinas <catalin.marinas@xxxxxxx>
Subject: powerpc: move the ARCH_DMA_MINALIGN definition to asm/cache.h
Date: Tue, 13 Jun 2023 16:52:43 +0100
Patch series "Move the ARCH_DMA_MINALIGN definition to asm/cache.h".
The ARCH_KMALLOC_MINALIGN reduction series defines a generic
ARCH_DMA_MINALIGN in linux/cache.h:
https://lore.kernel.org/r/20230612153201.554742-2-catalin.marinas@xxxxxxx/
Unfortunately, this causes a duplicate definition warning for
microblaze, powerpc (32-bit only) and sh as these architectures define
ARCH_DMA_MINALIGN in a different file than asm/cache.h. Move the macro
to asm/cache.h to avoid this issue and also bring them in line with the
other architectures.
This patch (of 3):
The powerpc architecture defines ARCH_DMA_MINALIGN in asm/page_32.h and
only if CONFIG_NOT_COHERENT_CACHE is enabled (32-bit platforms only).
Move this macro to asm/cache.h to allow a generic ARCH_DMA_MINALIGN
definition in linux/cache.h without redefine errors/warnings.
Link: https://lkml.kernel.org/r/20230613155245.1228274-1-catalin.marinas@xxxxxxx
Link: https://lkml.kernel.org/r/20230613155245.1228274-2-catalin.marinas@xxxxxxx
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202306131053.1ybvRRhO-lkp@xxxxxxxxx/
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Cc: Michal Simek <monstr@xxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/asm/cache.h | 4 ++++
arch/powerpc/include/asm/page_32.h | 4 ----
2 files changed, 4 insertions(+), 4 deletions(-)
--- a/arch/powerpc/include/asm/cache.h~powerpc-move-the-arch_dma_minalign-definition-to-asm-cacheh
+++ a/arch/powerpc/include/asm/cache.h
@@ -33,6 +33,10 @@
#define IFETCH_ALIGN_BYTES (1 << IFETCH_ALIGN_SHIFT)
+#ifdef CONFIG_NOT_COHERENT_CACHE
+#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
+#endif
+
#if !defined(__ASSEMBLY__)
#ifdef CONFIG_PPC64
--- a/arch/powerpc/include/asm/page_32.h~powerpc-move-the-arch_dma_minalign-definition-to-asm-cacheh
+++ a/arch/powerpc/include/asm/page_32.h
@@ -12,10 +12,6 @@
#define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32
-#ifdef CONFIG_NOT_COHERENT_CACHE
-#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
-#endif
-
#if defined(CONFIG_PPC_256K_PAGES) || \
(defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES))
#define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2 - 2) /* 1/4 of a page */
_
Patches currently in -mm which might be from catalin.marinas@xxxxxxx are
mm-slab-decouple-arch_kmalloc_minalign-from-arch_dma_minalign.patch
dma-allow-dma_get_cache_alignment-to-be-overridden-by-the-arch-code.patch
mm-slab-simplify-create_kmalloc_cache-args-and-make-it-static.patch
mm-slab-limit-kmalloc-minimum-alignment-to-dma_get_cache_alignment.patch
drivers-base-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch
drivers-gpu-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch
drivers-usb-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch
drivers-spi-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch
dm-crypt-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch
iio-core-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch
arm64-allow-kmalloc-caches-aligned-to-the-smaller-cache_line_size.patch
dma-mapping-force-bouncing-if-the-kmalloc-size-is-not-cache-line-aligned.patch
iommu-dma-force-bouncing-if-the-size-is-not-cacheline-aligned.patch
mm-slab-reduce-the-kmalloc-minimum-alignment-if-dma-bouncing-possible.patch
arm64-enable-arch_want_kmalloc_dma_bounce-for-arm64.patch
powerpc-move-the-arch_dma_minalign-definition-to-asm-cacheh.patch
microblaze-move-the-arch_dmaslab_minalign-definitions-to-asm-cacheh.patch
sh-move-the-arch_dma_minalign-definition-to-asm-cacheh.patch
