The patch titled
Subject: arm: mem_init: use memblock_phys_free() to free DMA memory on SA1111
has been added to the -mm mm-unstable branch. Its filename is
arm-mem_init-use-memblock_phys_free-to-free-dma-memory-on-sa1111.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/arm-mem_init-use-memblock_phys_free-to-free-dma-memory-on-sa1111.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: "Mike Rapoport (Microsoft)" <rppt@xxxxxxxxxx>
Subject: arm: mem_init: use memblock_phys_free() to free DMA memory on SA1111
Date: Thu, 13 Mar 2025 15:49:51 +0200
Patch series "arch, mm: reduce code duplication in mem_init()", v2.
Every architecture has implementation of mem_init() function and some even
more than one. All these release free memory to the buddy allocator, most
of them set high_memory to the end of directly addressable memory and many
of them set max_mapnr for FLATMEM case.
These patches pull the commonalities into the generic code and refactor
some of the mem_init() implementations so that many of them can be just
dropped.
This patch (of 13):
This will help to pull out memblock_free_all() to generic code.
Link: https://lkml.kernel.org/r/20250313135003.836600-1-rppt@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20250313135003.836600-2-rppt@xxxxxxxxxx
Signed-off-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
Tested-by: Mark Brown <broonie@xxxxxxxxxx>
Cc: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Cc: Andreas Larsson <andreas@xxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Borislav Betkov <bp@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxxxxx>
Cc: Guo Ren <guoren@xxxxxxxxxx>
Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Cc: Huacai Chen <chenhuacai@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Cc: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Cc: Madhavan Srinivasan <maddy@xxxxxxxxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: Max Filippov <jcmvbkbc@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Michal Simek <monstr@xxxxxxxxx>
Cc: "Mike Rapoport (IBM)" <rppt@xxxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Russel King <linux@xxxxxxxxxxxxxxx>
Cc: Stafford Horne <shorne@xxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Thomas Gleinxer <tglx@xxxxxxxxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Vineet Gupta <vgupta@xxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/mm/init.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/arch/arm/mm/init.c~arm-mem_init-use-memblock_phys_free-to-free-dma-memory-on-sa1111
+++ a/arch/arm/mm/init.c
@@ -277,14 +277,14 @@ void __init mem_init(void)
set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
- /* this will put all unused low memory onto the freelists */
- memblock_free_all();
-
#ifdef CONFIG_SA1111
/* now that our DMA memory is actually so designated, we can free it */
- free_reserved_area(__va(PHYS_OFFSET), swapper_pg_dir, -1, NULL);
+ memblock_phys_free(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET);
#endif
+ /* this will put all unused low memory onto the freelists */
+ memblock_free_all();
+
free_highpages();
/*
_
Patches currently in -mm which might be from rppt@xxxxxxxxxx are
arm-mem_init-use-memblock_phys_free-to-free-dma-memory-on-sa1111.patch
csky-move-setup_initrd-to-setupc.patch
hexagon-move-initialization-of-init_mmcontext-init-to-paging_init.patch
mips-consolidate-mem_init-for-numa-machines.patch
mips-make-setup_zero_pages-use-memblock.patch
nios2-move-pr_debug-about-memory-start-and-end-to-setup_arch.patch
s390-make-setup_zero_pages-use-memblock.patch
xtensa-split-out-printing-of-virtual-memory-layout-to-a-function.patch
arch-mm-set-max_mapnr-when-allocating-memory-map-for-flatmem.patch
arch-mm-set-high_memory-in-free_area_init.patch
arch-mm-streamline-highmem-freeing.patch
arch-mm-introduce-arch_mm_preinit.patch
arch-mm-make-releasing-of-memory-to-page-allocator-more-explicit.patch
