Patch "LoongArch: Call early_init_fdt_scan_reserved_mem() earlier" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    LoongArch: Call early_init_fdt_scan_reserved_mem() earlier

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     loongarch-call-early_init_fdt_scan_reserved_mem-earlier.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 9fa304b9f8ec440e614af6d35826110c633c4074 Mon Sep 17 00:00:00 2001
From: Huacai Chen <chenhuacai@xxxxxxxxxxx>
Date: Fri, 23 Feb 2024 14:36:31 +0800
Subject: LoongArch: Call early_init_fdt_scan_reserved_mem() earlier

From: Huacai Chen <chenhuacai@xxxxxxxxxxx>

commit 9fa304b9f8ec440e614af6d35826110c633c4074 upstream.

The unflatten_and_copy_device_tree() function contains a call to
memblock_alloc(). This means that memblock is allocating memory before
any of the reserved memory regions are set aside in the arch_mem_init()
function which calls early_init_fdt_scan_reserved_mem(). Therefore,
there is a possibility for memblock to allocate from any of the
reserved memory regions.

Hence, move the call to early_init_fdt_scan_reserved_mem() to be earlier
in the init sequence, so that the reserved memory regions are set aside
before any allocations are done using memblock.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 88d4d957edc707e ("LoongArch: Add FDT booting support from efi system table")
Signed-off-by: Oreoluwa Babatunde <quic_obabatun@xxxxxxxxxxx>
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 arch/loongarch/kernel/setup.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/loongarch/kernel/setup.c
+++ b/arch/loongarch/kernel/setup.c
@@ -367,6 +367,8 @@ void __init platform_init(void)
 	acpi_gbl_use_default_register_widths = false;
 	acpi_boot_table_init();
 #endif
+
+	early_init_fdt_scan_reserved_mem();
 	unflatten_and_copy_device_tree();
 
 #ifdef CONFIG_NUMA
@@ -400,8 +402,6 @@ static void __init arch_mem_init(char **
 
 	check_kernel_sections_mem();
 
-	early_init_fdt_scan_reserved_mem();
-
 	/*
 	 * In order to reduce the possibility of kernel panic when failed to
 	 * get IO TLB memory under CONFIG_SWIOTLB, it is better to allocate


Patches currently in stable-queue which might be from chenhuacai@xxxxxxxxxxx are

queue-6.6/loongarch-update-cpu_sibling_map-when-disabling-nonboot-cpus.patch
queue-6.6/loongarch-select-have_arch_seccomp-to-use-the-common.patch
queue-6.6/loongarch-vdso-disable-ubsan-instrumentation.patch
queue-6.6/loongarch-change-acpi_core_pic-nr_cpus-to-acpi_core_.patch
queue-6.6/loongarch-disable-irq-before-init_fn-for-nonboot-cpus.patch
queue-6.6/loongarch-select-arch_enable_thp_migration-instead-o.patch
queue-6.6/loongarch-call-early_init_fdt_scan_reserved_mem-earlier.patch




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