linux-stable.git/arch/s390/kernel/numa.c, branch linux-rolling-stable

mm/memblock: add memblock_alloc_or_panic interface

2025-01-26T04:22:38+00:00

Before SLUB initialization, various subsystems used memblock_alloc to
allocate memory.  In most cases, when memory allocation fails, an
immediate panic is required.  To simplify this behavior and reduce
repetitive checks, introduce `memblock_alloc_or_panic`.  This function
ensures that memory allocation failures result in a panic automatically,
improving code readability and consistency across subsystems that require
this behavior.

[guoweikang.kernel@gmail.com: arch/s390: save_area_alloc default failure behavior changed to panic]
  Link: https://lkml.kernel.org/r/20250109033136.2845676-1-guoweikang.kernel@gmail.com
  Link: https://lore.kernel.org/lkml/Z2fknmnNtiZbCc7x@kernel.org/
Link: https://lkml.kernel.org/r/20250102072528.650926-1-guoweikang.kernel@gmail.com
Signed-off-by: Guo Weikang 
Acked-by: Geert Uytterhoeven 	[m68k]
Reviewed-by: Alexander Gordeev 	[s390]
Acked-by: Mike Rapoport (Microsoft) 
Cc: Alexander Gordeev 
Signed-off-by: Andrew Morton

arch, mm: move definition of node_data to generic code

2024-09-04T04:15:28+00:00

Every architecture that supports NUMA defines node_data in the same way:

	struct pglist_data *node_data[MAX_NUMNODES];

No reason to keep multiple copies of this definition and its forward
declarations, especially when such forward declaration is the only thing
in include/asm/mmzone.h for many architectures.

Add definition and declaration of node_data to generic code and drop
architecture-specific versions.

Link: https://lkml.kernel.org/r/20240807064110.1003856-8-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) 
Acked-by: David Hildenbrand 
Reviewed-by: Jonathan Cameron 
Acked-by: Davidlohr Bueso 
Tested-by: Zi Yan  # for x86_64 and arm64
Tested-by: Jonathan Cameron  [arm64 + CXL via QEMU]
Acked-by: Dan Williams 
Cc: Alexander Gordeev 
Cc: Andreas Larsson 
Cc: Arnd Bergmann 
Cc: Borislav Petkov 
Cc: Catalin Marinas 
Cc: Christophe Leroy 
Cc: Dave Hansen 
Cc: David S. Miller 
Cc: Greg Kroah-Hartman 
Cc: Heiko Carstens 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: Jiaxun Yang 
Cc: John Paul Adrian Glaubitz 
Cc: Jonathan Corbet 
Cc: Michael Ellerman 
Cc: Palmer Dabbelt 
Cc: Rafael J. Wysocki 
Cc: Rob Herring (Arm) 
Cc: Samuel Holland 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleixner 
Cc: Vasily Gorbik 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

drivers/base/node: consolidate node device subsystem initialization in node_dev_init()

2022-03-22T22:57:10+00:00

...  and call node_dev_init() after memory_dev_init() from driver_init(),
so before any of the existing arch/subsys calls.  All online nodes should
be known at that point: early during boot, arch code determines node and
zone ranges and sets the relevant nodes online; usually this happens in
setup_arch().

This is in line with memory_dev_init(), which initializes the memory
device subsystem and creates all memory block devices.

Similar to memory_dev_init(), panic() if anything goes wrong, we don't
want to continue with such basic initialization errors.

The important part is that node_dev_init() gets called after
memory_dev_init() and after cpu_dev_init(), but before any of the relevant
archs call register_cpu() to register the new cpu device under the node
device.  The latter should be the case for the current users of
topology_init().

Link: https://lkml.kernel.org/r/20220203105212.30385-1-david@redhat.com
Signed-off-by: David Hildenbrand 
Reviewed-by: Oscar Salvador 
Tested-by: Anatoly Pugachev  (sparc64)
Cc: Greg Kroah-Hartman 
Cc: Michal Hocko 
Cc: Oscar Salvador 
Cc: Mike Rapoport 
Cc: Catalin Marinas 
Cc: Will Deacon 
Cc: Thomas Bogendoerfer 
Cc: Michael Ellerman 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Paul Walmsley 
Cc: Palmer Dabbelt 
Cc: Albert Ou 
Cc: Heiko Carstens 
Cc: Vasily Gorbik 
Cc: Yoshinori Sato 
Cc: Rich Felker 
Cc: "David S. Miller" 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: Borislav Petkov 
Cc: Dave Hansen 
Cc: "Rafael J. Wysocki" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

s390/numa: move code to arch/s390/kernel

2020-08-11T16:16:55+00:00

Move all code from arch/s390/numa/ to arch/s390/kernel/
since numa.c is the only source file and all others were
deleted with the fake NUMA support removal.

Signed-off-by: Alexander Gordeev 
Signed-off-by: Heiko Carstens