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mm/memblock: add memblock_alloc_or_panic interface

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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 <guoweikang.kernel@gmail.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>	[s390]
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Guo Weikang
2025-01-02 15:25:28 +08:00
committed by Andrew Morton
parent f8d4a6cabb
commit c6f239796b
65 changed files with 144 additions and 431 deletions
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10
arch/arm/kernel/setup.c
View File

@@ -880,10 +880,7 @@ static void __init request_standard_resources(const struct machine_desc *mdesc)
*/
boot_alias_start = phys_to_idmap(start);
if (arm_has_idmap_alias() && boot_alias_start != IDMAP_INVALID_ADDR) {
res = memblock_alloc(sizeof(*res), SMP_CACHE_BYTES);
if (!res)
panic("%s: Failed to allocate %zu bytes\n",
__func__, sizeof(*res));
res = memblock_alloc_or_panic(sizeof(*res), SMP_CACHE_BYTES);
res->name = "System RAM (boot alias)";
res->start = boot_alias_start;
res->end = phys_to_idmap(res_end);
@@ -891,10 +888,7 @@ static void __init request_standard_resources(const struct machine_desc *mdesc)
request_resource(&iomem_resource, res);
}
res = memblock_alloc(sizeof(*res), SMP_CACHE_BYTES);
if (!res)
panic("%s: Failed to allocate %zu bytes\n", __func__,
sizeof(*res));
res = memblock_alloc_or_panic(sizeof(*res), SMP_CACHE_BYTES);
res->name = "System RAM";
res->start = start;
res->end = res_end;