From c6f239796b55dbc4225a6fca9f96232092b9df83 Mon Sep 17 00:00:00 2001 From: Guo Weikang Date: Thu, 2 Jan 2025 15:25:28 +0800 Subject: mm/memblock: add memblock_alloc_or_panic interface 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 --- kernel/power/snapshot.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'kernel/power/snapshot.c') diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index 30894d8f0a78..c9fb559a6399 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -1011,11 +1011,8 @@ void __init register_nosave_region(unsigned long start_pfn, unsigned long end_pf } } /* This allocation cannot fail */ - region = memblock_alloc(sizeof(struct nosave_region), + region = memblock_alloc_or_panic(sizeof(struct nosave_region), SMP_CACHE_BYTES); - if (!region) - panic("%s: Failed to allocate %zu bytes\n", __func__, - sizeof(struct nosave_region)); region->start_pfn = start_pfn; region->end_pfn = end_pfn; list_add_tail(®ion->list, &nosave_regions); -- cgit v1.2.3