diff options
| author |   Guo Weikang <guoweikang.kernel@gmail.com> | 2025-01-02 15:25:28 +0800 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2025-01-25 20:22:38 -0800 |
| commit | c6f239796b55dbc4225a6fca9f96232092b9df83 (patch) | |
| tree | d741398d6afb6bc2a736fae13ed589ceb5b679e7 /arch/um/drivers | |
| parent | mm: make mmap_region() internal (diff) | |
| download | wireguard-linux-c6f239796b55dbc4225a6fca9f96232092b9df83.tar.xz wireguard-linux-c6f239796b55dbc4225a6fca9f96232092b9df83.zip | |
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 <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>
Diffstat (limited to 'arch/um/drivers')
| -rw-r--r-- | arch/um/drivers/net_kern.c | 5 | ||||
| -rw-r--r-- | arch/um/drivers/vector_kern.c | 5 |
2 files changed, 2 insertions, 8 deletions
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c index 75d04fb4994a..d5a9c5aabaec 100644 --- a/arch/um/drivers/net_kern.c +++ b/arch/um/drivers/net_kern.c @@ -636,10 +636,7 @@ static int __init eth_setup(char *str) return 1; } - new = memblock_alloc(sizeof(*new), SMP_CACHE_BYTES); - if (!new) - panic("%s: Failed to allocate %zu bytes\n", __func__, - sizeof(*new)); + new = memblock_alloc_or_panic(sizeof(*new), SMP_CACHE_BYTES); INIT_LIST_HEAD(&new->list); new->index = n; diff --git a/arch/um/drivers/vector_kern.c b/arch/um/drivers/vector_kern.c index 64c09db392c1..85b129e2b70b 100644 --- a/arch/um/drivers/vector_kern.c +++ b/arch/um/drivers/vector_kern.c @@ -1694,10 +1694,7 @@ static int __init vector_setup(char *str) str, error); return 1; } - new = memblock_alloc(sizeof(*new), SMP_CACHE_BYTES); - if (!new) - panic("%s: Failed to allocate %zu bytes\n", __func__, - sizeof(*new)); + new = memblock_alloc_or_panic(sizeof(*new), SMP_CACHE_BYTES); INIT_LIST_HEAD(&new->list); new->unit = n; new->arguments = str; |