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charset="utf-8" When dealing with structures containing flexible arrays, struct_size() provides additional compile-time checks compared to offsetof(). This enhances code robustness and reduces the risk of potential errors. Signed-off-by: Xichao Zhao --- kernel/events/callchain.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c index 6c83ad674d01..0f88e44af664 100644 --- a/kernel/events/callchain.c +++ b/kernel/events/callchain.c @@ -80,7 +80,7 @@ static int alloc_callchain_buffers(void) * accessed from NMI. Use a temporary manual per cpu allocation * until that gets sorted out. */ - size =3D offsetof(struct callchain_cpus_entries, cpu_entries[nr_cpu_ids]); + size =3D struct_size(entries, cpu_entries, nr_cpu_ids); =20 entries =3D kzalloc(size, GFP_KERNEL); if (!entries) --=20 2.34.1