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448325199f
bpf_long_memcpy is used while copying to remote percpu regions from BPF syscall and helpers, so that the copy is atomic at word size granularity. This might not be possible when you copy from map value hosting kptrs from or to percpu maps, as the alignment or size in disjoint regions may not be multiple of word size. Hence, to avoid complicating the copy loop, we only use bpf_long_memcpy when special fields are not present, otherwise use normal memcpy to copy the disjoint regions. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20220904204145.3089-2-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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