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bpf: Add bpf_map_{value_size, update_value, map_copy_value} functions
This commit moves reusable code from map_lookup_elem and map_update_elem to avoid code duplication in kernel/bpf/syscall.c. Signed-off-by: Brian Vazquez <brianvv@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20200115184308.162644-2-brianvv@google.com
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Brian Vazquez
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Alexei Starovoitov
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Jan 15, 2020
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