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/GCC 11

6.33.8 BPF Function Attributes

These function attributes are supported by the BPF back end:

kernel_helper

use this attribute to indicate the specified function declaration is a kernel helper. The helper function is passed as an argument to the attribute. Example:

int bpf_probe_read (void *dst, int size, const void *unsafe_ptr)
  __attribute__ ((kernel_helper (4)));

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https://gcc.gnu.org/onlinedocs/gcc-11.1.0/gcc/BPF-Function-Attributes.html