This is useful in particular to mark the pointer as volatile, so that
compiler treats each load and store to the field as a volatile access.
The alternative is having to define and use READ_ONCE and WRITE_ONCE in
the BPF program.
Signed-off-by: NKumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: NDavid Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20221103191013.1236066-3-memxor@gmail.comSigned-off-by: NAlexei Starovoitov <ast@kernel.org>