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opal_mpipl_query_tag() takes a pointer to a 64-bit value, which firmware
writes a value to. As OPAL is traditionally big endian this value will
be big endian.
This can be confirmed by looking at the implementation in skiboot:
static uint64_t opal_mpipl_query_tag(enum opal_mpipl_tags tag, __be64 *tag_val)
{
...
*tag_val = cpu_to_be64(opal_mpipl_tags[tag]);
return OPAL_SUCCESS;
}
Fix the declaration to annotate that the value is big endian.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210421125402.1955013-2-mpe@ellerman.id.au
d936f8182e