[ Upstream commit f880eea68fe593342fa6e09be9bb661f3c297aec ]

Use specific prototype instead of an opaque pointer so that the
compiler can catch function prototype mismatch.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: NMathieu Malaterre <malat@debian.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>