Fix the following warning observed when building 64-bit (actually arm64)
kernel with clang-17 (make LLVM=1 W=1):

include/linux/sunrpc/xdr.h:779:10: warning: result of comparison of constant
4611686018427387903 with expression of type '__u32' (aka 'unsigned int') is
always false [-Wtautological-constant-out-of-range-compare]
  779 |         if (len > SIZE_MAX / sizeof(*p))

That is, an overflow check makes sense for 32-bit kernel only.

Signed-off-by: Dmitry Antipov <redacted>
---
 include/linux/sunrpc/xdr.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index 72014c9216fc..b2d5dc89cf7b 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h

@@ -776,7 +776,7 @@ xdr_stream_decode_uint32_array(struct xdr_stream *xdr,
 
 	if (unlikely(xdr_stream_decode_u32(xdr, &len) < 0))
 		return -EBADMSG;
-	if (len > SIZE_MAX / sizeof(*p))
+	if (unlikely(SIZE_MAX == U32_MAX ? (len > U32_MAX / sizeof(*p)) : 0))
 		return -EBADMSG;
 	p = xdr_inline_decode(xdr, len * sizeof(*p));
 	if (unlikely(!p))

-- 
2.40.1