From 2bcbb25cb5463873591e779cbace39d9aef66a96 Mon Sep 17 00:00:00 2001
From: inquisitivecrystal
 <22333129+inquisitivecrystal@users.noreply.github.com>
Date: Wed, 7 Jul 2021 17:42:03 -0700
Subject: [PATCH] Remove `missing_docs` lint on private 2.0 macros

---
 compiler/rustc_lint/src/builtin.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/compiler/rustc_lint/src/builtin.rs b/compiler/rustc_lint/src/builtin.rs
index b303f55cf772..24d9e8fc2396 100644
--- a/compiler/rustc_lint/src/builtin.rs
+++ b/compiler/rustc_lint/src/builtin.rs
@@ -571,6 +571,11 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc {
         self.check_missing_docs_attrs(cx, hir::CRATE_HIR_ID, krate.item.inner, "the", "crate");
 
         for macro_def in krate.exported_macros {
+            // Non exported MBE 2.0 macros should be skipped
+            if !macro_def.ast.macro_rules && !cx.access_levels.is_exported(macro_def.hir_id()) {
+                continue;
+            }
+
             let attrs = cx.tcx.hir().attrs(macro_def.hir_id());
             let has_doc = attrs.iter().any(|a| has_doc(cx.sess(), a));
             if !has_doc {