Auto merge of #147330 - matthiaskrgr:rollup-h4jyzmv, r=matthiaskrgr auto

Rollup of 11 pull requests

Successful merges:

 - rust-lang/rust#142670 (Document fully-qualified syntax in `as`' keyword doc)
 - rust-lang/rust#145685 (add CloneFromCell and Cell::get_cloned)
 - rust-lang/rust#146330 (Bump unicode_data and printables to version 17.0.0)
 - rust-lang/rust#146451 (Fix atan2 inaccuracy in documentation)
 - rust-lang/rust#146479 (add mem::conjure_zst)
 - rust-lang/rust#147117 (interpret `#[used]` as `#[used(compiler)]` on illumos)
 - rust-lang/rust#147190 (std: `sys::net` cleanups)
 - rust-lang/rust#147251 (Do not assert that a change in global cache only happens when concurrent)
 - rust-lang/rust#147280 (Return to needs-llvm-components being info-only)
 - rust-lang/rust#147288 (compiletest: Make `DirectiveLine` responsible for name/value splitting)
 - rust-lang/rust#147315 (bless autodiff batching test)

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 2 insertions, 1 deletions

diff --git a/compiler/rustc_hir/src/attrs/data_structures.rs b/compiler/rustc_hir/src/attrs/data_structures.rs
index ddcbaeaad88..beeca7332cb 100644
--- a/compiler/rustc_hir/src/attrs/data_structures.rs
+++ b/compiler/rustc_hir/src/attrs/data_structures.rs
@@ -146,12 +146,13 @@ impl Deprecation {
 }
 
 /// There are three valid forms of the attribute:
-/// `#[used]`, which is semantically equivalent to `#[used(linker)]` except that the latter is currently unstable.
+/// `#[used]`, which is equivalent to `#[used(linker)]` on targets that support it, but `#[used(compiler)]` if not.
 /// `#[used(compiler)]`
 /// `#[used(linker)]`
 #[derive(Encodable, Decodable, Copy, Clone, Debug, PartialEq, Eq, Hash)]
 #[derive(HashStable_Generic, PrintAttribute)]
 pub enum UsedBy {
+    Default,
     Compiler,
     Linker,
 }