compiler-builtins: Change gating for outline atomic symbols

Build the symbols whenever outline atomics is in our baseline, rather
than only on Linux. Since this is no longer Linux-specific, also rename
the module.

Author: tgross35

library/compiler-builtins/compiler-builtins/src/aarch64_linux.rs renamed to library/compiler-builtins/compiler-builtins/src/aarch64_outline_atomics.rs

@@ -196,7 +196,7 @@ macro_rules! compare_and_swap {
                     "cbnz   w17, 0b",
                     "1:",
                     "ret",
-                    have_lse = sym crate::aarch64_linux::HAVE_LSE_ATOMICS,
+                    have_lse = sym crate::aarch64_outline_atomics::HAVE_LSE_ATOMICS,
                 }
             }
         }
@@ -228,7 +228,7 @@ macro_rules! compare_and_swap_i128 {
                     "cbnz   w15, 0b",
                     "1:",
                     "ret",
-                    have_lse = sym crate::aarch64_linux::HAVE_LSE_ATOMICS,
+                    have_lse = sym crate::aarch64_outline_atomics::HAVE_LSE_ATOMICS,
                 }
             }
         }
@@ -256,7 +256,7 @@ macro_rules! swap {
                     concat!(stxr!($ordering, $bytes), " w17, ", reg!($bytes, 16), ", [x1]"),
                     "cbnz   w17, 0b",
                     "ret",
-                    have_lse = sym crate::aarch64_linux::HAVE_LSE_ATOMICS,
+                    have_lse = sym crate::aarch64_outline_atomics::HAVE_LSE_ATOMICS,
                 }
             }
         }
@@ -286,7 +286,7 @@ macro_rules! fetch_op {
                     concat!(stxr!($ordering, $bytes), " w15, ", reg!($bytes, 17), ", [x1]"),
                     "cbnz  w15, 0b",
                     "ret",
-                    have_lse = sym crate::aarch64_linux::HAVE_LSE_ATOMICS,
+                    have_lse = sym crate::aarch64_outline_atomics::HAVE_LSE_ATOMICS,
                 }
             }
         }

library/compiler-builtins/compiler-builtins/src/lib.rs

@@ -56,8 +56,8 @@ pub mod arm;
 #[cfg(any(target_arch = "aarch64", target_arch = "arm64ec"))]
 pub mod aarch64;
 
-#[cfg(all(target_arch = "aarch64", target_os = "linux"))]
-pub mod aarch64_linux;
+#[cfg(all(target_arch = "aarch64", target_feature = "outline-atomics"))]
+pub mod aarch64_outline_atomics;
 
 #[cfg(all(
     kernel_user_helpers,