Merge pull request torvalds#766 from sulix/rust-uml

Add support for building under x86_64 User-Mode-Linux (UML)

Author: ojeda

arch/um/Kconfig

@@ -24,6 +24,7 @@ config UML
 	select TRACE_IRQFLAGS_SUPPORT
 	select TTY # Needed for line.c
 	select HAVE_ARCH_VMAP_STACK
+	select HAVE_RUST			if X86_64
 
 config MMU
 	bool

rust/kernel/irq.rs

@@ -352,10 +352,12 @@ impl Drop for ChainedGuard<'_> {
 /// # Invariants
 ///
 /// The pointer `Domain::ptr` is non-null and valid.
+#[cfg(CONFIG_IRQ_DOMAIN)]
 pub struct Domain {
     ptr: *mut bindings::irq_domain,
 }
 
+#[cfg(CONFIG_IRQ_DOMAIN)]
 impl Domain {
     /// Constructs a new `struct irq_domain` wrapper.
     ///

rust/kernel/lib.rs

@@ -87,6 +87,7 @@ pub mod sync;
 pub mod sysctl;
 
 pub mod io_buffer;
+#[cfg(CONFIG_HAS_IOMEM)]
 pub mod io_mem;
 pub mod iov_iter;
 pub mod of;

scripts/generate_rust_target.rs

@@ -198,7 +198,7 @@ fn main() {
             features += ",+c";
         }
         ts.push("features", features);
-    } else if cfg.has("X86") {
+    } else if cfg.has("X86_64") {
         ts.push("arch", "x86_64");
         ts.push(
             "data-layout",