Merge v6.2-rc6 into drm-next

Due to holidays we started -next with more -fixes in-flight than
usual, and people have been asking where they are. Backmerge to get
things better in sync.

Conflicts:
- Tiny conflict in drm_fbdev_generic.c between variable rename and
  missing error handling that got added.
- Conflict in drm_fb_helper.c between the added call to vgaswitcheroo
  in drm_fb_helper_single_fb_probe and a refactor patch that extracted
  lots of helpers and incidentally removed the dev local variable.
  Readd it to make things compile.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 18 insertions, 11 deletions

diff --git a/rust/kernel/print.rs b/rust/kernel/print.rs
index 29bf9c2e8aee..30103325696d 100644
--- a/rust/kernel/print.rs
+++ b/rust/kernel/print.rs
@@ -142,17 +142,24 @@ pub fn call_printk_cont(args: fmt::Arguments<'_>) {
 macro_rules! print_macro (
     // The non-continuation cases (most of them, e.g. `INFO`).
     ($format_string:path, false, $($arg:tt)+) => (
-        // SAFETY: This hidden macro should only be called by the documented
-        // printing macros which ensure the format string is one of the fixed
-        // ones. All `__LOG_PREFIX`s are null-terminated as they are generated
-        // by the `module!` proc macro or fixed values defined in a kernel
-        // crate.
-        unsafe {
-            $crate::print::call_printk(
-                &$format_string,
-                crate::__LOG_PREFIX,
-                format_args!($($arg)+),
-            );
+        // To remain sound, `arg`s must be expanded outside the `unsafe` block.
+        // Typically one would use a `let` binding for that; however, `format_args!`
+        // takes borrows on the arguments, but does not extend the scope of temporaries.
+        // Therefore, a `match` expression is used to keep them around, since
+        // the scrutinee is kept until the end of the `match`.
+        match format_args!($($arg)+) {
+            // SAFETY: This hidden macro should only be called by the documented
+            // printing macros which ensure the format string is one of the fixed
+            // ones. All `__LOG_PREFIX`s are null-terminated as they are generated
+            // by the `module!` proc macro or fixed values defined in a kernel
+            // crate.
+            args => unsafe {
+                $crate::print::call_printk(
+                    &$format_string,
+                    crate::__LOG_PREFIX,
+                    args,
+                );
+            }
         }
     );