um: Add missing apply_returns()

commit 564d998 upstream. Implement apply_returns() stub for UM, just like all the other patching routines. Fixes: 15e6722 ("x86: Undo return-thunk damage") Reported-by: Randy Dunlap <[email protected]) Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Link: https://lore.kernel.org/r/Ys%2Ft45l%[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
sunlightlinux · Jul 23, 2022 · daf898a · daf898a
1 parent deacf52
commit daf898a
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
@@ -432,6 +432,10 @@ void apply_retpolines(s32 *start, s32 *end)
 {
 }
 
+void apply_returns(s32 *start, s32 *end)
+{
+}
+
 void apply_alternatives(struct alt_instr *start, struct alt_instr *end)
 {
 }