um: Add missing apply_returns()

Implement apply_returns() stub for UM, just like all the other patching routines. Fixes: 15e6722 ("x86: Undo return-thunk damage") Reported-by: Randy Dunlap <rdunlap@infradead.org) Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Richard Weinberger <richard@nod.at>
mariux64 · Jul 17, 2022 · 637285e · 637285e
1 parent dda520d
commit 637285e
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)
 {
 }