[PATCH v2 3/7] x86/bugs: Exit early if return thunk is already set

[Pawan Gupta <pawan.kumar.gupta@linux.intel.com>]

ITS and retbleed can both set CDT return thunk. If the exact same return
thunk is already set, avoid the warning and exit early.

Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
---
 arch/x86/kernel/cpu/bugs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 20d7d14b08298d4f610f2ebc7f13a490ee3d957a..a088302b320cf68344e28be7710b5a3582bba9ea 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -113,6 +113,9 @@ void (*x86_return_thunk)(void) __ro_after_init = __x86_return_thunk;
 
 static void __init set_return_thunk(void *thunk)
 {
+	if (thunk == x86_return_thunk)
+		return;
+
 	if (x86_return_thunk != __x86_return_thunk)
 		pr_warn("x86/bugs: return thunk changed\n");
 

-- 
2.34.1