[PATCH] x86/intel: Move mcu_opt_ctrl_* into __ro_after_init

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

They're only modified by set_in_mcu_opt_ctrl() which is an __init function.

No functional change.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>

In principle:
  Fixes: 39a40f3835ef ("x86/spec-ctrl: Clean up MSR_MCU_OPT_CTRL handling")

seeing as __ro_after_init existed at the time, but it was tied up in a
security series and __ro_after_init was very new at the time.
---
 xen/arch/x86/cpu/intel.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/cpu/intel.c b/xen/arch/x86/cpu/intel.c
index 63f65ea5b048..12c3ff65e02f 100644
--- a/xen/arch/x86/cpu/intel.c
+++ b/xen/arch/x86/cpu/intel.c
@@ -21,8 +21,8 @@
  * MSR_MCU_OPT_CTRL is a collection of unrelated functionality, with separate
  * enablement requirements, but which want to be consistent across the system.
  */
-static uint32_t __read_mostly mcu_opt_ctrl_mask;
-static uint32_t __read_mostly mcu_opt_ctrl_val;
+static uint32_t __ro_after_init mcu_opt_ctrl_mask;
+static uint32_t __ro_after_init mcu_opt_ctrl_val;
 
 void update_mcu_opt_ctrl(void)
 {

base-commit: a1ce987411f61dbf5fe64bba0cd3d36d7cc0311f
-- 
2.39.5