[xen staging] xen/altcall: Use __ro_after_init now that it exists

[patchbot@xxxxxxx]

commit a0d8a94360a6337efcb5048293d527274fea1c96
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Feb 11 16:38:47 2022 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Feb 23 15:33:43 2022 +0000

    xen/altcall: Use __ro_after_init now that it exists
    
    For the !CONFIG_ALTERNATIVE_CALL case, the use of __read_mostly was only a
    stopgap while nothing better existed.  __ro_after_init now does, so it use.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/include/xen/alternative-call.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/include/xen/alternative-call.h 
b/xen/include/xen/alternative-call.h
index c2d3b70e31..5c6b9a562b 100644
--- a/xen/include/xen/alternative-call.h
+++ b/xen/include/xen/alternative-call.h
@@ -57,7 +57,7 @@
 #define alternative_call(func, args...)  (func)(args)
 #define alternative_vcall(func, args...) (func)(args)
 
-#define __alt_call_maybe_initdata __read_mostly
+#define __alt_call_maybe_initdata __ro_after_init
 
 #endif /* !CONFIG_ALTERNATIVE_CALL */
 #endif /* XEN_ALTERNATIVE_CALL */
--
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