[xen master] x86/altcall: hide casting away of const

[patchbot@xxxxxxx]

commit 74b000804485db0d1b02b4f714b975643379c405
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Mon Sep 7 10:41:04 2026 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Sep 7 10:41:04 2026 +0200

    x86/altcall: hide casting away of const
    
    ALT_CALL_PTR() really means to get rid of const (when necessary, i.e. when
    used from apply_alt_calls()): We want to patch the original call site,
    after all, and memory-wise that's unrelated to the struct alt_call * that
    we start from.
    
    No functional change intended.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Roger Pau Monné <roger@xxxxxxxxxxxxxx>
---
 xen/arch/x86/include/asm/alternative-call.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/include/asm/alternative-call.h 
b/xen/arch/x86/include/asm/alternative-call.h
index 27024797f5..809023bc4d 100644
--- a/xen/arch/x86/include/asm/alternative-call.h
+++ b/xen/arch/x86/include/asm/alternative-call.h
@@ -9,7 +9,7 @@
 struct alt_call {
     int32_t offset;
 };
-#define ALT_CALL_PTR(a) ((void *)&(a)->offset + (a)->offset)
+#define ALT_CALL_PTR(a) ((void *)((long)&(a)->offset + (a)->offset))
 #define ALT_CALL_LEN(a) (6)
 
 /*
--
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