[xen staging] x86/MCE-telem: adjust cookie definition

[patchbot@xxxxxxx]

commit 75fc9e692c602c528f82894a7a71ed0a3b46a51a
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Feb 20 13:50:19 2025 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Feb 20 13:50:19 2025 +0100

    x86/MCE-telem: adjust cookie definition
    
    struct mctelem_ent is opaque outside of mcetelem.c; the cookie
    abstraction exists - afaict - just to achieve this opaqueness. Then it
    is irrelevant though which kind of pointer mctelem_cookie_t resolves to.
    IOW we can as well use struct mctelem_ent there, allowing to remove the
    casts from COOKIE2MCTE() and MCTE2COOKIE(). Their removal addresses
    Misra C:2012 rule 11.2 ("Conversions shall not be performed between a
    pointer to an incomplete type and any other type") violations.
    
    No functional change intended.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Release-Acked-By: Oleksii Kurochko<oleksii.kurochko@xxxxxxxxx>
---
 xen/arch/x86/cpu/mcheck/mctelem.c | 4 ++--
 xen/arch/x86/cpu/mcheck/mctelem.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/xen/arch/x86/cpu/mcheck/mctelem.c 
b/xen/arch/x86/cpu/mcheck/mctelem.c
index 123e4102ad..ddd4c4cb7b 100644
--- a/xen/arch/x86/cpu/mcheck/mctelem.c
+++ b/xen/arch/x86/cpu/mcheck/mctelem.c
@@ -64,8 +64,8 @@ struct mctelem_ent {
 
 #define MC_NENT (MC_URGENT_NENT + MC_NONURGENT_NENT)
 
-#define        COOKIE2MCTE(c)          ((struct mctelem_ent *)(c))
-#define        MCTE2COOKIE(tep)        ((mctelem_cookie_t)(tep))
+#define        COOKIE2MCTE(c)          (c)
+#define        MCTE2COOKIE(tep)        (tep)
 
 static struct mc_telem_ctl {
        /* Linked lists that thread the array members together.
diff --git a/xen/arch/x86/cpu/mcheck/mctelem.h 
b/xen/arch/x86/cpu/mcheck/mctelem.h
index f4c5ff848d..31d02d9f88 100644
--- a/xen/arch/x86/cpu/mcheck/mctelem.h
+++ b/xen/arch/x86/cpu/mcheck/mctelem.h
@@ -52,7 +52,7 @@
  * the element from the processing list.
  */
 
-typedef struct mctelem_cookie *mctelem_cookie_t;
+typedef struct mctelem_ent *mctelem_cookie_t;
 
 typedef enum mctelem_class {
     MC_URGENT,
--
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