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[PATCH 1/2] x86/time: address Misra C:2012 rule 8.3


  • To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Thu, 21 May 2026 14:26:54 +0200
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  • Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>, Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
  • Delivery-date: Thu, 21 May 2026 12:26:58 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

Before we can enable scanning of time.c, it needs to be clean wrt blocking
rules. Bring boot_tsc_stamp's definition in line with its declaration. For
get_s_time_fixed() go a little farther and move it to the x86 header (the
function only exists in x86) and do, along with correcting the parameter
name, the u64 -> uint64_t a little more widely than strictly necessary.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/include/asm/time.h
+++ b/xen/arch/x86/include/asm/time.h
@@ -13,6 +13,8 @@ static inline cycles_t get_cycles(void)
     return rdtsc_ordered();
 }
 
+s_time_t get_s_time_fixed(uint64_t at_tsc);
+
 unsigned long
 mktime (unsigned int year, unsigned int mon,
         unsigned int day, unsigned int hour,
--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -95,7 +95,7 @@ static u32 pit_stamp32;
 static bool __read_mostly using_pit;
 
 /* Boot timestamp, filled in head.S */
-u64 __initdata boot_tsc_stamp;
+uint64_t __initdata boot_tsc_stamp;
 
 /* Per-socket TSC_ADJUST values, for secondary cores/threads to sync to. */
 static uint64_t *__read_mostly tsc_adjust;
@@ -1656,10 +1656,10 @@ static unsigned long get_wallclock_time(
  * System Time
  ***************************************************************************/
 
-s_time_t get_s_time_fixed(u64 at_tsc)
+s_time_t get_s_time_fixed(uint64_t at_tsc)
 {
     const struct cpu_time *t = &this_cpu(cpu_time);
-    u64 tsc, delta;
+    uint64_t tsc, delta;
 
     if ( at_tsc )
         tsc = at_tsc;
--- a/xen/include/xen/time.h
+++ b/xen/include/xen/time.h
@@ -33,7 +33,6 @@ struct vcpu;
 typedef int64_t s_time_t;
 #define PRI_stime PRId64
 
-s_time_t get_s_time_fixed(u64 at_tick);
 s_time_t get_s_time(void);
 unsigned long get_localtime(struct domain *d);
 uint64_t get_localtime_us(struct domain *d);




 


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