[xen staging] x86/irq: introduce local irq_desc

[patchbot@xxxxxxx]

commit c2d6dc7c68e3c986614fcc7c814e1794aef4905a
Author:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Sun Oct 19 18:02:24 2025 +0200
Commit:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
CommitDate: Wed Nov 26 09:46:17 2025 +0100

    x86/irq: introduce local irq_desc
    
    Avoid duplicated calls to irq_to_desc() by storing the result in a local
    variable.  No functional change.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/smpboot.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
index 8d3161248d..7fab555233 100644
--- a/xen/arch/x86/smpboot.c
+++ b/xen/arch/x86/smpboot.c
@@ -1455,12 +1455,16 @@ void __init smp_intr_init(void)
      */
     for ( seridx = 0; seridx <= SERHND_IDX; seridx++ )
     {
+        struct irq_desc *desc;
+
         if ( (irq = serial_irq(seridx)) < 0 )
             continue;
         vector = alloc_hipriority_vector();
         per_cpu(vector_irq, cpu)[vector] = irq;
-        irq_to_desc(irq)->arch.vector = vector;
-        cpumask_copy(irq_to_desc(irq)->arch.cpu_mask, &cpu_online_map);
+
+        desc = irq_to_desc(irq);
+        desc->arch.vector = vector;
+        cpumask_copy(desc->arch.cpu_mask, &cpu_online_map);
     }
 
     /* Direct IPI vectors. */
--
generated by git-patchbot for /home/xen/git/xen.git#staging