From: Kazuhito Hagio <k-hagio-ab@nec.com>

Kernel commit f0dd891dd5a1d ("lib/cpumask: move some one-line wrappers
to header file"), which is contained in Linux 6.0 and later kernels,
inlined alloc_cpumask_var() function.  As a result, the "irq -a" option
fails to determine whether cpumask_var_t is a pointer, and displays
wrong CPU affinity for IRQs:

  crash> irq -a
  IRQ NAME                 AFFINITY
    1 i8042                3
    4 ttyS0               
    8 rtc0                 
    9 acpi                 3
   12 i8042                3
  ...

Use alloc_cpumask_var_node() function symbol instead to fix it.

Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
---
 kernel.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel.c b/kernel.c
index 0d72eaeeb79b..546eed95eebd 100644
--- a/kernel.c
+++ b/kernel.c
@@ -7343,7 +7343,8 @@ generic_get_irq_affinity(int irq)
                tmp_addr = irq_desc_addr + \
                           OFFSET(irq_desc_t_affinity);

-       if (symbol_exists("alloc_cpumask_var")) /* pointer member */
+       if (symbol_exists("alloc_cpumask_var_node") ||
+           symbol_exists("alloc_cpumask_var")) /* pointer member */
                readmem(tmp_addr,KVADDR, &affinity_ptr, sizeof(ulong),
                        "irq_desc affinity", FAULT_ON_ERROR);
        else /* array member */
--
2.31.1