From: Kazuhito Hagio <k-hagio-ab(a)nec.com&gt; 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(a)nec.com&gt; --- 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