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Fix by removing the usage of fls(). Fixes: 7e73a6e7f12a ('have architectures specify the number of PIRQs a hardware domain gets') Signed-off-by: Roger Pau Monné Acked-by: Andrew Cooper --- xen/arch/x86/io_apic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/x86/io_apic.c b/xen/arch/x86/io_apic.c index d44d2c9a4173..bd5ad61c85e4 100644 --- a/xen/arch/x86/io_apic.c +++ b/xen/arch/x86/io_apic.c @@ -2744,7 +2744,7 @@ void __init ioapic_init(void) unsigned int __hwdom_init arch_hwdom_irqs(const struct domain *d) { - unsigned int n = fls(num_present_cpus()); + unsigned int n = num_present_cpus(); /* Bounding by the domain pirq EOI bitmap capacity. */ const unsigned int max_irqs = min_t(unsigned int, nr_irqs, PAGE_SIZE * BITS_PER_BYTE);