KVM: replace direct irq.h inclusion

virt/kvm/irqchip.c is including "irq.h" from the arch-specific KVM source
directory (i.e. not from arch/*/include) for the sole purpose of retrieving
irqchip_in_kernel.

Making the function inline in a header that is already included,
such as asm/kvm_host.h, is not possible because it needs to look at
struct kvm which is defined after asm/kvm_host.h is included.  So add a
kvm_arch_irqchip_in_kernel non-inline function; irqchip_in_kernel() is
only performance critical on arm64 and x86, and the non-inline function
is enough on all other architectures.

irq.h can then be deleted from all architectures except x86.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c
index f371f1292ca3..d8d50558f165 100644
--- a/arch/x86/kvm/irq.c
+++ b/arch/x86/kvm/irq.c
@@ -165,3 +165,8 @@ bool kvm_arch_irqfd_allowed(struct kvm *kvm, struct kvm_irqfd *args)
 
 	return resample ? irqchip_kernel(kvm) : irqchip_in_kernel(kvm);
 }
+
+bool kvm_arch_irqchip_in_kernel(struct kvm *kvm)
+{
+	return irqchip_in_kernel(kvm);
+}