x86/paravirt: add register-saving thunks to reduce caller register pressure

[karo-tx-linux.git] / arch / x86 / xen / irq.c

diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c
index 2e8271431e1af6c7d5ec0f27777c6ffb1b70a73a..5a070900ad3517dacd26f1c14a5aa65ddcaf8295 100644 (file)
--- a/arch/x86/xen/irq.c
+++ b/arch/x86/xen/irq.c
@@ -50,6 +50,7 @@ static unsigned long xen_save_fl(void)
        */
        return (-flags) & X86_EFLAGS_IF;
 }
+PV_CALLEE_SAVE_REGS_THUNK(xen_save_fl);
 
 static void xen_restore_fl(unsigned long flags)
 {
@@ -76,6 +77,7 @@ static void xen_restore_fl(unsigned long flags)
                        xen_force_evtchn_callback();
        }
 }
+PV_CALLEE_SAVE_REGS_THUNK(xen_restore_fl);
 
 static void xen_irq_disable(void)
 {
@@ -86,6 +88,7 @@ static void xen_irq_disable(void)
        percpu_read(xen_vcpu)->evtchn_upcall_mask = 1;
        preempt_enable_no_resched();
 }
+PV_CALLEE_SAVE_REGS_THUNK(xen_irq_disable);
 
 static void xen_irq_enable(void)
 {
@@ -106,6 +109,7 @@ static void xen_irq_enable(void)
        if (unlikely(vcpu->evtchn_upcall_pending))
                xen_force_evtchn_callback();
 }
+PV_CALLEE_SAVE_REGS_THUNK(xen_irq_enable);
 
 static void xen_safe_halt(void)
 {
@@ -124,10 +128,12 @@ static void xen_halt(void)
 
 static const struct pv_irq_ops xen_irq_ops __initdata = {
        .init_IRQ = __xen_init_IRQ,
-       .save_fl = xen_save_fl,
-       .restore_fl = xen_restore_fl,
-       .irq_disable = xen_irq_disable,
-       .irq_enable = xen_irq_enable,
+
+       .save_fl = PV_CALLEE_SAVE(xen_save_fl),
+       .restore_fl = PV_CALLEE_SAVE(xen_restore_fl),
+       .irq_disable = PV_CALLEE_SAVE(xen_irq_disable),
+       .irq_enable = PV_CALLEE_SAVE(xen_irq_enable),
+
        .safe_halt = xen_safe_halt,
        .halt = xen_halt,
 #ifdef CONFIG_X86_64