xen/events: reduce externally visible helper functions

[ Upstream commit 686464514fbebb6c8de4415238319e414c3500a4 ]

get_evtchn_to_irq() has only one external user while irq_from_evtchn()
provides the same functionality and is exported for a wider user base.
Modify the only external user of get_evtchn_to_irq() to use
irq_from_evtchn() instead and make get_evtchn_to_irq() static.

evtchn_from_irq() and irq_from_virq() have a single external user and
can easily be combined to a new helper irq_evtchn_from_virq() allowing
to drop irq_from_virq() and to make evtchn_from_irq() static.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Stable-dep-of: fa765c4b4aed ("xen/events: close evtchn after mapping cleanup")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/xen/events/events_2l.c b/drivers/xen/events/events_2l.c
index b8f2f971c2f0fc6ef6ef3b3e8ab88147b4dc39c3..e3585330cf98b1c7e99a4800913c32cb380fd48f 100644 (file)
--- a/drivers/xen/events/events_2l.c
+++ b/drivers/xen/events/events_2l.c
@@ -171,11 +171,11 @@ static void evtchn_2l_handle_events(unsigned cpu, struct evtchn_loop_ctrl *ctrl)
        int i;
        struct shared_info *s = HYPERVISOR_shared_info;
        struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu);
+       evtchn_port_t evtchn;
 
        /* Timer interrupt has highest priority. */
-       irq = irq_from_virq(cpu, VIRQ_TIMER);
+       irq = irq_evtchn_from_virq(cpu, VIRQ_TIMER, &evtchn);
        if (irq != -1) {
-               evtchn_port_t evtchn = evtchn_from_irq(irq);
                word_idx = evtchn / BITS_PER_LONG;
                bit_idx = evtchn % BITS_PER_LONG;
                if (active_evtchns(cpu, s, word_idx) & (1ULL << bit_idx))
@@ -328,9 +328,9 @@ irqreturn_t xen_debug_interrupt(int irq, void *dev_id)
        for (i = 0; i < EVTCHN_2L_NR_CHANNELS; i++) {
                if (sync_test_bit(i, BM(sh->evtchn_pending))) {
                        int word_idx = i / BITS_PER_EVTCHN_WORD;
-                       printk("  %d: event %d -> irq %d%s%s%s\n",
+                       printk("  %d: event %d -> irq %u%s%s%s\n",
                               cpu_from_evtchn(i), i,
-                              get_evtchn_to_irq(i),
+                              irq_from_evtchn(i),
                               sync_test_bit(word_idx, BM(&v->evtchn_pending_sel))
                               ? "" : " l2-clear",
                               !sync_test_bit(i, BM(sh->evtchn_mask))

diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index cd33a418344a8caa0c2a39ad4f239e93d8a2e9bf..57dfb512cdc5dae68c98461b1ec84dc6fd6bc74e 100644 (file)
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -248,7 +248,7 @@ static int set_evtchn_to_irq(evtchn_port_t evtchn, unsigned int irq)
        return 0;
 }
 
-int get_evtchn_to_irq(evtchn_port_t evtchn)
+static int get_evtchn_to_irq(evtchn_port_t evtchn)
 {
        if (evtchn >= xen_evtchn_max_channels())
                return -1;
@@ -415,7 +415,7 @@ static void xen_irq_info_cleanup(struct irq_info *info)
 /*
  * Accessors for packed IRQ information.
  */
-evtchn_port_t evtchn_from_irq(unsigned irq)
+static evtchn_port_t evtchn_from_irq(unsigned int irq)
 {
        const struct irq_info *info = NULL;
 
@@ -433,9 +433,14 @@ unsigned int irq_from_evtchn(evtchn_port_t evtchn)
 }
 EXPORT_SYMBOL_GPL(irq_from_evtchn);
 
-int irq_from_virq(unsigned int cpu, unsigned int virq)
+int irq_evtchn_from_virq(unsigned int cpu, unsigned int virq,
+                        evtchn_port_t *evtchn)
 {
-       return per_cpu(virq_to_irq, cpu)[virq];
+       int irq = per_cpu(virq_to_irq, cpu)[virq];
+
+       *evtchn = evtchn_from_irq(irq);
+
+       return irq;
 }
 
 static enum ipi_vector ipi_from_irq(unsigned irq)

diff --git a/drivers/xen/events/events_internal.h b/drivers/xen/events/events_internal.h
index 4d3398eff9cdf1567a5f64dcb63561680dda405e..19ae31695edcf1a2e5cc93863c515a61c43496d9 100644 (file)
--- a/drivers/xen/events/events_internal.h
+++ b/drivers/xen/events/events_internal.h
@@ -33,7 +33,6 @@ struct evtchn_ops {
 
 extern const struct evtchn_ops *evtchn_ops;
 
-int get_evtchn_to_irq(evtchn_port_t evtchn);
 void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl);
 
 unsigned int cpu_from_evtchn(evtchn_port_t evtchn);

diff --git a/include/xen/events.h b/include/xen/events.h
index 23932b0673dc7459037c16e97642598a16f08877..7488cd51fbf4f2367bd7301aaf9e4f636186d0cd 100644 (file)
--- a/include/xen/events.h
+++ b/include/xen/events.h
@@ -101,8 +101,8 @@ void xen_poll_irq_timeout(int irq, u64 timeout);
 
 /* Determine the IRQ which is bound to an event channel */
 unsigned int irq_from_evtchn(evtchn_port_t evtchn);
-int irq_from_virq(unsigned int cpu, unsigned int virq);
-evtchn_port_t evtchn_from_irq(unsigned irq);
+int irq_evtchn_from_virq(unsigned int cpu, unsigned int virq,
+                        evtchn_port_t *evtchn);
 
 int xen_set_callback_via(uint64_t via);
 int xen_evtchn_do_upcall(void);