syscore: Pass context data to callbacks

Several drivers can benefit from registering per-instance data along
with the syscore operations. To achieve this, move the modifiable fields
out of the syscore_ops structure and into a separate struct syscore that
can be registered with the framework. Add a void * driver data field for
drivers to store contextual data that will be passed to the syscore ops.

Acked-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index e4560b33b8ad..bed7dc85612e 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -761,7 +761,7 @@ static int acpi_pci_link_resume(struct acpi_pci_link *link)
 	return 0;
 }
 
-static void irqrouter_resume(void)
+static void irqrouter_resume(void *data)
 {
 	struct acpi_pci_link *link;
 
@@ -888,10 +888,14 @@ static int __init acpi_irq_balance_set(char *str)
 
 __setup("acpi_irq_balance", acpi_irq_balance_set);
 
-static struct syscore_ops irqrouter_syscore_ops = {
+static const struct syscore_ops irqrouter_syscore_ops = {
 	.resume = irqrouter_resume,
 };
 
+static struct syscore irqrouter_syscore = {
+	.ops = &irqrouter_syscore_ops,
+};
+
 void __init acpi_pci_link_init(void)
 {
 	if (acpi_noirq)
@@ -904,6 +908,6 @@ void __init acpi_pci_link_init(void)
 		else
 			acpi_irq_balance = 0;
 	}
-	register_syscore_ops(&irqrouter_syscore_ops);
+	register_syscore(&irqrouter_syscore);
 	acpi_scan_add_handler(&pci_link_handler);
 }