[PATCH v8 16/25] alpha/PCI: Add static PCI resource attribute macros

Add macros for declaring static binary attributes for Alpha's PCI
resource files:

  - pci_dev_resource_attr(),        for dense/BWX systems (mmap dense)
  - pci_dev_resource_sparse_attr(), for sparse systems (mmap sparse)
  - pci_dev_resource_dense_attr(),  for dense companion files (mmap dense)

Each macro creates a const bin_attribute with the BAR index stored in
the .private property and the appropriate .mmap callback.

Tested-by: Magnus Lindholm <[email protected]>
Tested-by: Shivaprasad G Bhat <[email protected]>
Acked-by: Magnus Lindholm <[email protected]>
Signed-off-by: Krzysztof Wilczyński <[email protected]>
---
 arch/alpha/kernel/pci-sysfs.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c
index 6cf688621ea9..650f7795cc40 100644
--- a/arch/alpha/kernel/pci-sysfs.c
+++ b/arch/alpha/kernel/pci-sysfs.c
@@ -104,6 +104,26 @@ static int pci_mmap_resource_dense(struct file *filp, struct kobject *kobj,
 	return pci_mmap_resource(kobj, attr, vma, 0);
 }
 
+#define __pci_dev_resource_attr(_suffix, _bar, _name, _mmap)	\
+static const struct bin_attribute				\
+pci_dev_resource##_bar##_suffix##_attr = {			\
+	.attr = { .name = __stringify(_name), .mode = 0600 },	\
+	.private = (void *)(unsigned long)(_bar),		\
+	.mmap = (_mmap),					\
+}
+
+#define pci_dev_resource_attr(_bar)			\
+	__pci_dev_resource_attr(, _bar, resource##_bar,	\
+				pci_mmap_resource_dense)
+
+#define pci_dev_resource_sparse_attr(_bar)				\
+	__pci_dev_resource_attr(_sparse, _bar, resource##_bar##_sparse,	\
+				pci_mmap_resource_sparse)
+
+#define pci_dev_resource_dense_attr(_bar)				\
+	__pci_dev_resource_attr(_dense, _bar, resource##_bar##_dense,	\
+				pci_mmap_resource_dense)
+
 /**
  * pci_remove_resource_files - cleanup resource files
  * @pdev: pci_dev to cleanup
-- 
2.54.0