sysfs channels: refactor compat macros

* Refactor all kernel version compatibility macros that relate
  to sysfs and device files to new header: dahdi-sysfs.h
* No functional change.
* Preparing for a refactor channel device file handling into a new
  source file.

Signed-off-by: Oron Peled <oron.peled@xorcom.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Acked-by: Shaun Ruffell <sruffell@digium.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10462 a0bf4364-ded3-4de4-8d8a-66a801d63aff

1 files changed, 98 insertions, 0 deletions

diff --git a/drivers/dahdi/dahdi-sysfs.h b/drivers/dahdi/dahdi-sysfs.h
new file mode 100644
index 0000000..92afbf4
--- /dev/null
+++ b/drivers/dahdi/dahdi-sysfs.h
@@ -0,0 +1,98 @@
+#ifndef	DAHDI_SYSFS_H
+#define	DAHDI_SYSFS_H
+
+/*
+ * Very old hotplug support
+ */
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 9)
+#define	OLD_HOTPLUG_SUPPORT	/* for older kernels */
+#define	OLD_HOTPLUG_SUPPORT_269
+#endif
+
+#ifdef	OLD_HOTPLUG_SUPPORT_269
+/* Copy from new kernels lib/kobject_uevent.c */
+enum kobject_action {
+	KOBJ_ADD,
+	KOBJ_REMOVE,
+	KOBJ_CHANGE,
+	KOBJ_MOUNT,
+	KOBJ_UMOUNT,
+	KOBJ_OFFLINE,
+	KOBJ_ONLINE,
+};
+#endif
+
+/*
+ * Hotplug replaced with uevent in 2.6.16
+ */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
+#define	OLD_HOTPLUG_SUPPORT	/* for older kernels */
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 14)
+#define	DEVICE_ATTR_READER(name, dev, buf) \
+		ssize_t name(struct device *dev, \
+			struct device_attribute *attr, \
+			char *buf)
+#define	DEVICE_ATTR_WRITER(name, dev, buf, count) \
+		ssize_t name(struct device *dev, \
+			struct device_attribute *attr, \
+			const char *buf, size_t count)
+#define BUS_ATTR_READER(name, dev, buf) \
+	ssize_t name(struct device *dev, \
+		struct device_attribute *attr, \
+		char *buf)
+#define BUS_ATTR_WRITER(name, dev, buf, count) \
+		ssize_t name(struct device *dev, \
+			struct device_attribute *attr, \
+			const char *buf, size_t count)
+#else
+#define	DEVICE_ATTR_READER(name, dev, buf)	\
+		ssize_t name(struct device *dev, char *buf)
+#define	DEVICE_ATTR_WRITER(name, dev, buf, count)	\
+		ssize_t name(struct device *dev, const char *buf, size_t count)
+#define BUS_ATTR_READER(name, dev, buf) \
+		ssize_t name(struct device *dev, char *buf)
+#define BUS_ATTR_WRITER(name, dev, buf, count) \
+		ssize_t name(struct device *dev, const char *buf, size_t count)
+#endif
+
+#define	DRIVER_ATTR_READER(name, drv, buf)	\
+		ssize_t name(struct device_driver *drv, char * buf)
+
+/* Device file creation macros */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+#define CLASS_DEV_CREATE(class, devt, device, name) \
+	device_create(class, device, devt, NULL, "%s", name)
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
+#define CLASS_DEV_CREATE(class, devt, device, name) \
+	device_create(class, device, devt, name)
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 15)
+#define CLASS_DEV_CREATE(class, devt, device, name) \
+	class_device_create(class, NULL, devt, device, name)
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13)
+#define CLASS_DEV_CREATE(class, devt, device, name) \
+	class_device_create(class, devt, device, name)
+#else
+#define CLASS_DEV_CREATE(class, devt, device, name) \
+	class_simple_device_add(class, devt, device, name)
+#endif
+
+/* Device file destruction macros */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
+#define CLASS_DEV_DESTROY(class, devt) \
+	device_destroy(class, devt)
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13)
+#define CLASS_DEV_DESTROY(class, devt) \
+	class_device_destroy(class, devt)
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 9)
+#define CLASS_DEV_DESTROY(class, devt) \
+	class_simple_device_remove(devt)
+#else
+#define CLASS_DEV_DESTROY(class, devt) \
+	class_simple_device_remove(class, devt)
+#endif
+
+#endif	/* DAHDI_SYSFS_H */