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

2 files changed, 99 insertions, 90 deletions

diff --git a/drivers/dahdi/dahdi-sysfs.c b/drivers/dahdi/dahdi-sysfs.c
index b3b10d8..d14b15c 100644
--- a/drivers/dahdi/dahdi-sysfs.c
+++ b/drivers/dahdi/dahdi-sysfs.c
@@ -6,37 +6,7 @@
 #include <linux/slab.h>
 
 #include "dahdi.h"
-
-#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
-
-#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
+#include "dahdi-sysfs.h"
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13)
 static struct class *dahdi_class;
@@ -46,65 +16,6 @@ static struct class_simple *dahdi_class;
 #define class_destroy class_simple_destroy
 #endif
 
-/*
- * 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)
-
 
 static char *initdir = "/usr/share/dahdi";
 module_param(initdir, charp, 0644);
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 */