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authorRolf Eike Beer <eike-kernel@sf-tec.de>2006-07-14 00:24:23 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-14 21:53:54 -0700
commitd247e2c661f28a21e5f9a8d672e1e88a7c1c5d4a (patch)
treecb202ad2d4f3504ff31bf0e474aae855ac3dd41a
parentc259cc281255bdb30ceba190bfd7f37e3ae3fc85 (diff)
[PATCH] add function documentation for register_chrdev()
Documentation for register_chrdev() was missing completely. [akpm@osdl.org: kerneldocification] Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/char_dev.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/char_dev.c b/fs/char_dev.c
index a4cbc67..3483d3c 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -182,6 +182,28 @@ int alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count,
return 0;
}
+/**
+ * register_chrdev() - Register a major number for character devices.
+ * @major: major device number or 0 for dynamic allocation
+ * @name: name of this range of devices
+ * @fops: file operations associated with this devices
+ *
+ * If @major == 0 this functions will dynamically allocate a major and return
+ * its number.
+ *
+ * If @major > 0 this function will attempt to reserve a device with the given
+ * major number and will return zero on success.
+ *
+ * Returns a -ve errno on failure.
+ *
+ * The name of this device has nothing to do with the name of the device in
+ * /dev. It only helps to keep track of the different owners of devices. If
+ * your module name has only one type of devices it's ok to use e.g. the name
+ * of the module here.
+ *
+ * This function registers a range of 256 minor numbers. The first minor number
+ * is 0.
+ */
int register_chrdev(unsigned int major, const char *name,
const struct file_operations *fops)
{