SND_CTL_NEW1(9) Sound Devices SND_CTL_NEW1(9)NAME
snd_ctl_new1 - create a control instance from the template
SYNOPSIS
struct snd_kcontrol * snd_ctl_new1(const struct snd_kcontrol_new * ncontrol, void * private_data);
ARGUMENTS
ncontrol
the initialization record
private_data
the private data to set
DESCRIPTION
Allocates a new struct snd_kcontrol instance and initialize from the given template. When the access field of ncontrol is 0, it's assumed
as READWRITE access. When the count field is 0, it's assumes as one.
Returns the pointer of the newly generated instance, or NULL on failure.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 SND_CTL_NEW1(9)
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DEBUGFS_CREATE_FILE(9) The debugfs filesystem DEBUGFS_CREATE_FILE(9)NAME
debugfs_create_file - create a file in the debugfs filesystem
SYNOPSIS
struct dentry * debugfs_create_file(const char * name, mode_t mode, struct dentry * parent, void * data,
const struct file_operations * fops);
ARGUMENTS
name
a pointer to a string containing the name of the file to create.
mode
the permission that the file should have.
parent
a pointer to the parent dentry for this file. This should be a directory dentry if set. If this paramater is NULL, then the file will
be created in the root of the debugfs filesystem.
data
a pointer to something that the caller will want to get to later on. The inode.i_private pointer will point to this value on the open
call.
fops
a pointer to a struct file_operations that should be used for this file.
DESCRIPTION
This is the basic "create a file" function for debugfs. It allows for a wide range of flexibility in creating a file, or a directory (if
you want to create a directory, the debugfs_create_dir function is recommended to be used instead.)
This function will return a pointer to a dentry if it succeeds. This pointer must be passed to the debugfs_remove function when the file is
to be removed (no automatic cleanup happens if your module is unloaded, you are responsible here.) If an error occurs, NULL will be
returned.
If debugfs is not enabled in the kernel, the value -ENODEV will be returned.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 DEBUGFS_CREATE_FILE(9)
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