| debugfs_create_u64(9) - phpMan
DEBUGFS_CREATE_U64(9) The debugfs filesystem DEBUGFS_CREATE_U64(9)
NAME
debugfs_create_u64 - create a debugfs file that is used to read and write an unsigned
64-bit value
SYNOPSIS
struct dentry * debugfs_create_u64(const char * name, umode_t mode,
struct dentry * parent, u64 * value);
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 parameter is NULL, then the file will be created in the root of the
debugfs filesystem.
value
a pointer to the variable that the file should read to and write from.
DESCRIPTION
This function creates a file in debugfs with the given name that contains the value of the
variable value. If the mode variable is so set, it can be read from, and written to.
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. It is not
wise to check for this value, but rather, check for NULL or !NULL instead as to eliminate
the need for #ifdef in the calling code.
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 DEBUGFS_CREATE_U64(9)
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