simple_attr_open

Name:simple_attr_open is called by an actual attribute open file operation* to set the attribute specific access operations.

Proto:int simple_attr_open(struct inode *inode, struct file *file, int (*get)(void *, u64 *), u64int (*set)(void *, ), const char *fmt)

Type:int

Parameter:

Type	Parameter	Name
struct inode *	inode
struct file *	file
int (*	get
int (*	set
const char *	fmt

824

attr = Allocation memory

825

If Not attr Then Return -ENOMEM

828

get = get

829

set = set

830

data = s or device private pointer

831

rmat for read operation = fmt

832

mutex_init - initialize the mutex*@mutex: the mutex to be initialized* Initialize the mutex to unlocked state.* It is not allowed to initialize an already locked mutex.( & protects access to these buffers )

834

needed for tty driver, and maybe others = attr

836

Return This is used by subsystems that don't want seekable* file descriptors. The function is not supposed to ever fail, the only* reason it returns an 'int' and not 'void' is so that it can be plugged* directly into file_operations structure.

**Caller**
Name	Describe
unpoison_fops_open
cma_debugfs_fops_open
cma_used_fops_open
cma_maxchunk_fops_open
cma_free_fops_open
cma_alloc_fops_open
fops_errno_open

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