vfs_link – create a new link Synopsis int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry, struct inode **delegated_inode); Arguments old_dentry object to be linked dir new parent new_dentry where to create the new link delegated_inode returns inode needing a delegation break Description The caller must hold dir->i_mutex If vfs_link discovers a delegation on…
vfs_get_link – get symlink body Synopsis const char *vfs_get_link(struct dentry *dentry, struct delayed_call *done); Arguments dentry dentry on which to get symbolic link done caller needs to free returned data with this Description Calls security hook and i_op->get_link on the supplied inode. It does not touch atime. That’s up to the caller if necessary. Does…
vfs_cancel_lock – file byte range unblock lock Synopsis int vfs_cancel_lock(struct file *filp, struct file_lock *fl); Arguments filp The file to apply the unblock to fl The lock to be unblocked Description Used by lock managers to cancel blocked requests Copyright
vfree – release memory allocated by vmalloc Synopsis void vfree(const void *addr); Arguments addr memory base address Description Free the virtually continuous memory area starting at addr, as obtained from vmalloc, vmalloc_32 or __vmalloc. If addr is NULL, no operation is performed. Must not be called in NMI context (strictly speaking, only if we don’t…
verify_bbt_descr – verify the bad block description Synopsis void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd); Arguments mtd MTD device structure bd the table to verify Description This functions performs a few sanity checks on the bad block description table. Author Thomas Gleixner <tglx [at] linutronix.de> Author. Copyright
vbin_printf – Parse a format string and place args’ binary value in a buffer Synopsis int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args); Arguments bin_buf The buffer to place args’ binary value size The size of the buffer(by words(32bits), not characters) fmt The format string to use args Arguments for the format string…
usb_wait_anchor_empty_timeout – wait for an anchor to be unused Synopsis int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor, unsigned int timeout); Arguments anchor the anchor you want to become unused timeout how long you are willing to wait in milliseconds Description Call this is you want to be sure all an anchor’s URBs have finished Return Non-zero if the…
usb_urb_dir_out – check if an URB describes an OUT transfer Synopsis int usb_urb_dir_out(struct urb *urb); Arguments urb URB to be checked Return 1 if urb describes an OUT transfer (host-to-device), otherwise 0. Copyright
usb_urb_dir_in – check if an URB describes an IN transfer Synopsis int usb_urb_dir_in(struct urb *urb); Arguments urb URB to be checked Return 1 if urb describes an IN transfer (device-to-host), otherwise 0. Copyright
usb_unpoison_anchored_urbs – let an anchor be used successfully again Synopsis void usb_unpoison_anchored_urbs(struct usb_anchor *anchor); Arguments anchor anchor the requests are bound to Description Reverses the effect of usb_poison_anchored_urbs the anchor can be used normally after it returns Copyright
usb_unlink_urb – abort/cancel a transfer request for an endpoint Synopsis int usb_unlink_urb(struct urb *urb); Arguments urb pointer to urb describing a previously submitted request, may be NULL Description This routine cancels an in-progress request. URBs complete only once per submission, and may be canceled only once per submission. Successful cancellation means termination of urb will…
usb_unlink_anchored_urbs – asynchronously cancel transfer requests en masse Synopsis void usb_unlink_anchored_urbs(struct usb_anchor *anchor); Arguments anchor anchor the requests are bound to Description this allows all outstanding URBs to be unlinked starting from the back of the queue. This function is asynchronous. The unlinking is just triggered. It may happen after this function has returned. This…
usb_unanchor_urb – unanchors an URB Synopsis void usb_unanchor_urb(struct urb *urb); Arguments urb pointer to the urb to anchor Description Call this to stop the system keeping track of this URB Copyright
usb_submit_urb – issue an asynchronous transfer request for an endpoint Synopsis int usb_submit_urb(struct urb *urb, gfp_t mem_flags); Arguments urb pointer to the urb describing the request mem_flags the type of memory to allocate, see kmalloc for a list of valid options for this. Description This submits a transfer request, and transfers control of the URB…
usb_string_ids_tab – allocate unused string IDs in batch Synopsis int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str); Arguments cdev the device whose string descriptor IDs are being allocated str an array of usb_string objects to assign numbers to Context single threaded during gadget setup Description usb_string_ids() is called from bind callbacks to allocate string IDs. Drivers…
usb_string_ids_n – allocate unused string IDs in batch Synopsis int usb_string_ids_n(struct usb_composite_dev *c, unsigned n); Arguments c the device whose string descriptor IDs are being allocated n number of string IDs to allocate Context single threaded during gadget setup Description Returns the first requested ID. This ID and next n-1 IDs are now valid IDs….
usb_string_id – allocate an unused string ID Synopsis int usb_string_id(struct usb_composite_dev *cdev); Arguments cdev the device whose string descriptor IDs are being allocated Context single threaded during gadget setup Description usb_string_id() is called from bind callbacks to allocate string IDs. Drivers for functions, configurations, or gadgets will then store that ID in the appropriate descriptors…
usb_string – returns UTF-8 version of a string descriptor Synopsis int usb_string(struct usb_device *dev, int index, char *buf, size_t size); Arguments dev the device whose string descriptor is being retrieved index the number of the descriptor buf where to put the string size how big is “buf”? Context !in_interrupt () Description This converts the UTF-16LE…
usb_state_string – Returns human readable name for the state. Synopsis const char *usb_state_string(enum usb_device_state state); Arguments state The state to return a human-readable name for. If it’s not any of the states devices in usb_device_state_string enum, the string UNKNOWN will be returned. Copyright
usb_speed_string – Returns human readable-name of the speed. Synopsis const char *usb_speed_string(enum usb_device_speed speed); Arguments speed The speed to return human-readable name for. If it’s not any of the speeds defined in usb_device_speed enum, string for USB_SPEED_UNKNOWN will be returned. Copyright