gnttab_request_free_callback 730 drivers/block/xen-blkfront.c gnttab_request_free_callback( gnttab_request_free_callback 637 drivers/xen/grant-table.c EXPORT_SYMBOL_GPL(gnttab_request_free_callback); gnttab_request_free_callback 127 include/xen/grant_table.h void gnttab_request_free_callback(struct gnttab_free_callback *callback,