__round_jiffies_up(9) [suse man page]

__ROUND_JIFFIES_UP(9)						   Driver Basics					     __ROUND_JIFFIES_UP(9)

NAME

       __round_jiffies_up - function to round jiffies up to a full second

SYNOPSIS

       unsigned long __round_jiffies_up(unsigned long j, int cpu);

ARGUMENTS

       j
	   the time in (absolute) jiffies that should be rounded

       cpu
	   the processor number on which the timeout will happen

DESCRIPTION

       This is the same as __round_jiffies except that it will never round down. This is useful for timeouts for which the exact time of firing
       does not matter too much, as long as they don't fire too early.

COPYRIGHT

Kernel Hackers Manual 2.6.					     July 2010						     __ROUND_JIFFIES_UP(9)

STRUCT 
TID_AMPDU_RX(9)						     Internals						    STRUCT TID_AMPDU_RX(9)

NAME

       struct_tid_ampdu_rx - TID aggregation information (Rx).

SYNOPSIS

       struct tid_ampdu_rx {
	 struct rcu_head rcu_head;
	 spinlock_t reorder_lock;
	 struct sk_buff ** reorder_buf;
	 unsigned long * reorder_time;
	 struct timer_list session_timer;
	 struct timer_list reorder_timer;
	 unsigned long last_rx;
	 u16 head_seq_num;
	 u16 stored_mpdu_num;
	 u16 ssn;
	 u16 buf_size;
	 u16 timeout;
	 u8 dialog_token;
       };

MEMBERS

       rcu_head
	   RCU head used for freeing this struct

       reorder_lock
	   serializes access to reorder buffer, see below.

       reorder_buf
	   buffer to reorder incoming aggregated MPDUs

       reorder_time
	   jiffies when skb was added

       session_timer
	   check if peer keeps Tx-ing on the TID (by timeout value)

       reorder_timer
	   releases expired frames from the reorder buffer.

       last_rx
	   jiffies of last rx activity

       head_seq_num
	   head sequence number in reordering buffer.

       stored_mpdu_num
	   number of MPDUs in reordering buffer

       ssn
	   Starting Sequence Number expected to be aggregated.

       buf_size
	   buffer size for incoming A-MPDUs

       timeout
	   reset timer value (in TUs).

       dialog_token
	   dialog token for aggregation session

DESCRIPTION

       This structure's lifetime is managed by RCU, assignments to the array holding it must hold the aggregation mutex.

       The reorder_lock is used to protect the members of this struct, except for timeout, buf_size and dialog_token, which are constant across
       the lifetime of the struct (the dialog token being used only for debugging).

AUTHOR

       Johannes Berg <johannes@sipsolutions.net>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						    STRUCT TID_AMPDU_RX(9)