Commit 008208c6 authored by Oleg Nesterov's avatar Oleg Nesterov Committed by Linus Torvalds
Browse files

list: introduce list_next_entry() and list_prev_entry() 



Add two trivial helpers list_next_entry() and list_prev_entry(), they
can have a lot of users including list.h itself.  In fact the 1st one is
already defined in events/core.c and bnx2x_sp.c, so the patch simply
moves the definition to list.h.

Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
Cc: Eilon Greenstein <eilong@broadcom.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 92a2e1cb

drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c

+0 −3
Original line number Diff line number Diff line
@@ -1217,9 +1217,6 @@ static void bnx2x_set_one_vlan_mac_e1h(struct bnx2x *bp, 
				     ETH_VLAN_FILTER_CLASSIFY, config);

}



#define list_next_entry(pos, member) \

	list_entry((pos)->member.next, typeof(*(pos)), member)



/**

 * bnx2x_vlan_mac_restore - reconfigure next MAC/VLAN/VLAN-MAC element

 *

include/linux/list.h

+16 −0
Original line number Diff line number Diff line
@@ -372,6 +372,22 @@ static inline void list_splice_tail_init(struct list_head *list, 
#define list_first_entry_or_null(ptr, type, member) \

	(!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL)



/**

 * list_next_entry - get the next element in list

 * @pos:	the type * to cursor

 * @member:	the name of the list_struct within the struct.

 */

#define list_next_entry(pos, member) \

	list_entry((pos)->member.next, typeof(*(pos)), member)



/**

 * list_prev_entry - get the prev element in list

 * @pos:	the type * to cursor

 * @member:	the name of the list_struct within the struct.

 */

#define list_prev_entry(pos, member) \

	list_entry((pos)->member.prev, typeof(*(pos)), member)



/**

 * list_for_each	-	iterate over a list

 * @pos:	the &struct list_head to use as a loop cursor.

kernel/events/core.c

+0 −3
Original line number Diff line number Diff line
@@ -2234,9 +2234,6 @@ static void __perf_event_sync_stat(struct perf_event *event, 
	perf_event_update_userpage(next_event);

}



#define list_next_entry(pos, member) \

	list_entry(pos->member.next, typeof(*pos), member)



static void perf_event_sync_stat(struct perf_event_context *ctx,

				   struct perf_event_context *next_ctx)

{

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