Introduce a handy list_first_entry macro
authorPavel Emelianov <xemul@sw.ru>
Tue, 8 May 2007 07:30:19 +0000 (00:30 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 8 May 2007 18:15:11 +0000 (11:15 -0700)
commitb5e618181a927210f8be1d3d2249d31904ba358d
tree731f1ae4ff1ba56d402bb329182b7d935bb439a1
parentdb9c02fa8bd50eb104781a9f78cae923d8da1e74
Introduce a handy list_first_entry macro

There are many places in the kernel where the construction like

   foo = list_entry(head->next, struct foo_struct, list);

are used.
The code might look more descriptive and neat if using the macro

   list_first_entry(head, type, member) \
             list_entry((head)->next, type, member)

Here is the macro itself and the examples of its usage in the generic code.
 If it will turn out to be useful, I can prepare the set of patches to
inject in into arch-specific code, drivers, networking, etc.

Signed-off-by: Pavel Emelianov <xemul@openvz.org>
Signed-off-by: Kirill Korotaev <dev@openvz.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Zach Brown <zach.brown@oracle.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/dquot.c
fs/eventpoll.c
fs/inode.c
fs/inotify.c
fs/namespace.c
fs/pnode.c
include/linux/list.h
kernel/posix-cpu-timers.c
kernel/timer.c