list: Use WRITE_ONCE() when initializing list_head structures

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Code that does lockless emptiness testing of non-RCU lists is relying
on INIT_LIST_HEAD() to write the list head's ->next pointer atomically,
particularly when INIT_LIST_HEAD() is invoked from list_del_init().
This commit therefore adds WRITE_ONCE() to this function's pointer stores
that could affect the head's ->next pointer.

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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Paul E. McKenney 2015-10-12 16:56:42 -07:00

parent 7d86dccf28

commit 2f073848c3

1 changed files with 1 additions and 1 deletions

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include/linux/list.h

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