list: Use WRITE_ONCE() when adding to lists and hlists

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Code that does lockless emptiness testing of non-RCU lists is relying
on the list-addition code to write the list head's ->next pointer
atomically.  This commit therefore adds WRITE_ONCE() to list-addition
pointer stores that could affect the head's ->next pointer.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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This commit is contained in:

Paul E. McKenney 2015-09-20 22:02:17 -07:00

parent 6cf1008122

commit 1c97be677f

2 changed files with 5 additions and 5 deletions

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8

include/linux/list.h

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2

lib/list_debug.c

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