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broken perf tool on 4.5-rc1 #253

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broken perf tool on 4.5-rc1 #253

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6 changes: 4 additions & 2 deletions tools/include/linux/list.h
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Original file line number Diff line number Diff line change
Expand Up @@ -85,8 +85,10 @@ static inline void list_add_tail(struct list_head *new, struct list_head *head)
*/
static inline void __list_del(struct list_head * prev, struct list_head * next)
{
next->prev = prev;
WRITE_ONCE(prev->next, next);
if (next)
next->prev = prev;
if (prev)
WRITE_ONCE(prev->next, next);
}

/**
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