From 82266e98dd4d8e7d5b8e4a0fedeb91f2eb29d306 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Tue, 24 Apr 2018 08:29:13 +1000 Subject: [PATCH] rhashtable: Revise incorrect comment on r{hl, hash}table_walk_enter() Neither rhashtable_walk_enter() or rhltable_walk_enter() sleep, though they do take a spinlock without irq protection. So revise the comments to accurately state the contexts in which these functions can be called. Acked-by: Herbert Xu Signed-off-by: NeilBrown Signed-off-by: David S. Miller --- include/linux/rhashtable.h | 5 +++-- lib/rhashtable.c | 5 +++-- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h index 87d443a..4e1f535 100644 --- a/include/linux/rhashtable.h +++ b/include/linux/rhashtable.h @@ -1268,8 +1268,9 @@ static inline int rhashtable_walk_init(struct rhashtable *ht, * For a completely stable walk you should construct your own data * structure outside the hash table. * - * This function may sleep so you must not call it from interrupt - * context or with spin locks held. + * This function may be called from any process context, including + * non-preemptable context, but cannot be called from softirq or + * hardirq context. * * You must call rhashtable_walk_exit after this function returns. */ diff --git a/lib/rhashtable.c b/lib/rhashtable.c index 2b2b799..6d490f5 100644 --- a/lib/rhashtable.c +++ b/lib/rhashtable.c @@ -668,8 +668,9 @@ EXPORT_SYMBOL_GPL(rhashtable_insert_slow); * For a completely stable walk you should construct your own data * structure outside the hash table. * - * This function may sleep so you must not call it from interrupt - * context or with spin locks held. + * This function may be called from any process context, including + * non-preemptable context, but cannot be called from softirq or + * hardirq context. * * You must call rhashtable_walk_exit after this function returns. */ -- 2.7.4