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rhashtable: accept GFP flags in rhashtable_walk_init

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In certain cases, the 802.11 mesh pathtable code wants to
iterate over all of the entries in the forwarding table from
the receive path, which is inside an RCU read-side critical
section.  Enable walks inside atomic sections by allowing
GFP_ATOMIC allocations for the walker state.

Change all existing callsites to pass in GFP_KERNEL.

Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
[also adjust gfs2/glock.c and rhashtable tests]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Bob Copeland
2016-03-02 10:09:19 -05:00
committed by Johannes Berg
parent 947c2a0ecc
commit 8f6fd83c6c
8 changed files with 17 additions and 11 deletions
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3
include/linux/rhashtable.h
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@@ -346,7 +346,8 @@ struct bucket_table *rhashtable_insert_slow(struct rhashtable *ht,
struct bucket_table *old_tbl);
int rhashtable_insert_rehash(struct rhashtable *ht, struct bucket_table *tbl);
int rhashtable_walk_init(struct rhashtable *ht, struct rhashtable_iter *iter);
int rhashtable_walk_init(struct rhashtable *ht, struct rhashtable_iter *iter,
gfp_t gfp);
void rhashtable_walk_exit(struct rhashtable_iter *iter);
int rhashtable_walk_start(struct rhashtable_iter *iter) __acquires(RCU);
void *rhashtable_walk_next(struct rhashtable_iter *iter);