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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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2
lib/test_rhashtable.c
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@@ -143,7 +143,7 @@ static void test_bucket_stats(struct rhashtable *ht)
struct rhashtable_iter hti;
struct rhash_head *pos;
err = rhashtable_walk_init(ht, &hti);
err = rhashtable_walk_init(ht, &hti, GFP_KERNEL);
if (err) {
pr_warn("Test failed: allocation error");
return;