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| author | NeilBrown <neilb@suse.com> | 2018-06-18 12:52:50 +1000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-06-22 13:43:27 +0900 |
| commit | 9f9a707738aa7a8b9f78a641b83927ada256a626 (patch) | |
| tree | bc5635cd713869c628fd43e18f7334bbb6bb6aeb /lib/test_rhashtable.c | |
| parent | 0eb71a9da5796851fa87ddc1a534066c0fe54055 (diff) | |
| download | linux-stable-9f9a707738aa7a8b9f78a641b83927ada256a626.tar.gz linux-stable-9f9a707738aa7a8b9f78a641b83927ada256a626.tar.bz2 linux-stable-9f9a707738aa7a8b9f78a641b83927ada256a626.zip | |
rhashtable: remove nulls_base and related code.
This "feature" is unused, undocumented, and untested and so doesn't
really belong. A patch is under development to properly implement
support for detecting when a search gets diverted down a different
chain, which the common purpose of nulls markers.
This patch actually fixes a bug too. The table resizing allows a
table to grow to 2^31 buckets, but the hash is truncated to 27 bits -
any growth beyond 2^27 is wasteful an ineffective.
This patch results in NULLS_MARKER(0) being used for all chains,
and leaves the use of rht_is_a_null() to test for it.
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/test_rhashtable.c')
| -rw-r--r-- | lib/test_rhashtable.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/lib/test_rhashtable.c b/lib/test_rhashtable.c index 6ca59ffcacbe..82ac39ce5310 100644 --- a/lib/test_rhashtable.c +++ b/lib/test_rhashtable.c @@ -83,7 +83,7 @@ static u32 my_hashfn(const void *data, u32 len, u32 seed) { const struct test_obj_rhl *obj = data; - return (obj->value.id % 10) << RHT_HASH_RESERVED_SPACE; + return (obj->value.id % 10); } static int my_cmpfn(struct rhashtable_compare_arg *arg, const void *obj) @@ -99,7 +99,6 @@ static struct rhashtable_params test_rht_params = { .key_offset = offsetof(struct test_obj, value), .key_len = sizeof(struct test_obj_val), .hashfn = jhash, - .nulls_base = (3U << RHT_BASE_SHIFT), }; static struct rhashtable_params test_rht_params_dup = { @@ -296,8 +295,6 @@ static int __init test_rhltable(unsigned int entries) if (!obj_in_table) goto out_free; - /* nulls_base not supported in rhlist interface */ - test_rht_params.nulls_base = 0; err = rhltable_init(&rhlt, &test_rht_params); if (WARN_ON(err)) goto out_free; |