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rhashtable: Drop gfp_flags arg in insert/remove functions

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Reallocation is only required for shrinking and expanding and both rely
on a mutex for synchronization and callers of rhashtable_init() are in
non atomic context. Therefore, no reason to continue passing allocation
hints through the API.

Instead, use GFP_KERNEL and add __GFP_NOWARN | __GFP_NORETRY to allow
for silent fall back to vzalloc() without the OOM killer jumping in as
pointed out by Eric Dumazet and Eric W. Biederman.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2014-11-13 13:45:46 +01:00 • committed by David S. Miller
parent 64bb7e9949
commit 6eba82248e
4 changed files with 26 additions and 33 deletions
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10
include/linux/rhashtable.h
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@ -99,16 +99,16 @@ int rhashtable_init(struct rhashtable *ht, struct rhashtable_params *params);
u32 rhashtable_hashfn(const struct rhashtable *ht, const void *key, u32 len);
u32 rhashtable_obj_hashfn(const struct rhashtable *ht, void *ptr);
void rhashtable_insert(struct rhashtable *ht, struct rhash_head *node, gfp_t);
bool rhashtable_remove(struct rhashtable *ht, struct rhash_head *node, gfp_t);
void rhashtable_insert(struct rhashtable *ht, struct rhash_head *node);
bool rhashtable_remove(struct rhashtable *ht, struct rhash_head *node);
void rhashtable_remove_pprev(struct rhashtable *ht, struct rhash_head *obj,
struct rhash_head __rcu **pprev, gfp_t flags);
struct rhash_head __rcu **pprev);
bool rht_grow_above_75(const struct rhashtable *ht, size_t new_size);
bool rht_shrink_below_30(const struct rhashtable *ht, size_t new_size);
int rhashtable_expand(struct rhashtable *ht, gfp_t flags);
int rhashtable_shrink(struct rhashtable *ht, gfp_t flags);
int rhashtable_expand(struct rhashtable *ht);
int rhashtable_shrink(struct rhashtable *ht);
void *rhashtable_lookup(const struct rhashtable *ht, const void *key);
void *rhashtable_lookup_compare(const struct rhashtable *ht, u32 hash,