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| author | Trond Myklebust <trondmy@gmail.com> | 2018-10-01 16:41:45 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2018-10-03 17:54:34 +0200 |
| commit | b92a8fababa9d18910a54b957be55fef7f603531 (patch) | |
| tree | 498ca9d300def4b34ec581463c59c3e395ae9abc /net/sunrpc/cache.c | |
| parent | SUNRPC: Add lockless lookup of the server's auth domain (diff) | |
| download | linux-b92a8fababa9d18910a54b957be55fef7f603531.tar.xz linux-b92a8fababa9d18910a54b957be55fef7f603531.zip | |
SUNRPC: Refactor sunrpc_cache_lookup
This is a trivial split into lookup and insert functions, no change in
behavior.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/cache.c')
| -rw-r--r-- | net/sunrpc/cache.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index 109fbe591e7b..aa8e62d61f4d 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -54,13 +54,11 @@ static void cache_init(struct cache_head *h, struct cache_detail *detail) h->last_refresh = now; } -struct cache_head *sunrpc_cache_lookup(struct cache_detail *detail, - struct cache_head *key, int hash) +static struct cache_head *sunrpc_cache_find(struct cache_detail *detail, + struct cache_head *key, int hash) { - struct cache_head *new = NULL, *freeme = NULL, *tmp = NULL; - struct hlist_head *head; - - head = &detail->hash_table[hash]; + struct hlist_head *head = &detail->hash_table[hash]; + struct cache_head *tmp; read_lock(&detail->hash_lock); @@ -75,7 +73,15 @@ struct cache_head *sunrpc_cache_lookup(struct cache_detail *detail, } } read_unlock(&detail->hash_lock); - /* Didn't find anything, insert an empty entry */ + return NULL; +} + +static struct cache_head *sunrpc_cache_add_entry(struct cache_detail *detail, + struct cache_head *key, + int hash) +{ + struct cache_head *new, *tmp, *freeme = NULL; + struct hlist_head *head = &detail->hash_table[hash]; new = detail->alloc(); if (!new) @@ -114,8 +120,19 @@ struct cache_head *sunrpc_cache_lookup(struct cache_detail *detail, cache_put(freeme, detail); return new; } -EXPORT_SYMBOL_GPL(sunrpc_cache_lookup); +struct cache_head *sunrpc_cache_lookup(struct cache_detail *detail, + struct cache_head *key, int hash) +{ + struct cache_head *ret; + + ret = sunrpc_cache_find(detail, key, hash); + if (ret) + return ret; + /* Didn't find anything, insert an empty entry */ + return sunrpc_cache_add_entry(detail, key, hash); +} +EXPORT_SYMBOL_GPL(sunrpc_cache_lookup); static void cache_dequeue(struct cache_detail *detail, struct cache_head *ch); |