[PATCH 4/5 v2] sunrpc: New helper cache_force_expire for cache cleanup

[Kinglong Mee <kinglongmee-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Using expiry_time force cleanup a cache.

v2, same as v1.

Signed-off-by: Kinglong Mee <kinglongmee-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 include/linux/sunrpc/cache.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 437ddb6..ce75e9c 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -210,6 +210,17 @@ extern int cache_check(struct cache_detail *detail,
 		       struct cache_head *h, struct cache_req *rqstp);
 extern void cache_flush(void);
 extern void cache_purge(struct cache_detail *detail);
+
+static inline void cache_force_expire(struct cache_detail *detail, struct cache_head *h)
+{
+	write_lock(&detail->hash_lock);
+	h->expiry_time = seconds_since_boot() - 1;
+	detail->nextcheck = seconds_since_boot();
+	write_unlock(&detail->hash_lock);
+
+	cache_flush();
+}
+
 #define NEVER (0x7FFFFFFF)
 extern void __init cache_initialize(void);
 extern int cache_register_net(struct cache_detail *cd, struct net *net);
-- 
2.4.1

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