this_cpu: Use this_cpu operations for NFS statistics

Simplify NFS statistics and allow the use of optimized
arch instructions.

Acked-by: Tejun Heo <tj@kernel.org>
CC: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/fs/nfs/iostat.h b/fs/nfs/iostat.h
index ceda50aad73cc5a3bc93baeaaa7771ebd7a0f00f..46d779abafd356e3344ef79c151466dfc863fed5 100644 (file)
--- a/fs/nfs/iostat.h
+++ b/fs/nfs/iostat.h
@@ -25,13 +25,7 @@ struct nfs_iostats {
 static inline void nfs_inc_server_stats(const struct nfs_server *server,
                                        enum nfs_stat_eventcounters stat)
 {
-       struct nfs_iostats *iostats;
-       int cpu;
-
-       cpu = get_cpu();
-       iostats = per_cpu_ptr(server->io_stats, cpu);
-       iostats->events[stat]++;
-       put_cpu();
+       this_cpu_inc(server->io_stats->events[stat]);
 }
 
 static inline void nfs_inc_stats(const struct inode *inode,
@@ -44,13 +38,7 @@ static inline void nfs_add_server_stats(const struct nfs_server *server,
                                        enum nfs_stat_bytecounters stat,
                                        unsigned long addend)
 {
-       struct nfs_iostats *iostats;
-       int cpu;
-
-       cpu = get_cpu();
-       iostats = per_cpu_ptr(server->io_stats, cpu);
-       iostats->bytes[stat] += addend;
-       put_cpu();
+       this_cpu_add(server->io_stats->bytes[stat], addend);
 }
 
 static inline void nfs_add_stats(const struct inode *inode,
@@ -65,13 +53,7 @@ static inline void nfs_add_fscache_stats(struct inode *inode,
                                         enum nfs_stat_fscachecounters stat,
                                         unsigned long addend)
 {
-       struct nfs_iostats *iostats;
-       int cpu;
-
-       cpu = get_cpu();
-       iostats = per_cpu_ptr(NFS_SERVER(inode)->io_stats, cpu);
-       iostats->fscache[stat] += addend;
-       put_cpu();
+       this_cpu_add(NFS_SERVER(inode)->io_stats->fscache[stat], addend);
 }
 #endif