[PATCH 5.15.y 17/18] nfsd: remove nfsd_stats, make th_cnt a global counter

[cel@kernel.org]

From: Josef Bacik <josef@toxicpanda.com>

[ Upstream commit e41ee44cc6a473b1f414031782c3b4283d7f3e5f ]

This is the last global stat, take it out of the nfsd_stats struct and
make it a global part of nfsd, report it the same as always.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/nfsd.h   | 1 +
 fs/nfsd/nfssvc.c | 5 +++--
 fs/nfsd/stats.c  | 3 +--
 fs/nfsd/stats.h  | 6 ------
 4 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index 013bfa24ced2..996f3f62335b 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -69,6 +69,7 @@ extern struct mutex		nfsd_mutex;
 extern spinlock_t		nfsd_drc_lock;
 extern unsigned long		nfsd_drc_max_mem;
 extern unsigned long		nfsd_drc_mem_used;
+extern atomic_t			nfsd_th_cnt;		/* number of available threads */
 
 extern const struct seq_operations nfs_exports_op;
 
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 74d21d2c5396..caf293fc27d2 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -34,6 +34,7 @@
 
 #define NFSDDBG_FACILITY	NFSDDBG_SVC
 
+atomic_t			nfsd_th_cnt = ATOMIC_INIT(0);
 extern struct svc_program	nfsd_program;
 static int			nfsd(void *vrqstp);
 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
@@ -941,7 +942,7 @@ nfsd(void *vrqstp)
 
 	current->fs->umask = 0;
 
-	atomic_inc(&nfsdstats.th_cnt);
+	atomic_inc(&nfsd_th_cnt);
 
 	set_freezable();
 
@@ -965,7 +966,7 @@ nfsd(void *vrqstp)
 		validate_process_creds();
 	}
 
-	atomic_dec(&nfsdstats.th_cnt);
+	atomic_dec(&nfsd_th_cnt);
 
 out:
 	/* Release the thread */
diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
index c21dbd7d0086..6b2135bfb509 100644
--- a/fs/nfsd/stats.c
+++ b/fs/nfsd/stats.c
@@ -27,7 +27,6 @@
 
 #include "nfsd.h"
 
-struct nfsd_stats	nfsdstats;
 struct svc_stat		nfsd_svcstats = {
 	.program	= &nfsd_program,
 };
@@ -47,7 +46,7 @@ static int nfsd_show(struct seq_file *seq, void *v)
 		   percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_WRITE]));
 
 	/* thread usage: */
-	seq_printf(seq, "th %u 0", atomic_read(&nfsdstats.th_cnt));
+	seq_printf(seq, "th %u 0", atomic_read(&nfsd_th_cnt));
 
 	/* deprecated thread usage histogram stats */
 	for (i = 0; i < 10; i++)
diff --git a/fs/nfsd/stats.h b/fs/nfsd/stats.h
index 28f5c720e9b3..9b22b1ae929f 100644
--- a/fs/nfsd/stats.h
+++ b/fs/nfsd/stats.h
@@ -10,12 +10,6 @@
 #include <uapi/linux/nfsd/stats.h>
 #include <linux/percpu_counter.h>
 
-struct nfsd_stats {
-	atomic_t	th_cnt;		/* number of available threads */
-};
-
-extern struct nfsd_stats	nfsdstats;
-
 extern struct svc_stat		nfsd_svcstats;
 
 int nfsd_percpu_counters_init(struct percpu_counter *counters, int num);
-- 
2.45.2