[PATCH net-next 5/8] net/sched: add const qualifiers to gnet_stats helpers

[Eric Dumazet <edumazet@google.com>]

In preparation of lockless qdisc dumps, add const qualifiers to:

- gnet_stats_add_basic()
- gnet_stats_copy_basic()
- gnet_stats_copy_queue()
- gnet_stats_read_basic()
- ___gnet_stats_copy_basic()

Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 include/net/gen_stats.h | 12 ++++++------
 net/core/gen_stats.c    | 24 ++++++++++++------------
 2 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/include/net/gen_stats.h b/include/net/gen_stats.h
index 7aa2b8e1fb298c4f994a745b114fc4da785ddf4b..6e661b743bc35743de9c211bdf5c24d69be5c0f1 100644
--- a/include/net/gen_stats.h
+++ b/include/net/gen_stats.h
@@ -47,19 +47,19 @@ int gnet_stats_start_copy_compat(struct sk_buff *skb, int type,
 				 int padattr);
 
 int gnet_stats_copy_basic(struct gnet_dump *d,
-			  struct gnet_stats_basic_sync __percpu *cpu,
-			  struct gnet_stats_basic_sync *b, bool running);
+			  const struct gnet_stats_basic_sync __percpu *cpu,
+			  const struct gnet_stats_basic_sync *b, bool running);
 void gnet_stats_add_basic(struct gnet_stats_basic_sync *bstats,
-			  struct gnet_stats_basic_sync __percpu *cpu,
-			  struct gnet_stats_basic_sync *b, bool running);
+			  const struct gnet_stats_basic_sync __percpu *cpu,
+			  const struct gnet_stats_basic_sync *b, bool running);
 int gnet_stats_copy_basic_hw(struct gnet_dump *d,
 			     struct gnet_stats_basic_sync __percpu *cpu,
 			     struct gnet_stats_basic_sync *b, bool running);
 int gnet_stats_copy_rate_est(struct gnet_dump *d,
 			     struct net_rate_estimator __rcu **ptr);
 int gnet_stats_copy_queue(struct gnet_dump *d,
-			  struct gnet_stats_queue __percpu *cpu_q,
-			  struct gnet_stats_queue *q, __u32 qlen);
+			  const struct gnet_stats_queue __percpu *cpu_q,
+			  const struct gnet_stats_queue *q, __u32 qlen);
 void gnet_stats_add_queue(struct gnet_stats_queue *qstats,
 			  const struct gnet_stats_queue __percpu *cpu_q,
 			  const struct gnet_stats_queue *q);
diff --git a/net/core/gen_stats.c b/net/core/gen_stats.c
index 1a2380e74272de8eaf3d4ef453e56105a31e9edf..3b2f9ea2eb072dde792aad5b60cf00dcc2efa76d 100644
--- a/net/core/gen_stats.c
+++ b/net/core/gen_stats.c
@@ -124,7 +124,7 @@ void gnet_stats_basic_sync_init(struct gnet_stats_basic_sync *b)
 EXPORT_SYMBOL(gnet_stats_basic_sync_init);
 
 static void gnet_stats_add_basic_cpu(struct gnet_stats_basic_sync *bstats,
-				     struct gnet_stats_basic_sync __percpu *cpu)
+				     const struct gnet_stats_basic_sync __percpu *cpu)
 {
 	u64 t_bytes = 0, t_packets = 0;
 	int i;
@@ -147,8 +147,8 @@ static void gnet_stats_add_basic_cpu(struct gnet_stats_basic_sync *bstats,
 }
 
 void gnet_stats_add_basic(struct gnet_stats_basic_sync *bstats,
-			  struct gnet_stats_basic_sync __percpu *cpu,
-			  struct gnet_stats_basic_sync *b, bool running)
+			  const struct gnet_stats_basic_sync __percpu *cpu,
+			  const struct gnet_stats_basic_sync *b, bool running)
 {
 	unsigned int start;
 	u64 bytes = 0;
@@ -172,8 +172,8 @@ void gnet_stats_add_basic(struct gnet_stats_basic_sync *bstats,
 EXPORT_SYMBOL(gnet_stats_add_basic);
 
 static void gnet_stats_read_basic(u64 *ret_bytes, u64 *ret_packets,
-				  struct gnet_stats_basic_sync __percpu *cpu,
-				  struct gnet_stats_basic_sync *b, bool running)
+				  const struct gnet_stats_basic_sync __percpu *cpu,
+				  const struct gnet_stats_basic_sync *b, bool running)
 {
 	unsigned int start;
 
@@ -182,7 +182,7 @@ static void gnet_stats_read_basic(u64 *ret_bytes, u64 *ret_packets,
 		int i;
 
 		for_each_possible_cpu(i) {
-			struct gnet_stats_basic_sync *bcpu = per_cpu_ptr(cpu, i);
+			const struct gnet_stats_basic_sync *bcpu = per_cpu_ptr(cpu, i);
 			unsigned int start;
 			u64 bytes, packets;
 
@@ -209,8 +209,8 @@ static void gnet_stats_read_basic(u64 *ret_bytes, u64 *ret_packets,
 
 static int
 ___gnet_stats_copy_basic(struct gnet_dump *d,
-			 struct gnet_stats_basic_sync __percpu *cpu,
-			 struct gnet_stats_basic_sync *b,
+			 const struct gnet_stats_basic_sync __percpu *cpu,
+			 const struct gnet_stats_basic_sync *b,
 			 int type, bool running)
 {
 	u64 bstats_bytes, bstats_packets;
@@ -258,8 +258,8 @@ ___gnet_stats_copy_basic(struct gnet_dump *d,
  */
 int
 gnet_stats_copy_basic(struct gnet_dump *d,
-		      struct gnet_stats_basic_sync __percpu *cpu,
-		      struct gnet_stats_basic_sync *b,
+		      const struct gnet_stats_basic_sync __percpu *cpu,
+		      const struct gnet_stats_basic_sync *b,
 		      bool running)
 {
 	return ___gnet_stats_copy_basic(d, cpu, b, TCA_STATS_BASIC, running);
@@ -385,8 +385,8 @@ EXPORT_SYMBOL(gnet_stats_add_queue);
  */
 int
 gnet_stats_copy_queue(struct gnet_dump *d,
-		      struct gnet_stats_queue __percpu *cpu_q,
-		      struct gnet_stats_queue *q, __u32 qlen)
+		      const struct gnet_stats_queue __percpu *cpu_q,
+		      const struct gnet_stats_queue *q, __u32 qlen)
 {
 	struct gnet_stats_queue qstats = {0};
 
-- 
2.54.0.563.g4f69b47b94-goog