[PATCH] for_each_possible_cpu: network codes

for_each_cpu() actually iterates across all possible CPUs.  We've had mistakes
in the past where people were using for_each_cpu() where they should have been
iterating across only online or present CPUs.  This is inefficient and
possibly buggy.

We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the
future.

This patch replaces for_each_cpu with for_each_possible_cpu under /net

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

4 files changed, 6 insertions, 6 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 2731570eba5b..83231a27ae02 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3346,7 +3346,7 @@ static int __init net_dev_init(void)
          *      Initialise the packet receive queues.
          */
 
-        for_each_cpu(i) {
+        for_each_possible_cpu(i) {
                 struct softnet_data *queue;
 
                 queue = &per_cpu(softnet_data, i);
diff --git a/net/core/flow.c b/net/core/flow.c
index 885a2f655db0..2191af5f26ac 100644
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -79,7 +79,7 @@ static void flow_cache_new_hashrnd(unsigned long arg)
 {
         int i;
 
-        for_each_cpu(i)
+        for_each_possible_cpu(i)
                 flow_hash_rnd_recalc(i) = 1;
 
         flow_hash_rnd_timer.expires = jiffies + FLOW_HASH_RND_PERIOD;
@@ -361,7 +361,7 @@ static int __init flow_cache_init(void)
         flow_hash_rnd_timer.expires = jiffies + FLOW_HASH_RND_PERIOD;
         add_timer(&flow_hash_rnd_timer);
 
-        for_each_cpu(i)
+        for_each_possible_cpu(i)
                 flow_cache_cpu_prepare(i);
 
         hotcpu_notifier(flow_cache_cpu, 0);
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 2ec8693fb778..4cf878efdb49 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1627,7 +1627,7 @@ static int neightbl_fill_info(struct neigh_table *tbl, struct sk_buff *skb,
 
                 memset(&ndst, 0, sizeof(ndst));
 
-                for_each_cpu(cpu) {
+                for_each_possible_cpu(cpu) {
                         struct neigh_statistics *st;
 
                         st = per_cpu_ptr(tbl->stats, cpu);
diff --git a/net/core/utils.c b/net/core/utils.c
index fdc4f38bc46c..4f96f389243d 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -121,7 +121,7 @@ void __init net_random_init(void)
 {
         int i;
 
-        for_each_cpu(i) {
+        for_each_possible_cpu(i) {
                 struct nrnd_state *state = &per_cpu(net_rand_state,i);
                 __net_srandom(state, i+jiffies);
         }
@@ -133,7 +133,7 @@ static int net_random_reseed(void)
         unsigned long seed[NR_CPUS];
 
         get_random_bytes(seed, sizeof(seed));
-        for_each_cpu(i) {
+        for_each_possible_cpu(i) {
                 struct nrnd_state *state = &per_cpu(net_rand_state,i);
                 __net_srandom(state, seed[i]);
         }