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authorGerald Schaefer <gerald.schaefer@de.ibm.com>2014-01-16 16:54:48 +0100
committerDavid S. Miller <davem@davemloft.net>2014-01-17 17:52:22 -0800
commitc196403b79aa241c3fefb3ee5bb328aa7c5cc860 (patch)
tree830220eb7bf83f185c8c611d7154b86bf4bb2138
parent8c12ec741174668d80d7301c298d1d183f92b937 (diff)
downloadlinux-c196403b79aa241c3fefb3ee5bb328aa7c5cc860.tar.gz
net: rds: fix per-cpu helper usage
commit ae4b46e9d "net: rds: use this_cpu_* per-cpu helper" broke per-cpu handling for rds. chpfirst is the result of __this_cpu_read(), so it is an absolute pointer and not __percpu. Therefore, __this_cpu_write() should not operate on chpfirst, but rather on cache->percpu->first, just like __this_cpu_read() did before. Cc: <stable@vger.kernel.org> # 3.8+ Signed-off-byd Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/rds/ib_recv.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
index 8eb9501e3d6..b7ebe23cded 100644
--- a/net/rds/ib_recv.c
+++ b/net/rds/ib_recv.c
@@ -421,8 +421,7 @@ static void rds_ib_recv_cache_put(struct list_head *new_item,
struct rds_ib_refill_cache *cache)
{
unsigned long flags;
- struct list_head *old;
- struct list_head __percpu *chpfirst;
+ struct list_head *old, *chpfirst;
local_irq_save(flags);
@@ -432,7 +431,7 @@ static void rds_ib_recv_cache_put(struct list_head *new_item,
else /* put on front */
list_add_tail(new_item, chpfirst);
- __this_cpu_write(chpfirst, new_item);
+ __this_cpu_write(cache->percpu->first, new_item);
__this_cpu_inc(cache->percpu->count);
if (__this_cpu_read(cache->percpu->count) < RDS_IB_RECYCLE_BATCH_COUNT)
@@ -452,7 +451,7 @@ static void rds_ib_recv_cache_put(struct list_head *new_item,
} while (old);
- __this_cpu_write(chpfirst, NULL);
+ __this_cpu_write(cache->percpu->first, NULL);
__this_cpu_write(cache->percpu->count, 0);
end:
local_irq_restore(flags);