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| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2014-01-16 16:54:48 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-17 17:52:22 -0800 |
| commit | c196403b79aa241c3fefb3ee5bb328aa7c5cc860 (patch) | |
| tree | 830220eb7bf83f185c8c611d7154b86bf4bb2138 | |
| parent | 8c12ec741174668d80d7301c298d1d183f92b937 (diff) | |
| download | linux-stable-c196403b79aa241c3fefb3ee5bb328aa7c5cc860.tar.gz linux-stable-c196403b79aa241c3fefb3ee5bb328aa7c5cc860.tar.bz2 linux-stable-c196403b79aa241c3fefb3ee5bb328aa7c5cc860.zip | |
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.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c index 8eb9501e3d60..b7ebe23cdedf 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); |