mem: fix storing old policy

The original code was supposed to overwrite the value pointed to
by the pointer, but the new one is instead overwriting the
pointer value itself, which has no effect outside that function.
Fix it by adding a pointer dereference.

Fixes: 582bed1e1d1d ("mem: support mapping hugepages at runtime")
Cc: stable@dpdk.org
Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>

diff --git a/lib/librte_eal/linuxapp/eal/eal_memalloc.c b/lib/librte_eal/linuxapp/eal/eal_memalloc.c
index 5b421f1..b6fb183 100644 (file)
--- a/lib/librte_eal/linuxapp/eal/eal_memalloc.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memalloc.c
@@ -176,7 +176,7 @@ prepare_numa(int *oldpolicy, struct bitmask *oldmask, int socket_id)
                RTE_LOG(ERR, EAL,
                        "Failed to get current mempolicy: %s. "
                        "Assuming MPOL_DEFAULT.\n", strerror(errno));
-               oldpolicy = MPOL_DEFAULT;
+               *oldpolicy = MPOL_DEFAULT;
        }
        RTE_LOG(DEBUG, EAL,
                "Setting policy MPOL_PREFERRED for socket %d\n",