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authorSirshak Das <sirshak.das@arm.com>2018-10-03 22:53:51 +0000
committerDamjan Marion <dmarion@me.com>2018-10-19 07:10:47 +0000
commit2f6d7bb93c157b874efb79a2d1583a4c368bf89a (patch)
tree05dc2867c598cbb8d711f074b4b0eb62dd464f41 /src/vnet/gre
parentbf3443b0f852f5a4c551d12f926defbd047f2161 (diff)
vppinfra: add atomic macros for __sync builtins
This is first part of addition of atomic macros with only macros for __sync builtins. - Based on earlier patch by Damjan (https://gerrit.fd.io/r/#/c/10729/) Additionally - clib_atomic_release macro added and used in the absence of any memory barrier. - clib_atomic_bool_cmp_and_swap added Change-Id: Ie4e48c1e184a652018d1d0d87c4be80ddd180a3b Original-patch-by: Damjan Marion <damarion@cisco.com> Signed-off-by: Sirshak Das <sirshak.das@arm.com> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> Reviewed-by: Ola Liljedahl <ola.liljedahl@arm.com> Reviewed-by: Steve Capper <steve.capper@arm.com>
Diffstat (limited to 'src/vnet/gre')
-rw-r--r--src/vnet/gre/gre.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/vnet/gre/gre.c b/src/vnet/gre/gre.c
index e82befe7918..070c78e8984 100644
--- a/src/vnet/gre/gre.c
+++ b/src/vnet/gre/gre.c
@@ -406,7 +406,7 @@ gre_interface_tx (vlib_main_t * vm,
/* Encap GRE seq# and ERSPAN type II header */
vlib_buffer_advance (b0, -sizeof (erspan_t2_t));
erspan_t2_t *h0 = vlib_buffer_get_current (b0);
- u32 seq_num = clib_smp_atomic_add (&gt0->gre_sn->seq_num, 1);
+ u32 seq_num = clib_atomic_fetch_add (&gt0->gre_sn->seq_num, 1);
u64 hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
h0->seq_num = clib_host_to_net_u32 (seq_num);
h0->t2_u64 = hdr;
@@ -418,7 +418,7 @@ gre_interface_tx (vlib_main_t * vm,
/* Encap GRE seq# and ERSPAN type II header */
vlib_buffer_advance (b1, -sizeof (erspan_t2_t));
erspan_t2_t *h1 = vlib_buffer_get_current (b1);
- u32 seq_num = clib_smp_atomic_add (&gt1->gre_sn->seq_num, 1);
+ u32 seq_num = clib_atomic_fetch_add (&gt1->gre_sn->seq_num, 1);
u64 hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
h1->seq_num = clib_host_to_net_u32 (seq_num);
h1->t2_u64 = hdr;
@@ -473,7 +473,7 @@ gre_interface_tx (vlib_main_t * vm,
/* Encap GRE seq# and ERSPAN type II header */
vlib_buffer_advance (b0, -sizeof (erspan_t2_t));
erspan_t2_t *h0 = vlib_buffer_get_current (b0);
- u32 seq_num = clib_smp_atomic_add (&gt0->gre_sn->seq_num, 1);
+ u32 seq_num = clib_atomic_fetch_add (&gt0->gre_sn->seq_num, 1);
u64 hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
h0->seq_num = clib_host_to_net_u32 (seq_num);
h0->t2_u64 = hdr;