[v2,06/16] net/cnxk: use previous value atomic fetch operations
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Commit Message
Use __atomic_fetch_{add,and,or,sub,xor} instead of
__atomic_{add,and,or,sub,xor}_fetch adding the necessary code to
allow consumption of the resulting value.
Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
Acked-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
---
drivers/net/cnxk/cn10k_tx.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
@@ -108,7 +108,7 @@
retry:
while (__atomic_load_n(&txq->fc_cache_pkts, __ATOMIC_RELAXED) < 0)
;
- cached = __atomic_sub_fetch(&txq->fc_cache_pkts, req, __ATOMIC_ACQUIRE);
+ cached = __atomic_fetch_sub(&txq->fc_cache_pkts, req, __ATOMIC_ACQUIRE) - req;
/* Check if there is enough space, else update and retry. */
if (cached < 0) {
/* Check if we have space else retry. */
@@ -302,7 +302,7 @@
again:
fc_sw = txq->cpt_fc_sw;
- val = __atomic_sub_fetch(fc_sw, nb_pkts, __ATOMIC_RELAXED);
+ val = __atomic_fetch_sub(fc_sw, nb_pkts, __ATOMIC_RELAXED) - nb_pkts;
if (likely(val >= 0))
return;