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From: Tyler Retzlaff <roretzla@linux.microsoft.com>
To: dev@dpdk.org
Cc: Honnappa.Nagarahalli@arm.com, Ruifeng.Wang@arm.com, thomas@monjalon.net,
pbhagavatula@marvell.com, ndabilpuram@marvell.com,
Tyler Retzlaff <roretzla@linux.microsoft.com>
Subject: [PATCH v3 12/16] bbdev: use previous value atomic fetch operations
Date: Mon, 20 Mar 2023 12:00:32 -0700
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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>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
---
lib/bbdev/rte_bbdev.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/bbdev/rte_bbdev.c b/lib/bbdev/rte_bbdev.c
index 1521cdb..9df0837 100644
--- a/lib/bbdev/rte_bbdev.c
+++ b/lib/bbdev/rte_bbdev.c
@@ -250,8 +250,8 @@ struct rte_bbdev *
}
/* clear shared BBDev Data if no process is using the device anymore */
- if (__atomic_sub_fetch(&bbdev->data->process_cnt, 1,
- __ATOMIC_RELAXED) == 0)
+ if (__atomic_fetch_sub(&bbdev->data->process_cnt, 1,
+ __ATOMIC_RELAXED) - 1 == 0)
memset(bbdev->data, 0, sizeof(*bbdev->data));
memset(bbdev, 0, sizeof(*bbdev));
--
1.8.3.1