Commit 65b4eb9f3d1e for kernel

commit 65b4eb9f3d1e037100b157e023f4d3d988aafd29
Author: Yevgeny Kliteynik <kliteyn@nvidia.com>
Date:   Tue Oct 15 12:32:01 2024 +0300

    net/mlx5: HWS, removed wrong access to a number of rules variable

    Removed wrong access to the num_of_rules field of the matcher.
    This is a usual u32 variable, but the access was as if it was atomic.

    This fixes the following CI warnings:
      mlx5hws_bwc.c:708:17: warning: large atomic operation may incur significant performance penalty;
      the access size (4 bytes) exceeds the max lock-free size (0 bytes) [-Watomic-alignment]

    Fixes: 510f9f61a112 ("net/mlx5: HWS, added API and enabled HWS support")
    Reported-by: kernel test robot <lkp@intel.com>
    Closes: https://lore.kernel.org/oe-kbuild-all/202409291101.6NdtMFVC-lkp@intel.com/
    Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
    Reviewed-by: Itamar Gozlan <igozlan@nvidia.com>
    Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
    Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_bwc.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_bwc.c
index bd52b05db367..8f3a6f9d703d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_bwc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_bwc.c
@@ -691,7 +691,6 @@ static int hws_bwc_matcher_move(struct mlx5hws_bwc_matcher *bwc_matcher)
 static int
 hws_bwc_matcher_rehash_size(struct mlx5hws_bwc_matcher *bwc_matcher)
 {
-	u32 num_of_rules;
 	int ret;

 	/* If the current matcher size is already at its max size, we can't
@@ -705,8 +704,7 @@ hws_bwc_matcher_rehash_size(struct mlx5hws_bwc_matcher *bwc_matcher)
 	 * Need to check again if we really need rehash.
 	 * If the reason for rehash was size, but not any more - skip rehash.
 	 */
-	num_of_rules = __atomic_load_n(&bwc_matcher->num_of_rules, __ATOMIC_RELAXED);
-	if (!hws_bwc_matcher_rehash_size_needed(bwc_matcher, num_of_rules))
+	if (!hws_bwc_matcher_rehash_size_needed(bwc_matcher, bwc_matcher->num_of_rules))
 		return 0;

 	/* Now we're done all the checking - do the rehash: