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[02/18] wifi: iwlwifi: mvm: align reorder buffer entries to cacheline

Message ID 20240703125541.3bc7a55ac867.Id3c1df6d40e92c3de9caededcbc32d0e57e4423d@changeid (mailing list archive)
State Accepted
Delegated to: Johannes Berg
Headers show
Series wifi: iwlwifi: updates - 03-07-2024 | expand

Commit Message

Korenblit, Miriam Rachel July 3, 2024, 9:58 a.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

The entries[] array needs to be cacheline aligned to avoid false
sharing between different queues, each queue has a set of entries
in it that it writes to.

While it is aligned in practice today given that each array entry
before it is aligned, it's still clearer to explicitly require it
to be aligned, so add the annotation for that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 227463522b7c..056fdc42e253 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -798,7 +798,7 @@  struct iwl_mvm_baid_data {
 	struct iwl_mvm_baid_data __rcu **rcu_ptr;
 	struct iwl_mvm *mvm;
 	struct iwl_mvm_reorder_buffer reorder_buf[IWL_MAX_RX_HW_QUEUES];
-	struct iwl_mvm_reorder_buf_entry entries[];
+	struct iwl_mvm_reorder_buf_entry entries[] ____cacheline_aligned_in_smp;
 };
 
 static inline struct iwl_mvm_baid_data *