From 95fe8d89bb8c9c114ca3e46f8b2457f894f55746 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 2 Aug 2021 17:09:37 +0300 Subject: [PATCH] iwlwifi: pcie: optimise struct iwl_rx_mem_buffer layout On 64-bit machines, struct iwl_rx_mem_buffer has a lot of padding due to the use of pointers after the small items. Move the list entry before them, and while at it also add documentation for it. Signed-off-by: Johannes Berg Signed-off-by: Luca Coelho Link: https://lore.kernel.org/r/iwlwifi.20210802170640.6a62255b3df0.I47bb36530a3c2cdbd73454c796ce608ee2a32a6c@changeid Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/pcie/internal.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h index cc550f6ef957..10d763fc3d50 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h +++ b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h @@ -42,6 +42,7 @@ struct iwl_host_cmd; * struct iwl_rx_mem_buffer * @page_dma: bus address of rxb page * @page: driver's pointer to the rxb page + * @list: list entry for the membuffer * @invalid: rxb is in driver ownership - not owned by HW * @vid: index of this rxb in the global table * @offset: indicates which offset of the page (in bytes) @@ -50,10 +51,10 @@ struct iwl_host_cmd; struct iwl_rx_mem_buffer { dma_addr_t page_dma; struct page *page; - u16 vid; - bool invalid; struct list_head list; u32 offset; + u16 vid; + bool invalid; }; /**