From 0a7bcf261ea584c87a9cee4523023fa74168de4a Mon Sep 17 00:00:00 2001 From: Zhu Yi Date: Tue, 24 Jan 2006 16:37:28 +0800 Subject: [PATCH] ipw2200: stack reduction Checking the stack usage of my kernel, showed that ipw2200 had a few bad offenders. This is on i386 32-bit: 0x00002876 ipw_send_associate: 544 0x000028ee ipw_send_associate: 544 0x000027dc ipw_send_scan_request_ext: 520 0x00002864 ipw_set_sensitivity: 520 0x00005eac ipw_set_rsn_capa: 520 The reason is the host_cmd structure is large (500 bytes). All other functions currently using ipw_send_cmd() suffer from the same problem. This patch introduces ipw_send_cmd_simple() for commands with no data transfer, and ipw_send_cmd_pdu() for commands with a data payload and makes the payload a pointer to the buffer passed in from the caller. As an added bonus, the diffstat looks like this: ipw2200.c | 260 +++++++++++++++++++++----------------------------------------- ipw2200.h | 2 2 files changed, 92 insertions(+), 170 deletions(-) and it shrinks the module a lot as well: Before: text data bss dec hex filename 75177 2472 44 77693 12f7d drivers/net/wireless/ipw2200.ko After: text data bss dec hex filename 61363 2488 44 63895 f997 drivers/net/wireless/ipw2200.ko So about a ~18% reduction in module size. Signed-off-by: Jens Axboe Signed-off-by: Zhu Yi Signed-off-by: John W. Linville --- drivers/net/wireless/ipw2200.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/wireless/ipw2200.h') diff --git a/drivers/net/wireless/ipw2200.h b/drivers/net/wireless/ipw2200.h index 04a0c26cab8..c09888b1f1f 100644 --- a/drivers/net/wireless/ipw2200.h +++ b/drivers/net/wireless/ipw2200.h @@ -1866,7 +1866,7 @@ struct host_cmd { u8 cmd; u8 len; u16 reserved; - u32 param[TFD_CMD_IMMEDIATE_PAYLOAD_LENGTH]; + u32 *param; } __attribute__ ((packed)); struct ipw_cmd_log { -- cgit v1.2.3