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mac80211: optimise station flags

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The flaglock in struct sta_info has long been
something that I wanted to get rid of, this
finally does the conversion to atomic bitops.

The conversion itself is straight-forward in
most places, a few things needed to change a
bit since we can no longer use multiple bits
at the same time.

On x86-64, this is a fairly significant code
size reduction:
   text	   data	    bss	    dec	    hex
 427861	  23648	   1008	 452517	  6e7a5	before
 425383	  23648	    976	 450007	  6ddd7	after

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2011-09-29 16:04:36 +02:00 • committed by John W. Linville
parent deeaee197b
commit c2c98fdeb5
18 changed files with 173 additions and 194 deletions
Download patch file Download diff file Expand all files Collapse all files

20
net/mac80211/debugfs_sta.c
View file

@ -58,17 +58,17 @@ static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
{
char buf[100];
struct sta_info *sta = file->private_data;
u32 staflags = get_sta_flags(sta);
int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "",
staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "",
staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
staflags & WLAN_STA_WME ? "WME\n" : "",
staflags & WLAN_STA_WDS ? "WDS\n" : "",
staflags & WLAN_STA_MFP ? "MFP\n" : "");
test_sta_flag(sta, WLAN_STA_AUTH) ? "AUTH\n" : "",
test_sta_flag(sta, WLAN_STA_ASSOC) ? "ASSOC\n" : "",
test_sta_flag(sta, WLAN_STA_PS_STA) ? "PS (sta)\n" : "",
test_sta_flag(sta, WLAN_STA_PS_DRIVER) ? "PS (driver)\n" : "",
test_sta_flag(sta, WLAN_STA_AUTHORIZED) ? "AUTHORIZED\n" : "",
test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE) ? "SHORT PREAMBLE\n" : "",
test_sta_flag(sta, WLAN_STA_WME) ? "WME\n" : "",
test_sta_flag(sta, WLAN_STA_WDS) ? "WDS\n" : "",
test_sta_flag(sta, WLAN_STA_MFP) ? "MFP\n" : "");
return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
STA_OPS(flags);