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wil6210: fix for 64-bit integer division 

On some platforms, cycles_t is 64-bit, and gcc generates call to
__udivdi3 for straight division of cycles_t/cycles_t. This leads
to compilation failure, as this function is not exist in the kernel
runtime. do_div() to rescue

Original report:

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next.git master
head:   2e91606f5e
commit: 7c0acf868d [81/103] wil6210: Tx performance monitoring
config: i386-randconfig-ha3-0620 (attached as .config)

All error/warnings:

   drivers/built-in.o: In function `wil_vring_debugfs_show':
>> debugfs.c:(.text+0x39b9be): undefined reference to `__udivdi3'

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vladimir Kondratiev 2014-06-20 10:05:07 +03:00 committed by John W. Linville
parent 6451acdc4f
commit e48b179090
1 changed files with 3 additions and 2 deletions
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5
drivers/net/wireless/ath/wil6210/debugfs.c
View File

@ -83,9 +83,10 @@ static int wil_vring_debugfs_show(struct seq_file *s, void *data)
char name[10];
/* performance monitoring */
cycles_t now = get_cycles();
cycles_t idle = txdata->idle;
cycles_t idle = txdata->idle * 100;
cycles_t total = now - txdata->begin;
do_div(idle, total);
txdata->begin = now;
txdata->idle = 0ULL;
@ -93,7 +94,7 @@ static int wil_vring_debugfs_show(struct seq_file *s, void *data)
seq_printf(s, "\n%pM CID %d TID %d [%3d|%3d] idle %3d%%\n",
wil->sta[cid].addr, cid, tid, used, avail,
(int)((idle*100)/total));
(int)idle);
wil_print_vring(s, wil, name, vring, '_', 'H');
}