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IB/ipath: Use bitmap_weight()

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Use bitmap_weight() instead of finding all set bits in bitmap by hand.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Ralph Campbell <infinipath@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Akinobu Mita 2009-12-09 10:05:28 -08:00 committed by Roland Dreier
parent 91d3f9bacd
commit 598cb6f327
1 changed files with 3 additions and 7 deletions
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10
drivers/infiniband/hw/ipath/ipath_driver.c
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@ -39,6 +39,7 @@
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/bitmap.h>
#include "ipath_kernel.h"
#include "ipath_verbs.h"
@ -1697,7 +1698,7 @@ void ipath_chg_pioavailkernel(struct ipath_devdata *dd, unsigned start,
unsigned len, int avail)
{
unsigned long flags;
unsigned end, cnt = 0, next;
unsigned end, cnt = 0;
/* There are two bits per send buffer (busy and generation) */
start *= 2;
@ -1748,12 +1749,7 @@ void ipath_chg_pioavailkernel(struct ipath_devdata *dd, unsigned start,
if (dd->ipath_pioupd_thresh) {
end = 2 * (dd->ipath_piobcnt2k + dd->ipath_piobcnt4k);
next = find_first_bit(dd->ipath_pioavailkernel, end);
while (next < end) {
cnt++;
next = find_next_bit(dd->ipath_pioavailkernel, end,
next + 1);
}
cnt = bitmap_weight(dd->ipath_pioavailkernel, end);
}
spin_unlock_irqrestore(&ipath_pioavail_lock, flags);