From 62f09c3d321c82981ae3f2dd7e32bc4c73379a7e Mon Sep 17 00:00:00 2001
From: Clemens Ladisch <clemens@ladisch.de>
Date: Mon, 27 Feb 2006 09:53:03 +0100
Subject: [PATCH] [ALSA] usb-audio: optimize snd_usbmidi_count_bits()
Modules: USB generic driver
Reduce the code size of the snd_usbmidi_count_bits() function by using
simpler operations.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
---
sound/usb/usbmidi.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c
index 7580339dba2..2b9d940c806 100644
--- a/sound/usb/usbmidi.c
+++ b/sound/usb/usbmidi.c
@@ -871,10 +871,10 @@ static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi* umidi,
static unsigned int snd_usbmidi_count_bits(unsigned int x)
{
- unsigned int bits = 0;
+ unsigned int bits;
- for (; x; x >>= 1)
- bits += x & 1;
+ for (bits = 0; x; ++bits)
+ x &= x - 1;
return bits;
}
--
2.41.3