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Commit 391c72a3 authored by Xenia Ragiadakou's avatar Xenia Ragiadakou Committed by Greg Kroah-Hartman
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staging: rtl8192u: fix bitshift calculation in r819xU_phy.c 



This patch uses the ffs linux built-in routine in the
computation of the bitshift to take advantage of
architecture specific instructions that implement this
computation more efficiently.

Signed-off-by: default avatarXenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 409359a1

drivers/staging/rtl8192u/r819xU_phy.c

+3 −5
Original line number Diff line number Diff line
@@ -7,6 +7,8 @@ 
#include "r819xU_firmware_img.h"



#include "dot11d.h"

#include <linux/bitops.h>



static u32 RF_CHANNEL_TABLE_ZEBRA[] = {

	0,

	0x085c, //2412 1
@@ -45,11 +47,7 @@ static u32 RF_CHANNEL_TABLE_ZEBRA[] = { 
u32 rtl8192_CalculateBitShift(u32 dwBitMask)

{

	u32 i;

	for (i=0; i<=31; i++)

	{

		if (((dwBitMask>>i)&0x1) == 1)

			break;

	}

	i = ffs(dwBitMask) - 1;

	return i;

}

/******************************************************************************