1 files changed, 5 insertions, 17 deletions

diff --git a/drivers/isdn/mISDN/dsp_audio.c b/drivers/isdn/mISDN/dsp_audio.c
index 06022952a437..bbef98e7a16e 100644
--- a/drivers/isdn/mISDN/dsp_audio.c
+++ b/drivers/isdn/mISDN/dsp_audio.c
@@ -13,6 +13,7 @@
 #include <linux/mISDNif.h>
 #include <linux/mISDNdsp.h>
 #include <linux/export.h>
+#include <linux/bitrev.h>
 #include "core.h"
 #include "dsp.h"
 
@@ -137,27 +138,14 @@ static unsigned char linear2ulaw(short sample)
         return ulawbyte;
 }
 
-static int reverse_bits(int i)
-{
-        int z, j;
-        z = 0;
-
-        for (j = 0; j < 8; j++) {
-                if ((i & (1 << j)) != 0)
-                        z |= 1 << (7 - j);
-        }
-        return z;
-}
-
-
 void dsp_audio_generate_law_tables(void)
 {
         int i;
         for (i = 0; i < 256; i++)
-                dsp_audio_alaw_to_s32[i] = alaw2linear(reverse_bits(i));
+                dsp_audio_alaw_to_s32[i] = alaw2linear(bitrev8((u8)i));
 
         for (i = 0; i < 256; i++)
-                dsp_audio_ulaw_to_s32[i] = ulaw2linear(reverse_bits(i));
+                dsp_audio_ulaw_to_s32[i] = ulaw2linear(bitrev8((u8)i));
 
         for (i = 0; i < 256; i++) {
                 dsp_audio_alaw_to_ulaw[i] =
@@ -176,13 +164,13 @@ dsp_audio_generate_s2law_table(void)
                 /* generating ulaw-table */
                 for (i = -32768; i < 32768; i++) {
                         dsp_audio_s16_to_law[i & 0xffff] =
-                                reverse_bits(linear2ulaw(i));
+                                bitrev8(linear2ulaw(i));
                 }
         } else {
                 /* generating alaw-table */
                 for (i = -32768; i < 32768; i++) {
                         dsp_audio_s16_to_law[i & 0xffff] =
-                                reverse_bits(linear2alaw(i));
+                                bitrev8(linear2alaw(i));
                 }
         }
 }