iio: adc: adc12138: make array ch_to_mux static, makes object code smaller

Don't populate const array ch_to_mux on the stack, instead
make it static. Makes the object code smaller by over 200 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  12663	   1648	    128	  14439	   3867	drivers/iio/adc/ti-adc12138.o

After
   text	   data	    bss	    dec	    hex	filename
  12353	   1744	    128	  14225	   3791	drivers/iio/adc/ti-adc12138.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ti-adc12138.c b/drivers/iio/adc/ti-adc12138.c
index bf890244789afc3955a924ac616f9c393bad262f..703d68ae96b71153413016493f95d4566de1fc8a 100644 (file)
--- a/drivers/iio/adc/ti-adc12138.c
+++ b/drivers/iio/adc/ti-adc12138.c
@@ -164,7 +164,7 @@ static int __adc12138_start_conv(struct adc12138 *adc,
                                 void *data, int len)
 
 {
-       const u8 ch_to_mux[] = { 0, 4, 1, 5, 2, 6, 3, 7 };
+       static const u8 ch_to_mux[] = { 0, 4, 1, 5, 2, 6, 3, 7 };
        u8 mode = (ch_to_mux[channel->channel] << 4) |
                  (channel->differential ? 0 : 0x80);