Use shift to increment buf pointer

Use left shift 9 for multiplication by 512.

Signed-off-by: Damien Le Moal <[email protected]>

Author: damien-lemoal

lib/zbc.c

@@ -560,10 +560,10 @@ ssize_t zbc_pread(struct zbc_device *dev, void *buf,
 			return ret ? ret : -EIO;
 		}
 
-		buf += ret * 512;
+		buf += ret << 9;
 		offset += ret;
-		count -=ret;
-		rd_count +=ret;
+		count -= ret;
+		rd_count += ret;
 
 	}
 
@@ -616,10 +616,10 @@ ssize_t zbc_pwrite(struct zbc_device *dev, const void *buf,
 			return ret ? ret : -EIO;
 		}
 
-		buf += ret * 512;
+		buf += ret << 9;
 		offset += ret;
-		count -=ret;
-		wr_count +=ret;
+		count -= ret;
+		wr_count += ret;
 
 	}