Size of raw_devices[]

Size of raw_devices[]

Post by Mingming ca » Sun, 10 Feb 2002 08:40:10



Hi,

While I was looking at the static arrays in the drivers, I found global
array raw_devices[] used for describing raw device infos is hard sized
by 256.  To better prepare for more minor bits in the future,  this
small patch is made to using MINORMASK to size raw_devices[] instead of
hardcoding.  Please consider it in 2.5.

--
Mingming Cao

[ raw.patch < 1K ]
diff -urN -X dontdiff /usr/src/linux-2.5.3/drivers/char/raw.c 253.raw/drivers/char/raw.c
--- /usr/src/linux-2.5.3/drivers/char/raw.c     Tue Jan  1 11:40:34 2002

        struct semaphore mutex;
 } raw_device_data_t;

-static raw_device_data_t raw_devices[256];
+static raw_device_data_t raw_devices[MINORMASK+1];

 static ssize_t rw_raw_dev(int rw, struct file *, char *, size_t, loff_t *);

        int i;
        register_chrdev(RAW_MAJOR, "raw", &raw_fops);

-       for (i = 0; i < 256; i++)
+       for (i = 0; i < MINORMASK+1; i++)
                init_MUTEX(&raw_devices[i].mutex);

        return 0;