#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
+#include <linux/smp_lock.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/delay.h>
#include "miropcm20-rds-core.h"
static char * text_buffer;
-static int rds_users = 0;
+static int rds_users;
static int rds_f_open(struct inode *in, struct file *fi)
if (rds_users)
return -EBUSY;
+ lock_kernel();
rds_users++;
if ((text_buffer=kmalloc(66, GFP_KERNEL)) == 0) {
rds_users--;
printk(KERN_NOTICE "aci-rds: Out of memory by open()...\n");
+ unlock_kernel();
return -ENOMEM;
}
+ unlock_kernel();
return 0;
}