void compound_stmt(int level)
{
int this_line = line_cnt;
if(strcmp(tokenPos->textOfLine,"{") == 0)
{
push(LCGWAL, this_line);
push_child(this_line,LOCDEC);
local_dec(level+1);
push_child(this_line,STMT);
stmt_list(level+1);
pTreeType[this_line][0] = COM_STMT;
pTreeType[this_line][1] = level;
if(strcmp(tokenPos->textOfLine,"}") != 0)
{
print_err(tokenPos->lineNum,tokenPos->textOfLine,"COMPOUND_STMT","}",tokenPos->tokenType);
}
else
{
push(RCGWAL, this_line);
}
}
}
int __init __module_ref_addr_init(void)
{
local_t * addr;
unsigned int cpu = get_cpu(); //获取当前cpu ID
/*addr 为指向当前模块引用计数的指针*/
addr = __module_ref_addr( THIS_MODULE, cpu );
printk("<0>addr: %lx\n", (unsigned long)addr);
printk("<0>originally,\n"); //输出初始时当前模块的引用计数
printk("<0>refs of this module is: %d\n",module_refcount(THIS_MODULE));
local_inc(addr); //实现将addr所指向的内容加1
printk("<0>after calling local_inc,\n");
printk("<0>refs of this module is: %d\n",module_refcount(THIS_MODULE));
local_dec(addr); //实现将addr所指向的内容减1
printk("<0>after calling local_dec,\n");
printk("<0>refs of this module is: %d\n",module_refcount(THIS_MODULE));
put_cpu(); //允许抢占 preempt_enable( )
return 0;
}
static void uio_vma_close(struct vm_area_struct *vma)
{
struct uio_device *idev = vma->vm_private_data;
local_dec(&idev->vma_count);
}
static inline void _stp_ring_buffer_enable_cpu(void)
{
local_dec(&__get_cpu_var(_stp_cpu_disabled));
preempt_enable();
}