目錄：http://www.cnblogs.com/WuCountry/archive/2008/11/15/1333960.html
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[不提供插圖，讀者最好從網(wǎng)上下載源書]
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5.11. Functions and Variables Featured in This Chapter 本章的函數(shù)，變量和特性
Table 5-1 summarizes the functions, macros, variables, and data structures introduced in this chapter.
表5－1是本章所涉及到的一些函數(shù)，宏，變量以及數(shù)據(jù)結(jié)構(gòu)。

Table 5-1. Functions, macros, variables, and data structures related to system

Functions and macros

initialization Name??
request_irq???
free_irq

Description ???
Registers and releases, respectively, a callback handler for an IRQ line. The registration can be exclusive or shared.
分別用于注冊和釋放在IRQ線路上的回調(diào)句柄！
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request_region

release_region
?Allocates and releases I/O ports and I/O memory.
分配和釋放IO端口和IO內(nèi)存
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call_usermodehelper
?Invokes a user-space helper application.
調(diào)用用戶空間的幫助應(yīng)用程序。
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module_param
?Macro used to define configuration parameters for modules.
模塊參數(shù)
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net_dev_init
?Initializes a piece of the networking code at boot time.
在啟動時初始化
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Global variables
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dev_boot_phase
?Boolean flag used by legacy code to enforce the execution of net_dev_init before NIC device drivers register themselves.
邏輯標(biāo)志位，在老的代碼中用于強迫NIC設(shè)備驅(qū)動在注冊net_dev_init之前來執(zhí)行。

irq_desc
?Pointer to the vector of IRQ descriptors.
打印IRQ向量的描述信息。
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Data structure
??
struct irq_action
?Each IRQ line is defined by an instance of this structure. Among other fields, it includes a callback function.
每一個IRQ線路都定義了一個這個數(shù)據(jù)結(jié)構(gòu)的實例。和其它字段一起，還包括一個回調(diào)函數(shù)　。
?
net_device
?Describes a network device.
?一個網(wǎng)絡(luò)設(shè)備的描述。

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