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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-25 08:34:42 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-25 08:35:13 -0800 |
commit | df8dc74e8a383eaf2d9b44b80a71ec6f0e52b42e (patch) | |
tree | bc3799a43e8b94fa84b32e37b1c124d5e4868f50 /Documentation/zh_CN/sparse.txt | |
parent | 556a169dab38b5100df6f4a45b655dddd3db94c1 (diff) | |
parent | 4a3ad20ccd8f4d2a0535cf98fa83f7b561ba59a9 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6
This can be broken down into these major areas:
- Documentation updates (language translations and fixes, as
well as kobject and kset documenatation updates.)
- major kset/kobject/ktype rework and fixes. This cleans up the
kset and kobject and ktype relationship and architecture,
making sense of things now, and good documenation and samples
are provided for others to use. Also the attributes for
kobjects are much easier to handle now. This cleaned up a LOT
of code all through the kernel, making kobjects easier to use
if you want to.
- struct bus_type has been reworked to now handle the lifetime
rules properly, as the kobject is properly dynamic.
- struct driver has also been reworked, and now the lifetime
issues are resolved.
- the block subsystem has been converted to use struct device
now, and not "raw" kobjects. This patch has been in the -mm
tree for over a year now, and finally all the issues are
worked out with it. Older distros now properly work with new
kernels, and no userspace updates are needed at all.
- nozomi driver is added. This has also been in -mm for a long
time, and many people have asked for it to go in. It is now
in good enough shape to do so.
- lots of class_device conversions to use struct device instead.
The tree is almost all cleaned up now, only SCSI and IB is the
remaining code to fix up...
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6: (196 commits)
Driver core: coding style fixes
Kobject: fix coding style issues in kobject c files
Kobject: fix coding style issues in kobject.h
Driver core: fix coding style issues in device.h
spi: use class iteration api
scsi: use class iteration api
rtc: use class iteration api
power supply : use class iteration api
ieee1394: use class iteration api
Driver Core: add class iteration api
Driver core: Cleanup get_device_parent() in device_add() and device_move()
UIO: constify function pointer tables
Driver Core: constify the name passed to platform_device_register_simple
driver core: fix build with SYSFS=n
sysfs: make SYSFS_DEPRECATED depend on SYSFS
Driver core: use LIST_HEAD instead of call to INIT_LIST_HEAD in __init
kobject: add sample code for how to use ksets/ktypes/kobjects
kobject: add sample code for how to use kobjects in a simple manner.
kobject: update the kobject/kset documentation
kobject: remove old, outdated documentation.
...
Diffstat (limited to 'Documentation/zh_CN/sparse.txt')
-rw-r--r-- | Documentation/zh_CN/sparse.txt | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/Documentation/zh_CN/sparse.txt b/Documentation/zh_CN/sparse.txt new file mode 100644 index 00000000000..75992a603ae --- /dev/null +++ b/Documentation/zh_CN/sparse.txt @@ -0,0 +1,100 @@ +Chinese translated version of Documentation/sparse.txt + +If you have any comment or update to the content, please contact the +original document maintainer directly. However, if you have a problem +communicating in English you can also ask the Chinese maintainer for +help. Contact the Chinese maintainer if this translation is outdated +or if there is a problem with the translation. + +Chinese maintainer: Li Yang <leo@zh-kernel.org> +--------------------------------------------------------------------- +Documentation/sparse.txt 的中文翻译 + +如果想评论或更新本文的内容,请直接联系原文档的维护者。如果你使用英文 +交流有困难的话,也可以向中文版维护者求助。如果本翻译更新不及时或者翻 +译存在问题,请联系中文版维护者。 + +中文版维护者: 李阳 Li Yang <leo@zh-kernel.org> +中文版翻译者: 李阳 Li Yang <leo@zh-kernel.org> + + +以下为正文 +--------------------------------------------------------------------- + +Copyright 2004 Linus Torvalds +Copyright 2004 Pavel Machek <pavel@suse.cz> +Copyright 2006 Bob Copeland <me@bobcopeland.com> + +使用 sparse 工具做类型检查 +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +"__bitwise" 是一种类型属性,所以你应该这样使用它: + + typedef int __bitwise pm_request_t; + + enum pm_request { + PM_SUSPEND = (__force pm_request_t) 1, + PM_RESUME = (__force pm_request_t) 2 + }; + +这样会使 PM_SUSPEND 和 PM_RESUME 成为位方式(bitwise)整数(使用"__force" +是因为 sparse 会抱怨改变位方式的类型转换,但是这里我们确实需要强制进行转 +换)。而且因为所有枚举值都使用了相同的类型,这里的"enum pm_request"也将 +会使用那个类型做为底层实现。 + +而且使用 gcc 编译的时候,所有的 __bitwise/__force 都会消失,最后在 gcc +看来它们只不过是普通的整数。 + +坦白来说,你并不需要使用枚举类型。上面那些实际都可以浓缩成一个特殊的"int +__bitwise"类型。 + +所以更简单的办法只要这样做: + + typedef int __bitwise pm_request_t; + + #define PM_SUSPEND ((__force pm_request_t) 1) + #define PM_RESUME ((__force pm_request_t) 2) + +现在你就有了严格的类型检查所需要的所有基础架构。 + +一个小提醒:常数整数"0"是特殊的。你可以直接把常数零当作位方式整数使用而 +不用担心 sparse 会抱怨。这是因为"bitwise"(恰如其名)是用来确保不同位方 +式类型不会被弄混(小尾模式,大尾模式,cpu尾模式,或者其他),对他们来说 +常数"0"确实是特殊的。 + +获取 sparse 工具 +~~~~~~~~~~~~~~~~ + +你可以从 Sparse 的主页获取最新的发布版本: + + http://www.kernel.org/pub/linux/kernel/people/josh/sparse/ + +或者,你也可以使用 git 克隆最新的 sparse 开发版本: + + git://git.kernel.org/pub/scm/linux/kernel/git/josh/sparse.git + +DaveJ 把每小时自动生成的 git 源码树 tar 包放在以下地址: + + http://www.codemonkey.org.uk/projects/git-snapshots/sparse/ + +一旦你下载了源码,只要以普通用户身份运行: + + make + make install + +它将会被自动安装到你的 ~/bin 目录下。 + +使用 sparse 工具 +~~~~~~~~~~~~~~~~ + +用"make C=1"命令来编译内核,会对所有重新编译的 C 文件使用 sparse 工具。 +或者使用"make C=2"命令,无论文件是否被重新编译都会对其使用 sparse 工具。 +如果你已经编译了内核,用后一种方式可以很快地检查整个源码树。 + +make 的可选变量 CHECKFLAGS 可以用来向 sparse 工具传递参数。编译系统会自 +动向 sparse 工具传递 -Wbitwise 参数。你可以定义 __CHECK_ENDIAN__ 来进行 +大小尾检查。 + + make C=2 CHECKFLAGS="-D__CHECK_ENDIAN__" + +这些检查默认都是被关闭的,因为他们通常会产生大量的警告。 |