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[Xen-devel] confusion about the meaning of CONFIG_XEN
| To: | "xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] confusion about the meaning of CONFIG_XEN |
| From: | "Zang Hongyong" <zanghongyong@xxxxxxxxxx> |
| Date: | Mon, 7 Jul 2008 15:57:30 +0800 |
| Delivery-date: | Mon, 07 Jul 2008 00:58:56 -0700 |
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hi all,
I noticed "CONFIG_XEN" appears many times in Xen source code. I'm confused
about the meaning of "CONFIG_XEN".
For example,
in "gnttab.c", the definations of gnttab_map() and gnttab_resume() vary
with "ifdef CONFIG_XEN" or not.
And I also noticed ifndef CONFIG_XEN , the file <platform-pci.h> is
included.
So my questions are
1)What's the meanning of CONFIG_XEN? and on which kind of conditions,
CONFIG_XEN should not be defined?
2)What is platform-pci for?
Any advice would be welcome.
Thanks in advance.
Zang Hongyong
zanghongyong@xxxxxxxxxx
2008-07-07
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