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get_fs( ) and set_fs( )

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From: Wang Yu
Subject: get_fs( ) and set_fs( )
Date: Thursday, October 25, 2007 - 2:54 am

Hi,all
I have seen the following codes, but do not know what's the meaning of them:
       mm_segment_t old_fs;
      old_fs = get_fs();
      set_fs (KERNEL_DS);
     ........
     set_fs(old_fs);
What is the usage of these codes and in what condition they will be used?
Thanks!

-- 
National Research Center for Intelligent Computing Systems
Institute of Computing Technology, Chinese Academy of Sciences
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Messages in current thread:
get_fs( ) and set_fs( ), Wang Yu, (Thu Oct 25, 2:54 am)
RE: get_fs( ) and set_fs( ), Saumendra Dash, (Thu Oct 25, 5:45 am)
RE: get_fs( ) and set_fs( ), Thippeswamy, Aravind, (Thu Oct 25, 5:50 am)
RE: get_fs( ) and set_fs( ), Thippeswamy, Aravind, (Thu Oct 25, 6:25 am)