[linuxsh-dev] gUSA committed for 2.4.18

[NIIBE Y. <gn...@m1...>]

It's sad that our test coverage is bad.
I've found a bug of __clear_user, fixed.
I've committed gUSA implementation for 2.4.18.

I'm testing.  After that, I will tag 2_4_18 and merge 2.4.19.
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