[linuxsh-dev] Sync from 2.5.43 / Beating the freeze

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

I don't think change of the architecture port will be considered as
"feature" in feature freeze, provided we don't have changes in generic
part.

Anyway, it would be good if we have:
	(1) Signal handler bug fix (system call restart)
	(2) gUSA
	(3) Stuart Menefy's fast memcpy
	(4) Stuart Menefy's fast TLB-miss handling

I've tested (1), (2) in 2.4.18 throughout.  I don't test (3) and (4)
yet.  SH-3 people should read and check (3) and (4), I think.

(2) would be "feature", I've done it for MIPS, SH, and ARM.  All works
well.
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