On Tue, 8 Apr 2008, Oleg Nesterov wrote:
quoted text
> 
> We only need this flag as an implicit parameter to the arch dependent do_signal()
> which we can't call directly, and thus it must imply TIF_SIGPENDING, and it
> is not valid after do_signal() (should be cleared). This all looks like
> ERESTART_ magic, why should we add something else ?

I think you're right. I didn't look at the actual code-paths, but my gut 
feel says "yes, TIF_RESTORE_SIGMASK should actually have been 
-ERESTARTSIGRESTORE". That sounds like the right thing to do.

		Linus
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