01-12-2009
11,728,
1,345
Join Date: Feb 2004
Last Activity: 8 May 2020, 9:07 AM EDT
Location: NM
Posts: 11,728
Thanks Given: 903
Thanked 1,345 Times in 1,201 Posts
I do not know much about it - it is called to block all the signals except those in the second argument (OR'ed list of signal values), for the first process context argument.
It is called in drivers during setting up kernel threads. More than that I do not know.