Filling in struct siginfo before calling force_sig_info a tedious and
error prone process, where once in a great while the wrong fields
are filled out, and siginfo has been inconsistently cleared.
Simplify this process by using the helper force_sig_fault. Which
takes as a parameters all of the information it needs, ensures
all of the fiddly bits of filling in struct siginfo are done properly
and then calls force_sig_info.
In short about a 5 line reduction in code for every time force_sig_info
is called, which makes the calling function clearer.
Cc: Yoshinori Sato <firstname.lastname@example.org>
Cc: Rich Felker <email@example.com>
Acked-by: Rich Felker <firstname.lastname@example.org>
Signed-off-by: "Eric W. Biederman" <email@example.com>