tree 9c6c695f474dfced54311467fd5c14de57f6dbb9
parent 2ffebca6aa7e1687905c842dd8c5c1e811e574e7
author Oleg Nesterov <oleg@redhat.com> 1245281243 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1245355428 -0700

allow_signal: kill the bogus ->mm check, add a note about CLONE_SIGHAND

allow_signal() checks ->mm == NULL.  Not sure why.  Perhaps to make sure
current is the kernel thread.  But this helper must not be used unless we
are the kernel thread, kill this check.

Also, document the fact that the CLONE_SIGHAND kthread must not use
allow_signal(), unless the caller really wants to change the parent's
->sighand->action as well.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>