https://android.googlesource.com/kernel/msm/+/43a79436bed5499b78f140a73003975576987505/fs/signalfd.c
fs/signalfd.c - kernel/msm - Git at Google
fsckernelmsmgit
https://commitfest.postgresql.org/patch/4279/
Trust signalfd on illumos, again.
trustillumos