[S] Change in libosmocore[master]: select: speed up osmo_fd_is_registered

Attention is currently required from: pespin. dexter has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmocore/+/32579 ) Change subject: select: speed up osmo_fd_is_registered ...................................................................... Patch Set 1: (1 comment) Patchset: PS1: Yes, but lets see if we can cause any harm with the check: if fd->list.next is NULL, then the fd can not be registered, we return false. This can never be wrong. If there is a pointer in fd->list.next, even if it is just noise we have to go through the check, so everything is still fine. If fd->list.next is LLIST_POISON1, then the fd also can not be registered, we return false. When fd->list.next is LLIST_POISON! by coincidence due to not initializing the list, the fd also cannot be registered. I can not see any problem at the moment, other than the method is a bit hacky. Do you see a problem that I don't see here? -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/32579 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I1ce894da39e3f2329c88666a5dda594b8bce4228 Gerrit-Change-Number: 32579 Gerrit-PatchSet: 1 Gerrit-Owner: dexter <pmaier(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: pespin <pespin(a)sysmocom.de> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Comment-Date: Wed, 03 May 2023 13:18:28 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Comment-In-Reply-To: pespin <pespin(a)sysmocom.de> Gerrit-MessageType: comment