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Annotate TDP_RFPPWAIT as unlikely.

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The flag is only set on vfork, but is tested for *all* syscalls.
On amd64 this shortens common-case (not vfork) code.
This commit is contained in:
Mateusz Guzik 2018-11-22 21:38:24 +00:00
parent a5ac8272c0
commit adce241981
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=340786
1 changed files with 1 additions and 1 deletions
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2
sys/kern/subr_syscall.c
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@ -230,7 +230,7 @@ syscallret(struct thread *td, int error)
PROC_UNLOCK(p);
}
if (td->td_pflags & TDP_RFPPWAIT) {
if (__predict_false(td->td_pflags & TDP_RFPPWAIT)) {
/*
* Preserve synchronization semantics of vfork. If
* waiting for child to exec or exit, fork set