diff options
Diffstat (limited to 'lib/libc/stdio/fwalk.c')
| -rw-r--r-- | lib/libc/stdio/fwalk.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/libc/stdio/fwalk.c b/lib/libc/stdio/fwalk.c index 17cb5ce..b943be4 100644 --- a/lib/libc/stdio/fwalk.c +++ b/lib/libc/stdio/fwalk.c @@ -61,10 +61,13 @@ _fwalk(function) * It should be safe to walk the list without locking it; * new nodes are only added to the end and none are ever * removed. + * + * Avoid locking this list while walking it or else you will + * introduce a potential deadlock in [at least] refill.c. */ for (g = &__sglue; g != NULL; g = g->next) for (fp = g->iobs, n = g->niobs; --n >= 0; fp++) - if (fp->_flags != 0) + if ((fp->_flags != 0) && ((fp->_flags & __SIGN) == 0)) ret |= (*function)(fp); return (ret); } |
