diff options
Diffstat (limited to 'sys/dev/hwpmc/hwpmc_logging.c')
| -rw-r--r-- | sys/dev/hwpmc/hwpmc_logging.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/dev/hwpmc/hwpmc_logging.c b/sys/dev/hwpmc/hwpmc_logging.c index 6612203..cfb055b 100644 --- a/sys/dev/hwpmc/hwpmc_logging.c +++ b/sys/dev/hwpmc/hwpmc_logging.c @@ -44,6 +44,7 @@ __FBSDID("$FreeBSD$"); #include <sys/module.h> #include <sys/mutex.h> #include <sys/pmc.h> +#include <sys/pmckern.h> #include <sys/pmclog.h> #include <sys/proc.h> #include <sys/signalvar.h> @@ -552,6 +553,12 @@ pmclog_configure_log(struct pmc_mdep *md, struct pmc_owner *po, int logfd) int error; struct proc *p; + /* + * As long as it is possible to get a LOR between pmc_sx lock and + * proctree/allproc sx locks used for adding a new process, assure + * the former is not held here. + */ + sx_assert(&pmc_sx, SA_UNLOCKED); PMCDBG(LOG,CFG,1, "config po=%p logfd=%d", po, logfd); p = po->po_owner; |
