- Lock down the ``module'' structure by adding an SX lock that is used by

  all the global bits of ``module'' data.  This commit adds a few generic
  macros, MOD_SLOCK, MOD_XLOCK, etc., that are meant to be used as ways
  of accessing the SX lock.  It is also the first step in helping to lock
  down the kernel linker and module systems.

Reviewed by: jhb, jake, smp@

1 files changed, 5 insertions, 0 deletions

diff --git a/sys/kern/kern_syscalls.c b/sys/kern/kern_syscalls.c
index 4dd623e..2867bc9 100644
--- a/sys/kern/kern_syscalls.c
+++ b/sys/kern/kern_syscalls.c
@@ -30,6 +30,9 @@
 #include <sys/sysproto.h>
 #include <sys/sysent.h>
 #include <sys/syscall.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/sx.h>
 #include <sys/module.h>
 
 /*
@@ -96,7 +99,9 @@ syscall_module_handler(struct module *mod, int what, void *arg)
                if (error)
                        return error;
 	       ms.intval = *data->offset;
+	       MOD_XLOCK;
 	       module_setspecific(mod, &ms);
+	       MOD_XUNLOCK;
                if (data->chainevh)
                        error = data->chainevh(mod, what, data->chainarg);
                return error;