dtrace: use a nonzero reference count on the fake module

As of 3.19, try_module_get() fails if this is zero, on the grounds that the
module is going away.

(This was disguised until the module's memory was properly initialized.)

Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Acked-by: Kris Van Hees <kris.van.hees@oracle.com>

diff --git a/kernel/dtrace/dtrace_os.c b/kernel/dtrace/dtrace_os.c
index 1201084040206422624dab728087a43e803799ca..06d9498d44e8c5c84795ccea1bed300631c001d3 100644 (file)
--- a/kernel/dtrace/dtrace_os.c
+++ b/kernel/dtrace/dtrace_os.c
@@ -75,6 +75,7 @@ void dtrace_os_init(void)
        memset(dtrace_kmod, 0, module_size);
        strlcpy(dtrace_kmod->name, "vmlinux", MODULE_NAME_LEN);
        dtrace_kmod->state = MODULE_STATE_LIVE;
+       atomic_inc(&dtrace_kmod->refcnt);
        dtrace_kmod->pdata = (char *)dtrace_kmod +
                                ALIGN(sizeof(struct module), 8);
        dtrace_kmod->core_size = DTRACE_PDATA_MAXSIZE;