docs: cgroup-v2: fix misc.events key format descriptiongrafted

In misc cgroup, misc.events does not output a simple "max" key. Instead,
each registered misc resource outputs a separate key suffixed with ".max"
(i.e., "<res>.max").
Update the documentation to clarify that the entry key is "<res>.max".

Suggested-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Cheng Lingfei <chenglingfei@foxmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/include/video/cmdline.h b/include/video/cmdline.h
new file mode 100644
index 000000000..76649465b
--- /dev/null
+++ b/include/video/cmdline.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef VIDEO_CMDLINE_H
+#define VIDEO_CMDLINE_H
+
+#include <linux/kconfig.h>
+#include <linux/types.h>
+
+const char *video_get_options(const char *name);
+
+#if IS_ENABLED(CONFIG_FB_CORE)
+/* exported for compatibility with fbdev; don't use in new code */
+bool __video_get_options(const char *name, const char **option, bool is_of);
+#endif
+
+#endif