V4L/DVB (5406): Add comment why the symbols are exported.

It is not immediately obvious why the ivtv symbols are exported
in ivtv-driver.c since both ivtv-fb and the IR-blaster module
are still out-of-tree, currently being ported to be in kernel.

Added a comment so people are aware of these issues.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/media/video/ivtv/ivtv-driver.c b/drivers/media/video/ivtv/ivtv-driver.c
index ad0c1628ef96..c61e88319a22 100644
--- a/drivers/media/video/ivtv/ivtv-driver.c
+++ b/drivers/media/video/ivtv/ivtv-driver.c
@@ -1356,6 +1356,8 @@ static void module_cleanup(void)
         pci_unregister_driver(&ivtv_pci_driver);
 }
 
+/* Note: These symbols are exported because they are used by the ivtv-fb
+   framebuffer module and an infrared module for the IR-blaster. */
 EXPORT_SYMBOL(ivtv_set_irq_mask);
 EXPORT_SYMBOL(ivtv_cards_active);
 EXPORT_SYMBOL(ivtv_cards);