[PATCH RFC v4 02/13] efi: bgrt: export the BGRT table and image size

["Màxim Pedraza Padilla" <maximpedraza@gmail.com>]

The DRM splash client reads the boot graphics the firmware left behind
through bgrt_tab and bgrt_image_size. Built as part of drm_client_lib,
which can be a module, it then fails to link:

  ERROR: modpost: drivers/gpu/drm/clients/drm_client_lib.ko: symbol 'bgrt_tab' undefined!
  ERROR: modpost: drivers/gpu/drm/clients/drm_client_lib.ko: symbol 'bgrt_image_size' undefined!

Export both. They are filled in once, early in boot, and only read
after that.

Reported-by: Mario Limonciello <mario.limonciello@amd.com>
Closes: https://lore.kernel.org/dri-devel/5d7067de-97b7-4232-9cf6-e4b978696482@amd.com/
Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Màxim Pedraza Padilla <maximpedraza@gmail.com>
---
 drivers/firmware/efi/efi-bgrt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/firmware/efi/efi-bgrt.c b/drivers/firmware/efi/efi-bgrt.c
index 1da451582812..746a8fb3a337 100644
--- a/drivers/firmware/efi/efi-bgrt.c
+++ b/drivers/firmware/efi/efi-bgrt.c
@@ -17,7 +17,10 @@
 #include <linux/efi-bgrt.h>
 
 struct acpi_table_bgrt bgrt_tab;
+EXPORT_SYMBOL_GPL(bgrt_tab);
+
 size_t bgrt_image_size;
+EXPORT_SYMBOL_GPL(bgrt_image_size);
 
 struct bmp_header {
 	u16 id;
-- 
2.39.5