linux-kernel - [PATCH] drm: drm_of.c: Using EXPORT_SYMBOL_GPL instead of EXPORT

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Message-Id: <20240429173521.709719-1-sui.jingfeng@linux.dev>
Date: Tue, 30 Apr 2024 01:35:21 +0800
From: Sui Jingfeng <sui.jingfeng@...ux.dev>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Sui Jingfeng <sui.jingfeng@...ux.dev>
Subject: [PATCH] drm: drm_of.c: Using EXPORT_SYMBOL_GPL instead of EXPORT_SYMBOL

Linux kernel puts strict limits on which functions and data structures
are available to loadable kernel modules; only those that have been
explicitly exported with EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL() are
accessible. In the case of EXPORT_SYMBOL_GPL(), only modules that declare
a GPL-compatible license will be able to see the symbol.

Since the whole drm_of.c file is declared with GPL-2.0-only license, so
let us keep functions in that source file consistently.

Signed-off-by: Sui Jingfeng <sui.jingfeng@...ux.dev>
---
 drivers/gpu/drm/drm_of.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
index 177b600895d3..1ca36d654e61 100644
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -44,7 +44,7 @@ uint32_t drm_of_crtc_port_mask(struct drm_device *dev,
 
 	return 0;
 }
-EXPORT_SYMBOL(drm_of_crtc_port_mask);
+EXPORT_SYMBOL_GPL(drm_of_crtc_port_mask);
 
 /**
  * drm_of_find_possible_crtcs - find the possible CRTCs for an encoder port
@@ -77,7 +77,7 @@ uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
 
 	return possible_crtcs;
 }
-EXPORT_SYMBOL(drm_of_find_possible_crtcs);
+EXPORT_SYMBOL_GPL(drm_of_find_possible_crtcs);
 
 /**
  * drm_of_component_match_add - Add a component helper OF node match rule
@@ -181,7 +181,7 @@ int drm_of_component_probe(struct device *dev,
 
 	return component_master_add_with_match(dev, m_ops, match);
 }
-EXPORT_SYMBOL(drm_of_component_probe);
+EXPORT_SYMBOL_GPL(drm_of_component_probe);
 
 /*
  * drm_of_encoder_active_endpoint - return the active encoder endpoint
-- 
2.34.1