linux-kernel - [PATCH v2] drm: import DMA

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Message-Id: <20211027212506.3418521-1-marcel@ziswiler.com>
Date:   Wed, 27 Oct 2021 23:25:05 +0200
From:   Marcel Ziswiler <marcel@...wiler.com>
To:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        dri-devel@...ts.freedesktop.org,
        open list <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Thomas Zimmermann <tzimmermann@...e.de>
Cc:     Maxime Ripard <mripard@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Linux Kernel Functional Testing <lkft@...aro.org>
Subject: [PATCH v2] drm: import DMA_BUF module namespace

From: Marcel Ziswiler <marcel.ziswiler@...adex.com>

Today's -next fails building arm64 defconfig as follows:

ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vunmap from
 namespace DMA_BUF, but does not import it.
ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vmap from
 namespace DMA_BUF, but does not import it.

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
Fixes: commit 4b2b5e142ff4 ("drm: Move GEM memory managers into modules")
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@...adex.com>

---

Changes in v2:
- After consulting the documentation move it to the bottom of the file
  where the other MODULE statements are as suggested by Thomas.
- Also move it down there for the drm_gem_shmem_helper.c file.

 drivers/gpu/drm/drm_gem_cma_helper.c   | 1 +
 drivers/gpu/drm/drm_gem_shmem_helper.c | 3 +--
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
index 6f7b3f8ec04d3..2a34241fee025 100644
--- a/drivers/gpu/drm/drm_gem_cma_helper.c
+++ b/drivers/gpu/drm/drm_gem_cma_helper.c
@@ -581,4 +581,5 @@ drm_gem_cma_prime_import_sg_table_vmap(struct drm_device *dev,
 EXPORT_SYMBOL(drm_gem_cma_prime_import_sg_table_vmap);
 
 MODULE_DESCRIPTION("DRM CMA memory-management helpers");
+MODULE_IMPORT_NS(DMA_BUF);
 MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index f7324582afe71..a5b743a83ce99 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -22,8 +22,6 @@
 #include <drm/drm_prime.h>
 #include <drm/drm_print.h>
 
-MODULE_IMPORT_NS(DMA_BUF);
-
 /**
  * DOC: overview
  *
@@ -779,4 +777,5 @@ drm_gem_shmem_prime_import_sg_table(struct drm_device *dev,
 EXPORT_SYMBOL_GPL(drm_gem_shmem_prime_import_sg_table);
 
 MODULE_DESCRIPTION("DRM SHMEM memory-management helpers");
+MODULE_IMPORT_NS(DMA_BUF);
 MODULE_LICENSE("GPL v2");
-- 
2.26.2