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Message-ID: <202505011655.qTmh4UA7-lkp@intel.com>
Date: Thu, 1 May 2025 17:04:53 +0800
From: kernel test robot <lkp@...el.com>
To: oushixiong1025@....com, Sumit Semwal <sumit.semwal@...aro.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
Christian König <christian.koenig@....com>,
linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Dave Airlie <airlied@...hat.com>, Sean Paul <sean@...rly.run>,
Shixiong Ou <oushixiong@...inos.cn>
Subject: Re: [PATCH 2/3] drm/prime: Support importing DMA-BUF without sg_table
Hi,
kernel test robot noticed the following build warnings:
[auto build test WARNING on jic23-iio/togreg]
[also build test WARNING on char-misc/char-misc-testing char-misc/char-misc-next char-misc/char-misc-linus usb/usb-testing usb/usb-next usb/usb-linus xen-tip/linux-next linus/master v6.15-rc4]
[cannot apply to tegra/for-next drm-xe/drm-xe-next rmk-arm/drm-armada-devel rmk-arm/drm-armada-fixes next-20250430]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/oushixiong1025-163-com/drm-prime-Support-importing-DMA-BUF-without-sg_table/20250430-170136
base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link: https://lore.kernel.org/r/20250430085658.540746-2-oushixiong1025%40163.com
patch subject: [PATCH 2/3] drm/prime: Support importing DMA-BUF without sg_table
config: arm64-randconfig-003-20250501 (https://download.01.org/0day-ci/archive/20250501/202505011655.qTmh4UA7-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250501/202505011655.qTmh4UA7-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505011655.qTmh4UA7-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/drm_prime.c:925:24: warning: no previous prototype for function 'drm_gem_prime_import_dev_skip_map' [-Wmissing-prototypes]
925 | struct drm_gem_object *drm_gem_prime_import_dev_skip_map(struct drm_device *dev,
| ^
drivers/gpu/drm/drm_prime.c:925:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
925 | struct drm_gem_object *drm_gem_prime_import_dev_skip_map(struct drm_device *dev,
| ^
| static
1 warning generated.
vim +/drm_gem_prime_import_dev_skip_map +925 drivers/gpu/drm/drm_prime.c
913
914 /**
915 * drm_gem_prime_import_dev_skip_map - core implementation of the import callback
916 * @dev: drm_device to import into
917 * @dma_buf: dma-buf object to import
918 * @attach_dev: struct device to dma_buf attach
919 *
920 * This function exports a dma-buf without get it's scatter/gather table.
921 *
922 * Drivers who need to get an scatter/gather table for objects need to call
923 * drm_gem_prime_import_dev() instead.
924 */
> 925 struct drm_gem_object *drm_gem_prime_import_dev_skip_map(struct drm_device *dev,
926 struct dma_buf *dma_buf,
927 struct device *attach_dev)
928 {
929 struct dma_buf_attachment *attach;
930 struct drm_gem_object *obj;
931 int ret;
932
933 if (dma_buf->ops == &drm_gem_prime_dmabuf_ops) {
934 obj = dma_buf->priv;
935 if (obj->dev == dev) {
936 /*
937 * Importing dmabuf exported from our own gem increases
938 * refcount on gem itself instead of f_count of dmabuf.
939 */
940 drm_gem_object_get(obj);
941 return obj;
942 }
943 }
944
945 attach = dma_buf_attach(dma_buf, attach_dev, true);
946 if (IS_ERR(attach))
947 return ERR_CAST(attach);
948
949 get_dma_buf(dma_buf);
950
951 obj = dev->driver->gem_prime_import_attachment(dev, attach);
952 if (IS_ERR(obj)) {
953 ret = PTR_ERR(obj);
954 goto fail_detach;
955 }
956
957 obj->import_attach = attach;
958 obj->resv = dma_buf->resv;
959
960 return obj;
961
962 fail_detach:
963 dma_buf_detach(dma_buf, attach);
964 dma_buf_put(dma_buf);
965
966 return ERR_PTR(ret);
967 }
968 EXPORT_SYMBOL(drm_gem_prime_import_dev_skip_map);
969
--
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https://github.com/intel/lkp-tests/wiki
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