| Message ID | 1502491174-10913-3-git-send-email-jason.ekstrand@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Jason, [auto build test WARNING on drm/drm-next] [also build test WARNING on v4.13-rc5 next-20170811] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Jason-Ekstrand/drm-syncobj-Add-full-featured-wait-support-v2/20170814-074233 base: git://people.freedesktop.org/~airlied/linux.git drm-next reproduce: make htmldocs All warnings (new ones prefixed by >>): WARNING: convert(1) not found, for SVG to PDF conversion install ImageMagick (https://www.imagemagick.org) include/linux/init.h:1: warning: no structured comments found include/linux/mod_devicetable.h:687: warning: Excess struct/union/enum/typedef member 'ver_major' description in 'fsl_mc_device_id' include/linux/mod_devicetable.h:687: warning: Excess struct/union/enum/typedef member 'ver_minor' description in 'fsl_mc_device_id' kernel/sched/core.c:2080: warning: No description found for parameter 'rf' kernel/sched/core.c:2080: warning: Excess function parameter 'cookie' description in 'try_to_wake_up_local' include/linux/wait.h:555: warning: No description found for parameter 'wq' include/linux/wait.h:555: warning: Excess function parameter 'wq_head' description in 'wait_event_interruptible_hrtimeout' include/linux/wait.h:759: warning: No description found for parameter 'wq_head' include/linux/wait.h:759: warning: Excess function parameter 'wq' description in 'wait_event_killable' include/linux/kthread.h:26: warning: Excess function parameter '...' description in 'kthread_create' kernel/sys.c:1: warning: no structured comments found include/linux/device.h:968: warning: No description found for parameter 'dma_ops' drivers/dma-buf/seqno-fence.c:1: warning: no structured comments found include/linux/sync_file.h:51: warning: No description found for parameter 'flags' include/linux/iio/iio.h:603: warning: No description found for parameter 'trig_readonly' include/linux/iio/trigger.h:151: warning: No description found for parameter 'indio_dev' include/linux/iio/trigger.h:151: warning: No description found for parameter 'trig' include/linux/device.h:969: warning: No description found for parameter 'dma_ops' drivers/ata/libata-eh.c:1449: warning: No description found for parameter 'link' drivers/ata/libata-eh.c:1449: warning: Excess function parameter 'ap' description in 'ata_eh_done' drivers/ata/libata-eh.c:1590: warning: No description found for parameter 'qc' drivers/ata/libata-eh.c:1590: warning: Excess function parameter 'dev' description in 'ata_eh_request_sense' drivers/mtd/nand/nand_base.c:2751: warning: Excess function parameter 'cached' description in 'nand_write_page' drivers/mtd/nand/nand_base.c:2751: warning: Excess function parameter 'cached' description in 'nand_write_page' arch/s390/include/asm/cmb.h:1: warning: no structured comments found drivers/scsi/scsi_lib.c:1116: warning: No description found for parameter 'rq' drivers/scsi/constants.c:1: warning: no structured comments found include/linux/usb/gadget.h:230: warning: No description found for parameter 'claimed' include/linux/usb/gadget.h:230: warning: No description found for parameter 'enabled' include/linux/usb/gadget.h:412: warning: No description found for parameter 'quirk_altset_not_supp' include/linux/usb/gadget.h:412: warning: No description found for parameter 'quirk_stall_not_supp' include/linux/usb/gadget.h:412: warning: No description found for parameter 'quirk_zlp_not_supp' fs/inode.c:1666: warning: No description found for parameter 'rcu' include/linux/jbd2.h:443: warning: No description found for parameter 'i_transaction' include/linux/jbd2.h:443: warning: No description found for parameter 'i_next_transaction' include/linux/jbd2.h:443: warning: No description found for parameter 'i_list' include/linux/jbd2.h:443: warning: No description found for parameter 'i_vfs_inode' include/linux/jbd2.h:443: warning: No description found for parameter 'i_flags' include/linux/jbd2.h:497: warning: No description found for parameter 'h_rsv_handle' include/linux/jbd2.h:497: warning: No description found for parameter 'h_reserved' include/linux/jbd2.h:497: warning: No description found for parameter 'h_type' include/linux/jbd2.h:497: warning: No description found for parameter 'h_line_no' include/linux/jbd2.h:497: warning: No description found for parameter 'h_start_jiffies' include/linux/jbd2.h:497: warning: No description found for parameter 'h_requested_credits' include/linux/jbd2.h:497: warning: No description found for parameter 'saved_alloc_context' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_chkpt_bhs' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_devname' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_average_commit_time' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_min_batch_time' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_max_batch_time' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_commit_callback' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_failed_commit' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_chksum_driver' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_csum_seed' fs/jbd2/transaction.c:511: warning: No description found for parameter 'type' fs/jbd2/transaction.c:511: warning: No description found for parameter 'line_no' fs/jbd2/transaction.c:641: warning: No description found for parameter 'gfp_mask' include/drm/drm_drv.h:593: warning: No description found for parameter 'gem_prime_pin' include/drm/drm_drv.h:593: warning: No description found for parameter 'gem_prime_unpin' include/drm/drm_drv.h:593: warning: No description found for parameter 'gem_prime_res_obj' include/drm/drm_drv.h:593: warning: No description found for parameter 'gem_prime_get_sg_table' include/drm/drm_drv.h:593: warning: No description found for parameter 'gem_prime_import_sg_table' include/drm/drm_drv.h:593: warning: No description found for parameter 'gem_prime_vmap' include/drm/drm_drv.h:593: warning: No description found for parameter 'gem_prime_vunmap' include/drm/drm_drv.h:593: warning: No description found for parameter 'gem_prime_mmap' include/drm/drm_mode_config.h:771: warning: No description found for parameter 'modifiers_property' include/drm/drm_mode_config.h:771: warning: Excess struct/union/enum/typedef member 'modifiers' description in 'drm_mode_config' include/drm/drm_plane.h:544: warning: No description found for parameter 'modifiers' include/drm/drm_plane.h:544: warning: No description found for parameter 'modifier_count' >> include/drm/drm_syncobj.h:57: warning: No description found for parameter '_fence' >> include/drm/drm_syncobj.h:57: warning: Excess struct/union/enum/typedef member 'fence' description in 'drm_syncobj' Documentation/doc-guide/sphinx.rst:121: ERROR: Unknown target name: "sphinx c domain". kernel/sched/fair.c:7584: WARNING: Inline emphasis start-string without end-string. kernel/time/timer.c:1200: ERROR: Unexpected indentation. kernel/time/timer.c:1202: ERROR: Unexpected indentation. kernel/time/timer.c:1203: WARNING: Block quote ends without a blank line; unexpected unindent. include/linux/wait.h:108: WARNING: Block quote ends without a blank line; unexpected unindent. include/linux/wait.h:111: ERROR: Unexpected indentation. include/linux/wait.h:113: WARNING: Block quote ends without a blank line; unexpected unindent. kernel/time/hrtimer.c:991: WARNING: Block quote ends without a blank line; unexpected unindent. kernel/signal.c:323: WARNING: Inline literal start-string without end-string. kernel/rcu/tree.c:3187: ERROR: Unexpected indentation. kernel/rcu/tree.c:3214: ERROR: Unexpected indentation. kernel/rcu/tree.c:3215: WARNING: Bullet list ends without a blank line; unexpected unindent. include/linux/iio/iio.h:219: ERROR: Unexpected indentation. include/linux/iio/iio.h:220: WARNING: Block quote ends without a blank line; unexpected unindent. include/linux/iio/iio.h:226: WARNING: Definition list ends without a blank line; unexpected unindent. drivers/iio/industrialio-core.c:633: ERROR: Unknown target name: "iio_val". drivers/iio/industrialio-core.c:640: ERROR: Unknown target name: "iio_val". drivers/ata/libata-core.c:5906: ERROR: Unknown target name: "hw". drivers/message/fusion/mptbase.c:5051: WARNING: Definition list ends without a blank line; unexpected unindent. drivers/tty/serial/serial_core.c:1897: WARNING: Definition list ends without a blank line; unexpected unindent. drivers/pci/pci.c:3470: ERROR: Unexpected indentation. include/linux/regulator/driver.h:271: ERROR: Unknown target name: "regulator_regmap_x_voltage". include/linux/spi/spi.h:373: ERROR: Unexpected indentation. drivers/w1/w1_io.c:196: WARNING: Definition list ends without a blank line; unexpected unindent. block/bio.c:404: ERROR: Unknown target name: "gfp". sound/soc/soc-core.c:2703: ERROR: Unknown target name: "snd_soc_daifmt". sound/core/jack.c:312: ERROR: Unknown target name: "snd_jack_btn". Documentation/media/v4l-drivers/imx.rst:: WARNING: document isn't included in any toctree Documentation/virtual/kvm/vcpu-requests.rst:: WARNING: document isn't included in any toctree Documentation/dev-tools/kselftest.rst:15: WARNING: Could not lex literal_block as "c". Highlighting skipped. Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 56: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 56: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 56: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 56: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 56: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 56: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "~/.fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 56: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected vim +/_fence +57 include/drm/drm_syncobj.h e9083420 Dave Airlie 2017-04-04 @57 :::::: The code at line 57 was first introduced by commit :::::: e9083420bbacce27e43d418064d0d2dfb4b37aaa drm: introduce sync objects (v4) :::::: TO: Dave Airlie <airlied@redhat.com> :::::: CC: Dave Airlie <airlied@redhat.com> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c index 0412b0b..0190ec2 100644 --- a/drivers/gpu/drm/drm_syncobj.c +++ b/drivers/gpu/drm/drm_syncobj.c @@ -75,6 +75,12 @@ struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private, } EXPORT_SYMBOL(drm_syncobj_find); +struct dma_fence *drm_syncobj_fence_get(struct drm_syncobj *syncobj) +{ + return dma_fence_get_rcu_safe(&syncobj->_fence); +} +EXPORT_SYMBOL(drm_syncobj_fence_get); + /** * drm_syncobj_replace_fence - replace fence in a sync object. * @syncobj: Sync object to replace fence in @@ -89,7 +95,7 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj, if (fence) dma_fence_get(fence); - old_fence = xchg(&syncobj->fence, fence); + old_fence = xchg(&syncobj->_fence, fence); dma_fence_put(old_fence); } @@ -105,7 +111,7 @@ int drm_syncobj_find_fence(struct drm_file *file_private, if (!syncobj) return -ENOENT; - *fence = dma_fence_get(syncobj->fence); + *fence = drm_syncobj_fence_get(syncobj); if (!*fence) { ret = -EINVAL; } @@ -125,7 +131,7 @@ void drm_syncobj_free(struct kref *kref) struct drm_syncobj *syncobj = container_of(kref, struct drm_syncobj, refcount); - dma_fence_put(syncobj->fence); + dma_fence_put(syncobj->_fence); kfree(syncobj); } EXPORT_SYMBOL(drm_syncobj_free); diff --git a/include/drm/drm_syncobj.h b/include/drm/drm_syncobj.h index 7d4ad77..c06a441 100644 --- a/include/drm/drm_syncobj.h +++ b/include/drm/drm_syncobj.h @@ -43,8 +43,11 @@ struct drm_syncobj { /** * @fence: * NULL or a pointer to the fence bound to this object. + * + * This pointer should not be accessed directly. Instead, use + * drm_syncobj_fence_get or drm_syncobj_replace_fence. */ - struct dma_fence *fence; + struct dma_fence *_fence; /** * @file: * a file backing for this syncobj. @@ -79,6 +82,7 @@ drm_syncobj_put(struct drm_syncobj *obj) struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private, u32 handle); +struct dma_fence *drm_syncobj_fence_get(struct drm_syncobj *syncobj); void drm_syncobj_replace_fence(struct drm_syncobj *syncobj, struct dma_fence *fence); int drm_syncobj_find_fence(struct drm_file *file_private,
The atomic exchange operation in drm_syncobj_replace_fence is sufficient for the case where it races with itself. However, if you have a race between a replace_fence and dma_fence_get(syncobj->fence), you may end up with the entire replace_fence happening between the point in time where the one thread gets the syncobj->fence pointer and when it calls dma_fence_get() on it. If this happens, then the reference may be dropped before we get a chance to get a new one. The new helper uses dma_fence_get_rcu_safe to get rid of the race. This is also needed because it allows us to do a bit more than just get a reference in drm_syncobj_fence_get should we wish to do so. Signed-off-by: Jason Ekstrand <jason@jlekstrand.net> --- drivers/gpu/drm/drm_syncobj.c | 12 +++++++++--- include/drm/drm_syncobj.h | 6 +++++- 2 files changed, 14 insertions(+), 4 deletions(-)