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I am Chaitanya from the linux graphics team in Intel. This mail is regarding a regression we are seeing in our CI runs[1] on linux-next repository. Since the version next-20251201 [2], we are seeing the following regression ````````````````````````````````````````````````````````````````````````````````` Starting subtest: load (i915_module_load:1280) igt_debugfs-CRITICAL: Test assertion failure function igt_debugfs_path, file ../lib/igt_debugfs.c:121: (i915_module_load:1280) igt_debugfs-CRITICAL: Failed assertion: debugfs_root (i915_module_load:1280) igt_debugfs-CRITICAL: Last errno: 2, No such file or directory Subtest load failed. ````````````````````````````````````````````````````````````````````````````````` I see some other drivers also failing to create their debugfs entries. ````````````````````````````````````````````````````````````````````````````````` [ 0.134437] pinctrl core: failed to create debugfs directory [ 3.488263] intel-lpss 0000:00:15.0: Failed to create debugfs entries [ 3.563494] intel-lpss 0000:00:15.1: Failed to create debugfs entries [ 3.631076] intel-lpss 0000:00:15.2: Failed to create debugfs entries [ 3.697366] intel-lpss 0000:00:15.3: Failed to create debugfs entries [ 3.764351] intel-lpss 0000:00:19.0: Failed to create debugfs entries [ 3.841824] intel-lpss 0000:00:19.1: Failed to create debugfs entries [ 3.909492] nvme0: failed to create debugfs directory [ 3.937845] nvme0n1: failed to create debugfs directory [ 5.636042] pinctrl core: failed to create debugfs directory for INTC105E:00 [ 177.973628] cec: Failed to create debugfs cec dir ````````````````````````````````````````````````````````````````````````````````` Detailed log can be found in [3]. After bisecting the tree, the following patch [4] seems to be the first "bad" commit ````````````````````````````````````````````````````````````````````````````````````````````````````````` commit f278809475f6835b56de78b28dc2cc0c7e2c20a4 Author: Aaron Thompson dev@aaront.org Date: Thu Nov 20 10:26:33 2025 +0000 debugfs: Remove broken no-mount mode ````````````````````````````````````````````````````````````````````````````````````````````````````````` We also verified that if we revert the patch the issue is not seen. Could you please check why the patch causes this regression and provide a fix if necessary? Thank you. Regards Chaitanya [1] https://intel-gfx-ci.01.org/tree/linux-next/combined-alt.html? [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20251201 [3] https://intel-gfx-ci.01.org/tree/linux-next/next-20251201/bat-arlh-2/igt@i915_module_load@load.html [4] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20251201&id=f278809475f6835b56de78b28dc2cc0c7e2c20a4