As reported by Andy, the Kernel build system runs kernel-doc script for DRM, when W=1. Due to Python's normal behavior, its JIT compiler will create a bytecode and store it under scripts/lib/*/__pycache__.
As one may be using O= and even having the sources on a read-only mount point, disable its creation during build time. This only solves half of the issue though, as one may be manually running the script by hand, without asking Python to not store any bytecode. This should be OK, but afterwards, git status will list the __pycache__ as not committed. To prevent that, add *.pyc to .gitignore. --- v3: - changed the order of PYTHONDONTBYTECODE; - patched also scripts/Makefile Mauro Carvalho Chehab (2): scripts/kernel-doc.py: don't create *.pyc files .gitignore: ignore Python compiled bytecode .gitignore | 1 + drivers/gpu/drm/Makefile | 2 +- drivers/gpu/drm/i915/Makefile | 2 +- include/drm/Makefile | 2 +- scripts/Makefile.build | 2 +- scripts/find-unused-docs.sh | 2 +- 6 files changed, 6 insertions(+), 5 deletions(-) -- 2.49.0
