Re: [OE-core] [PATCH 2/3] kernel-fit-image: reintroduce option to replace kernel image

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Thu Jul 23, 2026 at 2:49 PM CEST, Nora Schiffer via lists.openembedded.org wrote:
> A similar feature was added in commit 9c8ef2119949 ("kernel-fit-image:
> control kernel section with FIT_LINUX_BIN") and subsequently reverted in
> commit 6eae261b6f52 ("Revert "kernel-fit-image: control kernel section
> with FIT_LINUX_BIN"") due to its incomplete implementation and lack of
> tests. Reintroduce an improved version:
>
> - The FIT_LINUX_BIN variable (which had been left unused) is renamed to
>   FIT_KERNEL_FILENAME. It can now actually be used to select a different
>   file from DEPLOY_DIR_IMAGE. The file will be compressed using
>   FIT_KERNEL_COMP_ALG as part of the FIT image recipe, rather than than
>   letting the kernel recipe handle this through
>   kernel-fit-extra-artifacts.bbclass.
> - Alternatively, FIT_KERNEL_FILENAME_COMPRESSED can be used to select a
>   pre-compressed file from DEPLOY_DIR_IMAGE. In this case,
>   FIT_KERNEL_COMP_ALG only controls the "compression" field of the
>   generated FIT image.
> - To preserve backwards compatibility, FIT_KERNEL_FILENAME_COMPRESSED
>   defaults to "linux.bin". As a special case, the compression algorithm
>   will be read from "linux_comp" for linux.bin. This behavior is
>   considered deprecated and relying on it results in a warning.
> - Add tests.
>
> To resolve the new deprecation warning, it is usually sufficient to set
> KERNEL_IMAGETYPE to the desired type ("Image" on many archs) and set
> FIT_KERNEL_FILENAME to the same value.
>
> Signed-off-by: Nora Schiffer <nora.schiffer@ew.tq-group.com>
> ---

Hi Nora,

Thanks for your patch.

It looks like the test_fit_image_kernel_filename selftest is failing on
arm hosts:

2026-07-24 21:31:27,684 - oe-selftest - INFO - fitimage.KernelFitImageRecipeTests.test_fit_image_kernel_filename (subunit.RemotedTestCase)
2026-07-24 21:31:27,685 - oe-selftest - INFO -  ... FAIL
...
ERROR: linux-yocto-fitimage-1.0-r0 do_compile: Error executing a python function in exec_func_python() autogenerated:

The stack trace of python calls that resulted in this exception/failure was:
File: 'exec_func_python() autogenerated', lineno: 2, function: <module>
     0001:
 *** 0002:do_compile(d)
     0003:
File: '/srv/pokybuild/yocto-worker/oe-selftest-armhost/build/layers/openembedded-core/meta/classes-recipe/kernel-fit-image.bbclass', lineno: 129, function: do_compile
     0125:
     0126:    elif kernel_compressed:
     0127:        kernel_path = os.path.join(kernel_deploydir, kernel_compressed)
     0128:        kernel_name = os.path.basename(kernel_compressed)
 *** 0129:        shutil.copyfile(kernel_path, kernel_name)
     0130:
     0131:    # FIT_KERNEL_FILENAME or FIT_KERNEL_FILENAME_COMPRESSED was set
     0132:    if kernel_name:
     0133:        root_node.fitimage_emit_section_kernel("kernel-1", kernel_name, kernel_comp_alg,
File: '/usr/lib/python3.14/shutil.py', lineno: 313, function: copyfile
     0309:
     0310:    if not follow_symlinks and _islink(src):
     0311:        os.symlink(os.readlink(src), dst)
     0312:    else:
 *** 0313:        with open(src, 'rb') as fsrc:
     0314:            try:
     0315:                with open(dst, 'wb') as fdst:
     0316:                    # macOS
     0317:                    if _HAS_FCOPYFILE:
Exception: FileNotFoundError: [Errno 2] No such file or directory: '/srv/pokybuild/yocto-worker/oe-selftest-armhost/build/build-st-1142023/tmp/deploy/images/qemuarm64/bzImage'

https://autobuilder.yoctoproject.org/valkyrie/#/builders/23/builds/4420

Can you have a look at the issue?

Thanks,
Mathieu

-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com