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bdcb37a5d8
The vmlinux decompressor code intentionally has only a limited set of
included header files, but this started running into a build failure
because of the bitmap logic needing linux/errno.h:
In file included from include/linux/cpumask.h:12,
from include/linux/mm_types_task.h:14,
from include/linux/mm_types.h:5,
from include/linux/buildid.h:5,
from include/linux/module.h:14,
from arch/arm/boot/compressed/../../../../lib/lz4/lz4_decompress.c:39,
from arch/arm/boot/compressed/../../../../lib/decompress_unlz4.c:10,
from arch/arm/boot/compressed/decompress.c:60:
include/linux/bitmap.h: In function 'bitmap_allocate_region':
include/linux/bitmap.h:527:25: error: 'EBUSY' undeclared (first use in this function)
527 | return -EBUSY;
| ^~~~~
include/linux/bitmap.h:527:25: note: each undeclared identifier is reported only once for each function it appears in
include/linux/bitmap.h: In function 'bitmap_find_free_region':
include/linux/bitmap.h:554:17: error: 'ENOMEM' undeclared (first use in this function)
554 | return -ENOMEM;
| ^~~~~~
This is easily avoided by changing linux/buildid.h to no longer depend on
linux/mm_types.h, a header that pulls in a huge number of indirect dependencies.
Fixes: b9c957f554442 ("bitmap: move bitmap_*_region() functions to bitmap.h")
Fixes:
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.