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When building randconfigs, one of the failures is: ld: arch/x86/boot/compressed/kaslr.o: in function `choose_random_location': kaslr.c:(.text+0xbf7): undefined reference to `count_immovable_mem_regions' ld: kaslr.c:(.text+0xcbe): undefined reference to `immovable_mem' make[2]: *** [arch/x86/boot/compressed/vmlinux] Error 1 because CONFIG_ACPI is not enabled in this particular .config but CONFIG_MEMORY_HOTREMOVE is and count_immovable_mem_regions() is unresolvable because it is defined in compressed/acpi.c which is the compilation unit that depends on CONFIG_ACPI. Add CONFIG_ACPI to the explicit dependencies for MEMORY_HOTREMOVE. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Chao Fan <fanc.fnst@cn.fujitsu.com> Cc: x86@kernel.org Link: https://lkml.kernel.org/r/20190205131033.9564-1-bp@alien8.de
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.