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441ccc3512
When compiling the x86 kernel, if X86_LOCAL_APIC is not enabled but
GENERIC_MSI_IRQ is selected in '.config', the following compilation
error will occur:
include/linux/gpio/driver.h:38:19: error:
field 'msiinfo' has incomplete type
kernel/irq/msi.c:752:5: error: invalid use of incomplete typedef
'msi_alloc_info_t' {aka 'struct irq_alloc_info'}
kernel/irq/msi.c:740:1: error: control reaches end of non-void function
This is because file such as 'kernel/irq/msi.c' only depends on
'GENERIC_MSI_IRQ', and uses 'struct msi_alloc_info_t'. However,
this struct depends on 'X86_LOCAL_APIC'.
When enable 'GENERIC_MSI_IRQ' or 'X86_LOCAL_APIC' will select
'IRQ_DOMAIN_HIERARCHY', so exposing this struct using
'IRQ_DOMAIN_HIERARCHY' rather than 'X86_LOCAL_APIC'.
Under the above conditions, if 'HPET_TIMER' is selected, the following
compilation error will occur:
arch/x86/kernel/hpet.c:550:13: error: ‘x86_vector_domain’ undeclared
arch/x86/kernel/hpet.c:600:9: error: implicit declaration of
function ‘init_irq_alloc_info’
This is because 'x86_vector_domain' is defined in 'kernel/apic/vector.c'
which is compiled only when 'X86_LOCAL_APIC' is enabled. Besides,
function 'msi_domain_set_affinity' is defined in 'include/linux/msi.h'
which depends on 'GENERIC_MSI_IRQ'. So use 'X86_LOCAL_APIC' and
'GENERIC_MSI_IRQ' to expose these code.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Lu Yao <yaolu@kylinos.cn>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20231012032659.323251-1-yaolu@kylinos.cn
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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.