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| author | Nicolai Stange <nstange@suse.de> | 2018-07-29 12:15:33 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-08-05 09:53:13 +0200 |
| commit | 447ae316670230d7d29430e2cbf1f5db4f49d14c (patch) | |
| tree | 9ab0392a39391993a79ec49f77c1ab26e8ff74a8 /arch/x86/kernel/time.c | |
| parent | 45b575c00d8e72d69d75dd8c112f044b7b01b069 (diff) | |
| download | lwn-447ae316670230d7d29430e2cbf1f5db4f49d14c.tar.gz lwn-447ae316670230d7d29430e2cbf1f5db4f49d14c.zip | |
x86: Don't include linux/irq.h from asm/hardirq.h
The next patch in this series will have to make the definition of
irq_cpustat_t available to entering_irq().
Inclusion of asm/hardirq.h into asm/apic.h would cause circular header
dependencies like
asm/smp.h
asm/apic.h
asm/hardirq.h
linux/irq.h
linux/topology.h
linux/smp.h
asm/smp.h
or
linux/gfp.h
linux/mmzone.h
asm/mmzone.h
asm/mmzone_64.h
asm/smp.h
asm/apic.h
asm/hardirq.h
linux/irq.h
linux/irqdesc.h
linux/kobject.h
linux/sysfs.h
linux/kernfs.h
linux/idr.h
linux/gfp.h
and others.
This causes compilation errors because of the header guards becoming
effective in the second inclusion: symbols/macros that had been defined
before wouldn't be available to intermediate headers in the #include chain
anymore.
A possible workaround would be to move the definition of irq_cpustat_t
into its own header and include that from both, asm/hardirq.h and
asm/apic.h.
However, this wouldn't solve the real problem, namely asm/harirq.h
unnecessarily pulling in all the linux/irq.h cruft: nothing in
asm/hardirq.h itself requires it. Also, note that there are some other
archs, like e.g. arm64, which don't have that #include in their
asm/hardirq.h.
Remove the linux/irq.h #include from x86' asm/hardirq.h.
Fix resulting compilation errors by adding appropriate #includes to *.c
files as needed.
Note that some of these *.c files could be cleaned up a bit wrt. to their
set of #includes, but that should better be done from separate patches, if
at all.
Signed-off-by: Nicolai Stange <nstange@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/time.c')
| -rw-r--r-- | arch/x86/kernel/time.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/time.c b/arch/x86/kernel/time.c index 774ebafa97c4..be01328eb755 100644 --- a/arch/x86/kernel/time.c +++ b/arch/x86/kernel/time.c @@ -12,6 +12,7 @@ #include <linux/clockchips.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/i8253.h> #include <linux/time.h> #include <linux/export.h> |