diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2017-08-28 08:47:35 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-08-29 11:42:30 +0200 |
| commit | a45525b5b47c10c0446eda21227792b39af233dc (patch) | |
| tree | 96675f0341e2ac551ab6625def641fdb5c72e22b /arch | |
| parent | 0428e01a2f13a6b7dae8289fb10030dbea336dee (diff) | |
| download | linux-a45525b5b47c10c0446eda21227792b39af233dc.tar.bz2 | |
x86/irq_work: Make it depend on APIC
The irq work interrupt vector is only installed when CONFIG_X86_LOCAL_APIC is
enabled, but the interrupt handler is compiled in unconditionally.
Compile the cruft out when the APIC is disabled.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170828064957.691909010@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/irq_work.h | 8 | ||||
| -rw-r--r-- | arch/x86/kernel/irq_work.c | 4 |
2 files changed, 10 insertions, 2 deletions
diff --git a/arch/x86/include/asm/irq_work.h b/arch/x86/include/asm/irq_work.h index f70604125286..ddbb8ea0f5a9 100644 --- a/arch/x86/include/asm/irq_work.h +++ b/arch/x86/include/asm/irq_work.h @@ -3,9 +3,17 @@ #include <asm/cpufeature.h> +#ifdef CONFIG_X86_LOCAL_APIC static inline bool arch_irq_work_has_interrupt(void) { return boot_cpu_has(X86_FEATURE_APIC); } +extern void arch_irq_work_raise(void); +#else +static inline bool arch_irq_work_has_interrupt(void) +{ + return false; +} +#endif #endif /* _ASM_IRQ_WORK_H */ diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c index 8054caee401f..70dee056f92b 100644 --- a/arch/x86/kernel/irq_work.c +++ b/arch/x86/kernel/irq_work.c @@ -11,6 +11,7 @@ #include <asm/trace/irq_vectors.h> #include <linux/interrupt.h> +#ifdef CONFIG_X86_LOCAL_APIC __visible void __irq_entry smp_irq_work_interrupt(struct pt_regs *regs) { ipi_entering_ack_irq(); @@ -23,11 +24,10 @@ __visible void __irq_entry smp_irq_work_interrupt(struct pt_regs *regs) void arch_irq_work_raise(void) { -#ifdef CONFIG_X86_LOCAL_APIC if (!arch_irq_work_has_interrupt()) return; apic->send_IPI_self(IRQ_WORK_VECTOR); apic_wait_icr_idle(); -#endif } +#endif |