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x86/irqwork: Get rid of duplicated tracing interrupt code 

Two NOP5s are a reasonable tradeoff to avoid duplicated code and the
requirement to switch the IDT.

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/20170828064957.064746737@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Thomas Gleixner 2017-08-28 08:47:27 +02:00 committed by Ingo Molnar
parent 61069de7a3
commit daabb8eb9a
2 changed files with 3 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/include/asm/hw_irq.h
View File

@ -48,13 +48,13 @@ extern asmlinkage void call_function_single_interrupt(void);
#ifdef CONFIG_TRACING
/* Interrupt handlers registered during init_IRQ */
extern void trace_irq_work_interrupt(void);
extern void trace_thermal_interrupt(void);
extern void trace_reschedule_interrupt(void);
extern void trace_threshold_interrupt(void);
extern void trace_deferred_error_interrupt(void);
extern void trace_call_function_interrupt(void);
extern void trace_call_function_single_interrupt(void);
#define trace_irq_work_interrupt irq_work_interrupt
#define trace_error_interrupt error_interrupt
#define trace_spurious_interrupt spurious_interrupt
#define trace_x86_platform_ipi x86_platform_ipi

16
arch/x86/kernel/irq_work.c
View File

@ -11,24 +11,12 @@
#include <asm/trace/irq_vectors.h>
#include <linux/interrupt.h>
static inline void __smp_irq_work_interrupt(void)
{
inc_irq_stat(apic_irq_work_irqs);
irq_work_run();
}
__visible void __irq_entry smp_irq_work_interrupt(struct pt_regs *regs)
{
ipi_entering_ack_irq();
__smp_irq_work_interrupt();
exiting_irq();
}
__visible void __irq_entry smp_trace_irq_work_interrupt(struct pt_regs *regs)
{
ipi_entering_ack_irq();
trace_irq_work_entry(IRQ_WORK_VECTOR);
__smp_irq_work_interrupt();
inc_irq_stat(apic_irq_work_irqs);
irq_work_run();
trace_irq_work_exit(IRQ_WORK_VECTOR);
exiting_irq();
}