include/wrapper/irqflags.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2  *
   3  * wrapper/irqflags.h
   4  *
   5  * wrapper around IRQ flags.
   6  *
   7  * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  */
   9
  10 #ifndef _LTTNG_WRAPPER_IRQFLAGS_H
  11 #define _LTTNG_WRAPPER_IRQFLAGS_H
  12
  13 #include <linux/version.h>
  14 #include <linux/irqflags.h>
  15
  16 #ifdef CONFIG_X86
  17
  18 static inline
  19 int lttng_regs_irqs_disabled(struct pt_regs *regs)
  20 {
  21         unsigned long flags = regs->flags;
  22
  23         return raw_irqs_disabled_flags(flags);
  24 }
  25
  26 #else
  27 /*
  28  * lttng_regs_irqs_disabled() returns -1 if irqoff state is unknown.
  29  * TODO: should implement lttng_regs_irqs_disabled for each architecture
  30  * to add interruptible context for kprobes and kretprobes.
  31  */
  32
  33 static inline
  34 int lttng_regs_irqs_disabled(struct pt_regs *regs)
  35 {
  36         return -1;
  37 }
  38 #endif
  39
  40 #endif /* _LTTNG_WRAPPER_IRQFLAGS_H */