mirror of
https://github.com/torvalds/linux.git
synced 2024-11-19 02:21:47 +00:00
f433c4aec9
Do not trace arch_local_save_flags(), arch_local_irq_*() and friends. Although they are marked inline, gcc may still make a function out of them and add it to the pool of functions that are traced by the function tracer. This can cause undesirable results (kernel panic, triple faults, etc). Add the notrace notation to prevent them from ever being traced. Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/*
|
|
* Copyright IBM Corp. 2006,2010
|
|
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef __ASM_IRQFLAGS_H
|
|
#define __ASM_IRQFLAGS_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
/* store then OR system mask. */
|
|
#define __arch_local_irq_stosm(__or) \
|
|
({ \
|
|
unsigned long __mask; \
|
|
asm volatile( \
|
|
" stosm %0,%1" \
|
|
: "=Q" (__mask) : "i" (__or) : "memory"); \
|
|
__mask; \
|
|
})
|
|
|
|
/* store then AND system mask. */
|
|
#define __arch_local_irq_stnsm(__and) \
|
|
({ \
|
|
unsigned long __mask; \
|
|
asm volatile( \
|
|
" stnsm %0,%1" \
|
|
: "=Q" (__mask) : "i" (__and) : "memory"); \
|
|
__mask; \
|
|
})
|
|
|
|
/* set system mask. */
|
|
static inline notrace void __arch_local_irq_ssm(unsigned long flags)
|
|
{
|
|
asm volatile("ssm %0" : : "Q" (flags) : "memory");
|
|
}
|
|
|
|
static inline notrace unsigned long arch_local_save_flags(void)
|
|
{
|
|
return __arch_local_irq_stosm(0x00);
|
|
}
|
|
|
|
static inline notrace unsigned long arch_local_irq_save(void)
|
|
{
|
|
return __arch_local_irq_stnsm(0xfc);
|
|
}
|
|
|
|
static inline notrace void arch_local_irq_disable(void)
|
|
{
|
|
arch_local_irq_save();
|
|
}
|
|
|
|
static inline notrace void arch_local_irq_enable(void)
|
|
{
|
|
__arch_local_irq_stosm(0x03);
|
|
}
|
|
|
|
static inline notrace void arch_local_irq_restore(unsigned long flags)
|
|
{
|
|
__arch_local_irq_ssm(flags);
|
|
}
|
|
|
|
static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
|
|
{
|
|
return !(flags & (3UL << (BITS_PER_LONG - 8)));
|
|
}
|
|
|
|
static inline notrace bool arch_irqs_disabled(void)
|
|
{
|
|
return arch_irqs_disabled_flags(arch_local_save_flags());
|
|
}
|
|
|
|
#endif /* __ASM_IRQFLAGS_H */
|