diff options
Diffstat (limited to 'arch/arc/include/asm/irqflags.h')
| -rw-r--r-- | arch/arc/include/asm/irqflags.h | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/arc/include/asm/irqflags.h b/arch/arc/include/asm/irqflags.h index 587df8236e8b..27ecc6975a58 100644 --- a/arch/arc/include/asm/irqflags.h +++ b/arch/arc/include/asm/irqflags.h @@ -15,8 +15,6 @@ * -Conditionally disable interrupts (if they are not enabled, don't disable) */ -#ifdef __KERNEL__ - #include <asm/arcregs.h> /* status32 Reg bits related to Interrupt Handling */ @@ -43,6 +41,15 @@ /****************************************************************** * IRQ Control Macros + * + * All of them have "memory" clobber (compiler barrier) which is needed to + * ensure that LD/ST requiring irq safetly (R-M-W when LLSC is not available) + * are redone after IRQs are re-enabled (and gcc doesn't reuse stale register) + * + * Noted at the time of Abilis Timer List corruption + * Orig Bug + Rejected solution : https://lkml.org/lkml/2013/3/29/67 + * Reasoning : https://lkml.org/lkml/2013/4/8/15 + * ******************************************************************/ /* @@ -169,6 +176,4 @@ static inline int arch_irqs_disabled(void) #endif /* __ASSEMBLY__ */ -#endif /* KERNEL */ - #endif |