Simple helper for synchronous interrupt handlers to use to enable
interrupts if they were taken in interrupt-enabled context.
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 7 +++++++
arch/powerpc/kernel/traps.c | 24 +++++++-----------------
arch/powerpc/mm/fault.c | 4 +---
3 files changed, 15 insertions(+), 20 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h
b/arch/powerpc/include/asm/interrupt.h
index 3a94153ff0d4..021b7e383c97 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -3,6 +3,7 @@
#define _ASM_POWERPC_INTERRUPT_H
#include <linux/context_tracking.h>
+#include <linux/hardirq.h>
#include <asm/ftrace.h>
struct interrupt_state {
@@ -266,4 +267,10 @@ DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
void replay_system_reset(void);
void replay_soft_interrupts(void);
+static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
+{
+ if (!arch_irq_disabled_regs(regs))
+ local_irq_enable();
+}
+
#endif /* _ASM_POWERPC_INTERRUPT_H */
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 3fb5f5dbdb5d..e0d42bb7d73a 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -343,8 +343,8 @@ static bool exception_common(int signr, struct pt_regs
*regs, int code,
show_signal_msg(signr, regs, code, addr);
- if (arch_irqs_disabled() && !arch_irq_disabled_regs(regs))
- local_irq_enable();
+ if (arch_irqs_disabled())
+ interrupt_cond_local_irq_enable(regs);
current->thread.trap_nr = code;
@@ -1575,9 +1575,7 @@ DEFINE_INTERRUPT_HANDLER(program_check_exception)
if (!user_mode(regs))
goto sigill;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
/* (reason & REASON_ILLEGAL) would be the obvious thing here,
* but there seems to be a hardware bug on the 405GP (RevD)
@@ -1631,9 +1629,7 @@ DEFINE_INTERRUPT_HANDLER(alignment_exception)
int sig, code, fixed = 0;
unsigned long reason;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
reason = get_reason(regs);
@@ -1794,9 +1790,7 @@ DEFINE_INTERRUPT_HANDLER(facility_unavailable_exception)
die("Unexpected facility unavailable exception", regs, SIGABRT);
}
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
if (status == FSCR_DSCR_LG) {
/*
@@ -2172,9 +2166,7 @@ void SPEFloatingPointException(struct pt_regs *regs)
int code = FPE_FLTUNK;
int err;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
flush_spe_to_thread(current);
@@ -2221,9 +2213,7 @@ void SPEFloatingPointRoundException(struct pt_regs *regs)
extern int speround_handler(struct pt_regs *regs);
int err;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
preempt_disable();
if (regs->msr & MSR_SPE)
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index d768329a950b..f04d6ef3e358 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -443,9 +443,7 @@ static int __do_page_fault(struct pt_regs *regs, unsigned
long address,
return bad_area_nosemaphore(regs, address);
}
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
--
2.23.0
