diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-09-08 01:01:14 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-09-08 01:01:14 -0300 |
| commit | e5fd91f1ef340da553f7a79da9540c3db711c937 (patch) | |
| tree | b11842027dc6641da63f4bcc524f8678263304a3 /arch/arc/kernel/smp.c | |
| parent | 2a9b0348e685a63d97486f6749622b61e9e3292f (diff) | |
Linux-libre 4.2-gnu
Diffstat (limited to 'arch/arc/kernel/smp.c')
| -rw-r--r-- | arch/arc/kernel/smp.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c index 6a400b1b0..be13d1242 100644 --- a/arch/arc/kernel/smp.c +++ b/arch/arc/kernel/smp.c @@ -31,7 +31,7 @@ arch_spinlock_t smp_atomic_ops_lock = __ARCH_SPIN_LOCK_UNLOCKED; arch_spinlock_t smp_bitops_lock = __ARCH_SPIN_LOCK_UNLOCKED; #endif -struct plat_smp_ops plat_smp_ops; +struct plat_smp_ops __weak plat_smp_ops; /* XXX: per cpu ? Only needed once in early seconday boot */ struct task_struct *secondary_idle_tsk; @@ -182,7 +182,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle) /* * not supported here */ -int __init setup_profiling_timer(unsigned int multiplier) +int setup_profiling_timer(unsigned int multiplier) { return -EINVAL; } @@ -278,8 +278,10 @@ static void ipi_cpu_stop(void) machine_halt(); } -static inline void __do_IPI(unsigned long msg) +static inline int __do_IPI(unsigned long msg) { + int rc = 0; + switch (msg) { case IPI_RESCHEDULE: scheduler_ipi(); @@ -294,8 +296,10 @@ static inline void __do_IPI(unsigned long msg) break; default: - pr_warn("IPI with unexpected msg %ld\n", msg); + rc = 1; } + + return rc; } /* @@ -305,6 +309,7 @@ static inline void __do_IPI(unsigned long msg) irqreturn_t do_IPI(int irq, void *dev_id) { unsigned long pending; + unsigned long __maybe_unused copy; pr_debug("IPI [%ld] received on cpu %d\n", *this_cpu_ptr(&ipi_data), smp_processor_id()); @@ -316,11 +321,18 @@ irqreturn_t do_IPI(int irq, void *dev_id) * "dequeue" the msg corresponding to this IPI (and possibly other * piggybacked msg from elided IPIs: see ipi_send_msg_one() above) */ - pending = xchg(this_cpu_ptr(&ipi_data), 0); + copy = pending = xchg(this_cpu_ptr(&ipi_data), 0); do { unsigned long msg = __ffs(pending); - __do_IPI(msg); + int rc; + + rc = __do_IPI(msg); +#ifdef CONFIG_ARC_IPI_DBG + /* IPI received but no valid @msg */ + if (rc) + pr_info("IPI with bogus msg %ld in %ld\n", msg, copy); +#endif pending &= ~(1U << msg); } while (pending); |