/*
* Internal header to deal with irq_desc->status which will be renamed
* to irq_desc->settings.
*/
enum {
_IRQ_DEFAULT_INIT_FLAGS = IRQ_DEFAULT_INIT_FLAGS,
_IRQ_PER_CPU = IRQ_PER_CPU,
_IRQ_LEVEL = IRQ_LEVEL,
_IRQ_NOPROBE = IRQ_NOPROBE,
_IRQ_NOREQUEST = IRQ_NOREQUEST,
_IRQ_NOTHREAD = IRQ_NOTHREAD,
_IRQ_NOAUTOEN = IRQ_NOAUTOEN,
_IRQ_MOVE_PCNTXT = IRQ_MOVE_PCNTXT,
_IRQ_NO_BALANCING = IRQ_NO_BALANCING,
_IRQ_NESTED_THREAD = IRQ_NESTED_THREAD,
_IRQ_PER_CPU_DEVID = IRQ_PER_CPU_DEVID,
_IRQ_IS_POLLED = IRQ_IS_POLLED,
_IRQ_DISABLE_UNLAZY = IRQ_DISABLE_UNLAZY,
_IRQF_MODIFY_MASK = IRQF_MODIFY_MASK,
};
#define IRQ_PER_CPU GOT_YOU_MORON
#define IRQ_NO_BALANCING GOT_YOU_MORON
#define IRQ_LEVEL GOT_YOU_MORON
#define IRQ_NOPROBE GOT_YOU_MORON
#define IRQ_NOREQUEST GOT_YOU_MORON
#define IRQ_NOTHREAD GOT_YOU_MORON
#define IRQ_NOAUTOEN GOT_YOU_MORON
#define IRQ_NESTED_THREAD GOT_YOU_MORON
#define IRQ_PER_CPU_DEVID GOT_YOU_MORON
#define IRQ_IS_POLLED GOT_YOU_MORON
#define IRQ_DISABLE_UNLAZY GOT_YOU_MORON
#undef IRQF_MODIFY_MASK
#define IRQF_MODIFY_MASK GOT_YOU_MORON
static inline void
irq_settings_clr_and_set(struct irq_desc *desc, u32 clr, u32 set)
{
desc->status_use_accessors &= ~(clr & _IRQF_MODIFY_MASK);
desc->status_use_accessors |= (set & _IRQF_MODIFY_MASK);
}
static inline bool irq_settings_is_per_cpu(struct irq_desc *desc)
{
return desc->status_use_accessors & _IRQ_PER_CPU;
}
static inline bool irq_settings_is_per_cpu_devid(struct irq_desc *desc)
{
return desc->status_use_accessors & _IRQ_PER_CPU_DEVID;
}
static inline void irq_settings_set_per_cpu(struct irq_desc *desc)
{
desc->status_use_accessors |= _IRQ_PER_CPU;
}
static inline void irq_settings_set_no_balancing(struct irq_desc *desc)
{
desc->status_use_accessors |= _IRQ_NO_BALANCING;
}
static inline bool irq_settings_has_no_balance_set(struct irq_desc *desc)
{
return desc->status_use_accessors & _IRQ_NO_BALANCING;
}
static inline u32 irq_settings_get_trigger_mask(struct irq_desc *desc)
{
return desc->status_use_accessors & IRQ_TYPE_SENSE_MASK;
}
static inline void
irq_settings_set_trigger_mask(struct irq_desc *desc, u32 mask)
{
desc->status_use_accessors &= ~IRQ_TYPE_SENSE_MASK;
desc->status_use_accessors |= mask & IRQ_TYPE_SENSE_MASK;
}
static inline bool irq_settings_is_level(struct irq_desc *desc)
{
return desc->status_use_accessors & _IRQ_LEVEL;
}
static inline void irq_settings_clr_level(struct irq_desc *desc)
{
desc->status_use_accessors &= ~_IRQ_LEVEL;
}
static inline void irq_settings_set_level(struct irq_desc *desc)
{
desc->status_use_accessors |= _IRQ_LEVEL;
}
static inline bool irq_settings_can_request(struct irq_desc *desc)
{
return !(desc->status_use_accessors & _IRQ_NOREQUEST);
}
static inline void irq_settings_clr_norequest(struct irq_desc *desc)
{
desc->status_use_accessors &= ~_IRQ_NOREQUEST;
}
static inline void irq_settings_set_norequest(struct irq_desc *desc)
{
desc->status_use_accessors |= _IRQ_NOREQUEST;
}
static inline bool irq_settings_can_thread(struct irq_desc *desc)
{
return !(desc->status_use_accessors & _IRQ_NOTHREAD);
}
static inline void irq_settings_clr_nothread(struct irq_desc *desc)
{
desc->status_use_accessors &= ~_IRQ_NOTHREAD;
}
static inline void irq_settings_set_nothread(struct irq_desc *desc)
{
desc->status_use_accessors |= _IRQ_NOTHREAD;
}
static inline bool irq_settings_can_probe(struct irq_desc *desc)
{
return !(desc->status_use_accessors & _IRQ_NOPROBE);
}
static inline void irq_settings_clr_noprobe(struct irq_desc *desc)
{
desc->status_use_accessors &= ~_IRQ_NOPROBE;
}
static inline void irq_settings_set_noprobe(struct irq_desc *desc)
{
desc->status_use_accessors |= _IRQ_NOPROBE;
}
static inline bool irq_settings_can_move_pcntxt(struct irq_desc *desc)
{
return desc->status_use_accessors & _IRQ_MOVE_PCNTXT;
}
static inline bool irq_settings_can_autoenable(struct irq_desc *desc)
{
return !(desc->status_use_accessors & _IRQ_NOAUTOEN);
}
static inline bool irq_settings_is_nested_thread(struct irq_desc *desc)
{
return desc->status_use_accessors & _IRQ_NESTED_THREAD;
}
static inline bool irq_settings_is_polled(struct irq_desc *desc)
{
return desc->status_use_accessors & _IRQ_IS_POLLED;
}
static inline bool irq_settings_disable_unlazy(struct irq_desc *desc)
{
return desc->status_use_accessors & _IRQ_DISABLE_UNLAZY;
}
static inline void irq_settings_clr_disable_unlazy(struct irq_desc *desc)
{
desc->status_use_accessors &= ~_IRQ_DISABLE_UNLAZY;
}
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is
pinned to a single CPU and will move to the next CPU after each period of
running. If the user modifies the migration thread's affinity, it will not
change after that happens.
The original code created the thread at the first instance it was called,
but later was changed to destroy the thread after the tracer was finished,
and would not be created until the next instance of the tracer was
established. The code that initialized the affinity was only called on the
initial instantiation of the tracer. After that, it was not initialized, and
the previous affinity did not match the current newly created one, making
it appear that the user modified the thread's affinity when it did not, and
the thread failed to migrate again.
Cc: stable@vger.kernel.org
Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>