Commit-ID: bbc9d21fc0071c245c19077155ea371092ff0db8
Gitweb: http://git.kernel.org/tip/bbc9d21fc0071c245c19077155ea371092ff0db8
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Tue, 23 Jun 2015 15:01:30 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Fri, 26 Jun 2015 21:32:30 +0200
genirq: Implement irq_set_handler_locked()/irq_set_chip_handler_name_locked()
The main use case for the exisiting __irq_set_*_locked() inlines is to
replace the handler [,chip and name] of an interrupt from a region
which has the irq descriptor lock held, e.g. from the irq_set_type()
callback. The first argument is the irq number, so the functions need
so perform a pointless lookup of the interrupt descriptor for those
cases which have the irq_data pointer handy.
Provide new functions which take an irq_data pointer instead of the
interrupt number, so the lookup of the interrupt descriptor can be
avoided.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Conflicts:
include/linux/irqdesc.h
---
include/linux/irqdesc.h | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index a72bfd9..624a668 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -190,6 +190,47 @@ __irq_set_chip_handler_name_locked(unsigned int irq, struct irq_chip *chip,
desc->name = name;
}
+/**
+ * irq_set_handler_locked - Set irq handler from a locked region
+ * @data: Pointer to the irq_data structure which identifies the irq
+ * @handler: Flow control handler function for this interrupt
+ *
+ * Sets the handler in the irq descriptor associated to @data.
+ *
+ * Must be called with irq_desc locked and valid parameters. Typical
+ * call site is the irq_set_type() callback.
+ */
+static inline void irq_set_handler_locked(struct irq_data *data,
+ irq_flow_handler_t handler)
+{
+ struct irq_desc *desc = irq_data_to_desc(data);
+
+ desc->handle_irq = handler;
+}
+
+/**
+ * irq_set_chip_handler_name_locked - Set chip, handler and name from a locked region
+ * @data: Pointer to the irq_data structure for which the chip is set
+ * @chip: Pointer to the new irq chip
+ * @handler: Flow control handler function for this interrupt
+ * @name: Name of the interrupt
+ *
+ * Replace the irq chip at the proper hierarchy level in @data and
+ * sets the handler and name in the associated irq descriptor.
+ *
+ * Must be called with irq_desc locked and valid parameters.
+ */
+static inline void
+irq_set_chip_handler_name_locked(struct irq_data *data, struct irq_chip *chip,
+ irq_flow_handler_t handler, const char *name)
+{
+ struct irq_desc *desc = irq_data_to_desc(data);
+
+ desc->handle_irq = handler;
+ desc->name = name;
+ data->chip = chip;
+}
+
static inline int irq_balancing_disabled(unsigned int irq)
{
struct irq_desc *desc;
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|