While checking the results of the :c:func: removal, I noticed that there
was no documentation for request_irq(), and request_threaded_irq() was not
mentioned at all.  Add a kerneldoc comment for request_irq() and add
request_threaded_irq() to the list of functions.

Signed-off-by: Jonathan Corbet <cor...@lwn.net>
---
 Documentation/core-api/genericirq.rst |  2 ++
 include/linux/interrupt.h             | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/Documentation/core-api/genericirq.rst 
b/Documentation/core-api/genericirq.rst
index 2e6c99e3ce3b..8f06d885c310 100644
--- a/Documentation/core-api/genericirq.rst
+++ b/Documentation/core-api/genericirq.rst
@@ -127,6 +127,8 @@ The high-level Driver API consists of following functions:
 
 -  request_irq()
 
+-  request_threaded_irq()
+
 -  free_irq()
 
 -  disable_irq()
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 89fc59dab57d..ba873ec7e09d 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -140,6 +140,19 @@ request_threaded_irq(unsigned int irq, irq_handler_t 
handler,
                     irq_handler_t thread_fn,
                     unsigned long flags, const char *name, void *dev);
 
+/**
+ * request_irq - Add a handler for an interrupt line
+ * @irq:       The interrupt line to allocate
+ * @handler:   Function to be called when the IRQ occurs.
+ *             Primary handler for threaded interrupts
+ *             If NULL, the default primary handler is installed
+ * @flags:     Handling flags
+ * @name:      Name of the device generating this interrupt
+ * @dev:       A cookie passed to the handler function
+ *
+ * This call allocates an interrupt and establishes a handler; see
+ * the documentation for request_threaded_irq() for details.
+ */
 static inline int __must_check
 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
            const char *name, void *dev)
-- 
2.21.0

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