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2024-11-01 7e970c18f85f99acc678d90128b6e01dce1bf273

 kernel/kernel/irq/irqdesc.c
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@@ -16,6 +16,7 @@
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 #include <linux/bitmap.h>
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 #include <linux/irqdomain.h>
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 #include <linux/sysfs.h>
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+#include <linux/irq_pipeline.h>
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 #include "internals.h"
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@@ -453,6 +454,7 @@
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 	 * irq_sysfs_init() as well.
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 	 */
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 	irq_sysfs_del(desc);
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+	uncache_irq_desc(irq);
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 	delete_irq_desc(irq);
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 	/*
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@@ -633,9 +635,12 @@
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 #endif /* !CONFIG_SPARSE_IRQ */
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 /**
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- * generic_handle_irq - Invoke the handler for a particular irq
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+ * generic_handle_irq - Handle a particular irq
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  * @irq:	The irq number to handle
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  *
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+ * The handler is invoked, unless we are entering the interrupt
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+ * pipeline, in which case the incoming IRQ is only scheduled for
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+ * deferred delivery.
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  */
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 int generic_handle_irq(unsigned int irq)
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 {
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@@ -646,7 +651,7 @@
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 		return -EINVAL;
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 	data = irq_desc_get_irq_data(desc);
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-	if (WARN_ON_ONCE(!in_irq() && handle_enforce_irqctx(data)))
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+	if (WARN_ON_ONCE(!in_hard_irq() && handle_enforce_irqctx(data)))
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 		return -EPERM;
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 	generic_handle_irq_desc(desc);