add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/s390/include/asm/isc.h
..
..
@@ -21,6 +21,7 @@
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 /* Adapter interrupts. */
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 #define QDIO_AIRQ_ISC IO_SCH_ISC	/* I/O subchannel in qdio mode */
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 #define PCI_ISC 2			/* PCI I/O subchannels */
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+#define GAL_ISC 5			/* GIB alert */
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 #define AP_ISC 6			/* adjunct processor (crypto) devices */
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 /* Functions for registration of I/O interruption subclasses */