kernel/resource: move and rename IORESOURCE_MEM_DRIVER_MANAGED

IORESOURCE_MEM_DRIVER_MANAGED currently uses an unused PnP bit, which is
always set to 0 by hardware. This is far from beautiful (and confusing),
and the bit only applies to SYSRAM. So let's move it out of the
bus-specific (PnP) defined bits.

We'll add another SYSRAM specific bit soon. If we ever need more bits for
other purposes, we can steal some from "desc", or reshuffle/regroup what
we have.

Signed-off-by: David Hildenbrand <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Cc: Michal Hocko <[e-mail]>
Cc: Dan Williams <[e-mail]>
Cc: Jason Gunthorpe <[e-mail]>
Cc: Kees Cook <[e-mail]>
Cc: Ard Biesheuvel <[e-mail]>
Cc: Pankaj Gupta <[e-mail]>
Cc: Baoquan He <[e-mail]>
Cc: Wei Yang <[e-mail]>
Cc: Eric Biederman <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Cc: Greg Kroah-Hartman <[e-mail]>
Cc: Anton Blanchard <[e-mail]>
Cc: Benjamin Herrenschmidt <[e-mail]>
Cc: Boris Ostrovsky <[e-mail]>
Cc: Christian Borntraeger <[e-mail]>
Cc: Dave Jiang <[e-mail]>
Cc: Haiyang Zhang <[e-mail]>
Cc: Heiko Carstens <[e-mail]>
Cc: Jason Wang <[e-mail]>
Cc: Juergen Gross <[e-mail]>
Cc: Julien Grall <[e-mail]>
Cc: "K. Y. Srinivasan" <[e-mail]>
Cc: Len Brown <[e-mail]>
Cc: Leonardo Bras <[e-mail]>
Cc: Libor Pechacek <[e-mail]>
Cc: Michael Ellerman <[e-mail]>
Cc: "Michael S. Tsirkin" <[e-mail]>
Cc: Nathan Lynch <[e-mail]>
Cc: "Oliver O'Halloran" <[e-mail]>
Cc: Paul Mackerras <[e-mail]>
Cc: Pingfan Liu <[e-mail]>
Cc: "Rafael J. Wysocki" <[e-mail]>
Cc: Roger Pau Monné <[e-mail]>
Cc: Stefano Stabellini <[e-mail]>
Cc: Stephen Hemminger <[e-mail]>
Cc: Vasily Gorbik <[e-mail]>
Cc: Vishal Verma <[e-mail]>
Cc: Wei Liu <[e-mail]>
Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Linus Torvalds <[e-mail]>

include/linux/ioport.h

···
 #define IORESOURCE_EXT_TYPE_BITS 0x01000000	/* Resource extended types */
 #define IORESOURCE_SYSRAM	0x01000000	/* System RAM (modifier) */
 
+/* IORESOURCE_SYSRAM specific bits. */
+#define IORESOURCE_SYSRAM_DRIVER_MANAGED	0x02000000 /* Always detected via a driver. */
+
 #define IORESOURCE_EXCLUSIVE	0x08000000	/* Userland may not map this resource */
 
 #define IORESOURCE_DISABLED	0x10000000
···
 #define IORESOURCE_MEM_32BIT		(3<<3)
 #define IORESOURCE_MEM_SHADOWABLE	(1<<5)	/* dup: IORESOURCE_SHADOWABLE */
 #define IORESOURCE_MEM_EXPANSIONROM	(1<<6)
-#define IORESOURCE_MEM_DRIVER_MANAGED	(1<<7)
 
 /* PnP I/O specific bits (IORESOURCE_BITS) */
 #define IORESOURCE_IO_16BIT_ADDR	(1<<0)

kernel/kexec_file.c

···
 	/* Returning 0 will take to next memory range */
 
 	/* Don't use memory that will be detected and handled by a driver. */
-	if (res->flags & IORESOURCE_MEM_DRIVER_MANAGED)
+	if (res->flags & IORESOURCE_SYSRAM_DRIVER_MANAGED)
 		return 0;
 
 	if (sz < kbuf->memsz)

mm/memory_hotplug.c

···
 	unsigned long flags =  IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
 
 	if (strcmp(resource_name, "System RAM"))
-		flags |= IORESOURCE_MEM_DRIVER_MANAGED;
+		flags |= IORESOURCE_SYSRAM_DRIVER_MANAGED;
 
 	/*
 	 * Make sure value parsed from 'mem=' only restricts memory adding
···
  *
  * For this memory, no entries in /sys/firmware/memmap ("raw firmware-provided
  * memory map") are created. Also, the created memory resource is flagged
- * with IORESOURCE_MEM_DRIVER_MANAGED, so in-kernel users can special-case
+ * with IORESOURCE_SYSRAM_DRIVER_MANAGED, so in-kernel users can special-case
  * this memory as well (esp., not place kexec images onto it).
  *
  * The resource_name (visible via /proc/iomem) has to have the format