x86, kexec, nvdimm: Use walk_iomem_res_desc() for iomem search

Change the callers of walk_iomem_res() scanning for the
following resources by name to use walk_iomem_res_desc()
instead.

"ACPI Tables"
"ACPI Non-volatile Storage"
"Persistent Memory (legacy)"
"Crash kernel"

Note, the caller of walk_iomem_res() with "GART" will be removed
in a later patch.

Signed-off-by: Toshi Kani <[e-mail]>
Signed-off-by: Borislav Petkov <[e-mail]>
Reviewed-by: Dave Young <[e-mail]>
Cc: Andrew Morton <[e-mail]>
Cc: Andy Lutomirski <[e-mail]>
Cc: Andy Lutomirski <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: Brian Gerst <[e-mail]>
Cc: Chun-Yi <[e-mail]>
Cc: Dan Williams <[e-mail]>
Cc: Denys Vlasenko <[e-mail]>
Cc: Don Zickus <[e-mail]>
Cc: H. Peter Anvin <[e-mail]>
Cc: Lee, Chun-Yi <[e-mail]>
Cc: Linus Torvalds <[e-mail]>
Cc: Luis R. Rodriguez <[e-mail]>
Cc: Minfei Huang <[e-mail]>
Cc: Peter Zijlstra (Intel) <[e-mail]>
Cc: Ross Zwisler <[e-mail]>
Cc: Stephen Rothwell <[e-mail]>
Cc: Takao Indoh <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Cc: Toshi Kani <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: linux-mm <[e-mail]>
Cc: [e-mail]
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Ingo Molnar <[e-mail]>

arch/x86/kernel/crash.c

···
 	/* Add ACPI tables */
 	cmd.type = E820_ACPI;
 	flags = IORESOURCE_MEM | IORESOURCE_BUSY;
-	walk_iomem_res("ACPI Tables", flags, 0, -1, &cmd,
+	walk_iomem_res_desc(IORES_DESC_ACPI_TABLES, flags, 0, -1, &cmd,
 		       memmap_entry_callback);
 
 	/* Add ACPI Non-volatile Storage */
 	cmd.type = E820_NVS;
-	walk_iomem_res("ACPI Non-volatile Storage", flags, 0, -1, &cmd,
+	walk_iomem_res_desc(IORES_DESC_ACPI_NV_STORAGE, flags, 0, -1, &cmd,
 			memmap_entry_callback);
 
 	/* Add crashk_low_res region */

arch/x86/kernel/pmem.c

···
 
 static __init int register_e820_pmem(void)
 {
-	char *pmem = "Persistent Memory (legacy)";
 	struct platform_device *pdev;
 	int rc;
 
-	rc = walk_iomem_res(pmem, IORESOURCE_MEM, 0, -1, NULL, found);
+	rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY,
+				 IORESOURCE_MEM, 0, -1, NULL, found);
 	if (rc <= 0)
 		return 0;
 

drivers/nvdimm/e820.c

···
 	for (p = iomem_resource.child; p ; p = p->sibling) {
 		struct nd_region_desc ndr_desc;
 
-		if (strncmp(p->name, "Persistent Memory (legacy)", 26) != 0)
+		if (p->desc != IORES_DESC_PERSISTENT_MEMORY_LEGACY)
 			continue;
 
 		memset(&ndr_desc, 0, sizeof(ndr_desc));

kernel/kexec_file.c

···
 
 	/* Walk the RAM ranges and allocate a suitable range for the buffer */
 	if (image->type == KEXEC_TYPE_CRASH)
-		ret = walk_iomem_res("Crash kernel",
-				     IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY,
-				     crashk_res.start, crashk_res.end, kbuf,
-				     locate_mem_hole_callback);
+		ret = walk_iomem_res_desc(crashk_res.desc,
+				IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY,
+				crashk_res.start, crashk_res.end, kbuf,
+				locate_mem_hole_callback);
 	else
 		ret = walk_system_ram_res(0, -1, kbuf,
 					  locate_mem_hole_callback);