mm: ioremap: Setup phys_addr of struct vm_struct

Show physical address of each ioremap in /proc/vmallocinfo.
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Link: https://lore.kernel.org/r/20220607125027.44946-4-wangkefeng.wang@huawei.comSigned-off-by: Will Deacon <will@kernel.org>

mm/ioremap.c

@@ -33,6 +33,7 @@ void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
 	if (!area)
 		return NULL;
 	vaddr = (unsigned long)area->addr;
+	area->phys_addr = phys_addr;
 
 	if (ioremap_page_range(vaddr, vaddr + size, phys_addr,
 			       __pgprot(prot))) {