From 38af57825313f6c9404b42c4e4fa22311f60383a Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 13 Aug 2019 11:27:56 +0200
Subject: riscv: use the generic ioremap code

Use the generic ioremap code instead of providing a local version.
Note that this relies on the asm-generic no-op definition of
pgprot_noncached.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Paul Walmsley <paul.walmsley@sifive.com>
Tested-by: Paul Walmsley <paul.walmsley@sifive.com> # rv32, rv64 boot
Acked-by: Paul Walmsley <paul.walmsley@sifive.com> # arch/riscv
---
 arch/riscv/mm/Makefile  |  1 -
 arch/riscv/mm/ioremap.c | 84 -------------------------------------------------
 2 files changed, 85 deletions(-)
 delete mode 100644 arch/riscv/mm/ioremap.c

(limited to 'arch/riscv/mm')

diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile
index 9d9a17335686..b3a356c80c1f 100644
--- a/arch/riscv/mm/Makefile
+++ b/arch/riscv/mm/Makefile
@@ -8,7 +8,6 @@ endif
 obj-y += init.o
 obj-y += fault.o
 obj-y += extable.o
-obj-y += ioremap.o
 obj-y += cacheflush.o
 obj-y += context.o
 obj-y += sifive_l2_cache.o
diff --git a/arch/riscv/mm/ioremap.c b/arch/riscv/mm/ioremap.c
deleted file mode 100644
index ac621ddb45c0..000000000000
--- a/arch/riscv/mm/ioremap.c
+++ /dev/null
@@ -1,84 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * (C) Copyright 1995 1996 Linus Torvalds
- * (C) Copyright 2012 Regents of the University of California
- */
-
-#include <linux/export.h>
-#include <linux/mm.h>
-#include <linux/vmalloc.h>
-#include <linux/io.h>
-
-#include <asm/pgtable.h>
-
-/*
- * Remap an arbitrary physical address space into the kernel virtual
- * address space. Needed when the kernel wants to access high addresses
- * directly.
- *
- * NOTE! We need to allow non-page-aligned mappings too: we will obviously
- * have to convert them into an offset in a page-aligned mapping, but the
- * caller shouldn't need to know that small detail.
- */
-static void __iomem *__ioremap_caller(phys_addr_t addr, size_t size,
-	pgprot_t prot, void *caller)
-{
-	phys_addr_t last_addr;
-	unsigned long offset, vaddr;
-	struct vm_struct *area;
-
-	/* Disallow wrap-around or zero size */
-	last_addr = addr + size - 1;
-	if (!size || last_addr < addr)
-		return NULL;
-
-	/* Page-align mappings */
-	offset = addr & (~PAGE_MASK);
-	addr -= offset;
-	size = PAGE_ALIGN(size + offset);
-
-	area = get_vm_area_caller(size, VM_IOREMAP, caller);
-	if (!area)
-		return NULL;
-	vaddr = (unsigned long)area->addr;
-
-	if (ioremap_page_range(vaddr, vaddr + size, addr, prot)) {
-		free_vm_area(area);
-		return NULL;
-	}
-
-	return (void __iomem *)(vaddr + offset);
-}
-
-/*
- * ioremap     -   map bus memory into CPU space
- * @offset:    bus address of the memory
- * @size:      size of the resource to map
- *
- * ioremap performs a platform specific sequence of operations to
- * make bus memory CPU accessible via the readb/readw/readl/writeb/
- * writew/writel functions and the other mmio helpers. The returned
- * address is not guaranteed to be usable directly as a virtual
- * address.
- *
- * Must be freed with iounmap.
- */
-void __iomem *ioremap(phys_addr_t offset, unsigned long size)
-{
-	return __ioremap_caller(offset, size, PAGE_KERNEL,
-		__builtin_return_address(0));
-}
-EXPORT_SYMBOL(ioremap);
-
-
-/**
- * iounmap - Free a IO remapping
- * @addr: virtual address from ioremap_*
- *
- * Caller must ensure there is only one unmapping for the same pointer.
- */
-void iounmap(volatile void __iomem *addr)
-{
-	vunmap((void *)((unsigned long)addr & PAGE_MASK));
-}
-EXPORT_SYMBOL(iounmap);
-- 
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