[PATCH] Switch s390 to NO_IOMEM
Martin Schwidefsky wrote: "s390 does not even need (in|out)b(_p|). I wondered what else from io.h do we not need. The answer is: almost nothing. With the devres patch from Al and the dma-mapping patch from Heiko we can get rid of iomem and all associated definitions." So we'll just need to replace NO_IOPORT with NO_IOMEM in Kconfig and kill arch/s390/mm/ioremap.c. BTW, there's an annoying bit of junk in there - IO_SPACE_LIMIT. We only need it for /proc/ioports, which AFAICS shouldn't even be there on s390 (or uml). OTOH, removing that thing would mean a user-visible change - we go from "empty file in /proc" to "no such file in /proc"... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Al Viro
Linus Torvalds
Родитель
5ea8176994
Коммит
23db764d3d
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@ -41,7 +41,7 @@ config GENERIC_HWEIGHT
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config GENERIC_TIME
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def_bool y
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config NO_IOPORT
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config NO_IOMEM
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def_bool y
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mainmenu "Linux Kernel Configuration"
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@ -2,6 +2,6 @@
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# Makefile for the linux s390-specific parts of the memory manager.
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#
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obj-y := init.o fault.o ioremap.o extmem.o mmap.o vmem.o
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obj-y := init.o fault.o extmem.o mmap.o vmem.o
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obj-$(CONFIG_CMM) += cmm.o
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@ -1,58 +0,0 @@
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/*
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* arch/s390/mm/ioremap.c
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*
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* S390 version
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* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Hartmut Penner (hp@de.ibm.com)
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*
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* Derived from "arch/i386/mm/extable.c"
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* (C) Copyright 1995 1996 Linus Torvalds
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*
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* Re-map IO memory to kernel address space so that we can access it.
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* This is needed for high PCI addresses that aren't mapped in the
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* 640k-1MB IO memory area on PC's
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*/
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#include <linux/vmalloc.h>
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#include <linux/mm.h>
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#include <linux/io.h>
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#include <asm/pgalloc.h>
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/*
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* Generic mapping function (not visible outside):
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*/
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/*
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* Remap an arbitrary physical address space into the kernel virtual
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* address space. Needed when the kernel wants to access high addresses
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* directly.
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*/
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void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
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{
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void * addr;
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struct vm_struct * area;
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if (phys_addr < virt_to_phys(high_memory))
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return phys_to_virt(phys_addr);
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if (phys_addr & ~PAGE_MASK)
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return NULL;
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size = PAGE_ALIGN(size);
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if (!size || size > phys_addr + size)
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return NULL;
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area = get_vm_area(size, VM_IOREMAP);
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if (!area)
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return NULL;
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addr = area->addr;
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if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
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phys_addr, __pgprot(flags))) {
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vfree(addr);
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return NULL;
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}
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return addr;
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}
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void iounmap(void *addr)
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{
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if (addr > high_memory)
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vfree(addr);
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}
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@ -13,7 +13,6 @@
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#ifdef __KERNEL__
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#include <linux/vmalloc.h>
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#include <asm/page.h>
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#define IO_SPACE_LIMIT 0xffffffff
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@ -41,70 +40,6 @@ static inline void * phys_to_virt(unsigned long address)
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return __io_virt(address);
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}
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extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
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static inline void * ioremap (unsigned long offset, unsigned long size)
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{
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return __ioremap(offset, size, 0);
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}
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/*
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* This one maps high address device memory and turns off caching for that area.
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* it's useful if some control registers are in such an area and write combining
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* or read caching is not desirable:
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*/
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static inline void * ioremap_nocache (unsigned long offset, unsigned long size)
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{
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return __ioremap(offset, size, 0);
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}
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extern void iounmap(void *addr);
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/*
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* IO bus memory addresses are also 1:1 with the physical address
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*/
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#define virt_to_bus virt_to_phys
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#define bus_to_virt phys_to_virt
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/*
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* readX/writeX() are used to access memory mapped devices. On some
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* architectures the memory mapped IO stuff needs to be accessed
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* differently.
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*/
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#define readb(addr) (*(volatile unsigned char *) __io_virt(addr))
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#define readw(addr) (*(volatile unsigned short *) __io_virt(addr))
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#define readl(addr) (*(volatile unsigned int *) __io_virt(addr))
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#define readq(addr) (*(volatile unsigned long long *) __io_virt(addr))
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#define readb_relaxed(addr) readb(addr)
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#define readw_relaxed(addr) readw(addr)
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#define readl_relaxed(addr) readl(addr)
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#define readq_relaxed(addr) readq(addr)
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#define __raw_readb readb
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#define __raw_readw readw
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#define __raw_readl readl
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#define __raw_readq readq
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#define writeb(b,addr) (*(volatile unsigned char *) __io_virt(addr) = (b))
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#define writew(b,addr) (*(volatile unsigned short *) __io_virt(addr) = (b))
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#define writel(b,addr) (*(volatile unsigned int *) __io_virt(addr) = (b))
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#define writeq(b,addr) (*(volatile unsigned long long *) __io_virt(addr) = (b))
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#define __raw_writeb writeb
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#define __raw_writew writew
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#define __raw_writel writel
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#define __raw_writeq writeq
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#define memset_io(a,b,c) memset(__io_virt(a),(b),(c))
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#define memcpy_fromio(a,b,c) memcpy((a),__io_virt(b),(c))
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#define memcpy_toio(a,b,c) memcpy(__io_virt(a),(b),(c))
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#define inb_p(addr) readb(addr)
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#define inb(addr) readb(addr)
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#define outb(x,addr) ((void) writeb(x,addr))
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#define outb_p(x,addr) outb(x,addr)
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#define mmiowb() do { } while (0)
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/*
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