mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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e31cf2f4ca
Patch series "mm: consolidate definitions of page table accessors", v2.
The low level page table accessors (pXY_index(), pXY_offset()) are
duplicated across all architectures and sometimes more than once. For
instance, we have 31 definition of pgd_offset() for 25 supported
architectures.
Most of these definitions are actually identical and typically it boils
down to, e.g.
static inline unsigned long pmd_index(unsigned long address)
{
return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
}
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
}
These definitions can be shared among 90% of the arches provided
XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined.
For architectures that really need a custom version there is always
possibility to override the generic version with the usual ifdefs magic.
These patches introduce include/linux/pgtable.h that replaces
include/asm-generic/pgtable.h and add the definitions of the page table
accessors to the new header.
This patch (of 12):
The linux/mm.h header includes <asm/pgtable.h> to allow inlining of the
functions involving page table manipulations, e.g. pte_alloc() and
pmd_alloc(). So, there is no point to explicitly include <asm/pgtable.h>
in the files that include <linux/mm.h>.
The include statements in such cases are remove with a simple loop:
for f in $(git grep -l "include <linux/mm.h>") ; do
sed -i -e '/include <asm\/pgtable.h>/ d' $f
done
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
174 lines
4 KiB
C
174 lines
4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* -*- mode: c; c-basic-offset: 8 -*- */
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/* PARISC LASI driver for the 53c700 chip
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*
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* Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
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**-----------------------------------------------------------------------------
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**
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**
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**-----------------------------------------------------------------------------
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*/
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/*
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* Many thanks to Richard Hirst <rhirst@linuxcare.com> for patiently
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* debugging this driver on the parisc architecture and suggesting
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* many improvements and bug fixes.
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*
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* Thanks also go to Linuxcare Inc. for providing several PARISC
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* machines for me to debug the driver on.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/stat.h>
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#include <linux/mm.h>
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#include <linux/blkdev.h>
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#include <linux/ioport.h>
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#include <linux/dma-mapping.h>
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#include <linux/slab.h>
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#include <asm/page.h>
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#include <asm/irq.h>
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#include <asm/hardware.h>
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#include <asm/parisc-device.h>
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#include <asm/delay.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_spi.h>
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#include "53c700.h"
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MODULE_AUTHOR("James Bottomley");
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MODULE_DESCRIPTION("lasi700 SCSI Driver");
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MODULE_LICENSE("GPL");
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#define LASI_700_SVERSION 0x00071
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#define LASI_710_SVERSION 0x00082
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#define LASI700_ID_TABLE { \
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.hw_type = HPHW_FIO, \
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.sversion = LASI_700_SVERSION, \
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.hversion = HVERSION_ANY_ID, \
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.hversion_rev = HVERSION_REV_ANY_ID, \
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}
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#define LASI710_ID_TABLE { \
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.hw_type = HPHW_FIO, \
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.sversion = LASI_710_SVERSION, \
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.hversion = HVERSION_ANY_ID, \
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.hversion_rev = HVERSION_REV_ANY_ID, \
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}
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#define LASI700_CLOCK 25
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#define LASI710_CLOCK 40
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#define LASI_SCSI_CORE_OFFSET 0x100
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static const struct parisc_device_id lasi700_ids[] __initconst = {
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LASI700_ID_TABLE,
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LASI710_ID_TABLE,
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{ 0 }
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};
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static struct scsi_host_template lasi700_template = {
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.name = "LASI SCSI 53c700",
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.proc_name = "lasi700",
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.this_id = 7,
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.module = THIS_MODULE,
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};
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MODULE_DEVICE_TABLE(parisc, lasi700_ids);
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static int __init
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lasi700_probe(struct parisc_device *dev)
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{
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unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;
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struct NCR_700_Host_Parameters *hostdata;
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struct Scsi_Host *host;
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hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
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if (!hostdata) {
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dev_printk(KERN_ERR, &dev->dev, "Failed to allocate host data\n");
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return -ENOMEM;
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}
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hostdata->dev = &dev->dev;
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dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
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hostdata->base = ioremap(base, 0x100);
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hostdata->differential = 0;
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if (dev->id.sversion == LASI_700_SVERSION) {
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hostdata->clock = LASI700_CLOCK;
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hostdata->force_le_on_be = 1;
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} else {
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hostdata->clock = LASI710_CLOCK;
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hostdata->force_le_on_be = 0;
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hostdata->chip710 = 1;
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hostdata->dmode_extra = DMODE_FC2;
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hostdata->burst_length = 8;
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}
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host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);
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if (!host)
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goto out_kfree;
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host->this_id = 7;
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host->base = base;
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host->irq = dev->irq;
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if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {
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printk(KERN_ERR "lasi700: request_irq failed!\n");
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goto out_put_host;
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}
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dev_set_drvdata(&dev->dev, host);
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scsi_scan_host(host);
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return 0;
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out_put_host:
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scsi_host_put(host);
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out_kfree:
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iounmap(hostdata->base);
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kfree(hostdata);
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return -ENODEV;
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}
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static int __exit
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lasi700_driver_remove(struct parisc_device *dev)
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{
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struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
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struct NCR_700_Host_Parameters *hostdata =
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(struct NCR_700_Host_Parameters *)host->hostdata[0];
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scsi_remove_host(host);
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NCR_700_release(host);
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free_irq(host->irq, host);
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iounmap(hostdata->base);
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kfree(hostdata);
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return 0;
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}
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static struct parisc_driver lasi700_driver __refdata = {
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.name = "lasi_scsi",
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.id_table = lasi700_ids,
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.probe = lasi700_probe,
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.remove = __exit_p(lasi700_driver_remove),
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};
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static int __init
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lasi700_init(void)
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{
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return register_parisc_driver(&lasi700_driver);
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}
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static void __exit
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lasi700_exit(void)
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{
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unregister_parisc_driver(&lasi700_driver);
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}
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module_init(lasi700_init);
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module_exit(lasi700_exit);
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