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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>
93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* arch/arm/plat-iop/i2c.c
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*
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* Author: Nicolas Pitre <nico@cam.org>
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* Copyright (C) 2001 MontaVista Software, Inc.
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* Copyright (C) 2004 Intel Corporation.
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*/
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <linux/major.h>
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#include <linux/fs.h>
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#include <linux/platform_device.h>
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#include <linux/serial.h>
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#include <linux/tty.h>
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#include <linux/serial_core.h>
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#include <linux/io.h>
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#include <linux/gpio/machine.h>
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#include <asm/page.h>
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#include <asm/mach/map.h>
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#include <asm/setup.h>
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#include <asm/memory.h>
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#include <asm/mach/arch.h>
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#include "hardware.h"
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#include "iop3xx.h"
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#include "irqs.h"
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/*
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* Each of the I2C busses have corresponding GPIO lines, and the driver
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* need to access these directly to drive the bus low at times.
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*/
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struct gpiod_lookup_table iop3xx_i2c0_gpio_lookup = {
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.dev_id = "IOP3xx-I2C.0",
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.table = {
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GPIO_LOOKUP("gpio-iop", 7, "scl", GPIO_ACTIVE_HIGH),
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GPIO_LOOKUP("gpio-iop", 6, "sda", GPIO_ACTIVE_HIGH),
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{ }
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},
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};
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struct gpiod_lookup_table iop3xx_i2c1_gpio_lookup = {
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.dev_id = "IOP3xx-I2C.1",
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.table = {
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GPIO_LOOKUP("gpio-iop", 5, "scl", GPIO_ACTIVE_HIGH),
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GPIO_LOOKUP("gpio-iop", 4, "sda", GPIO_ACTIVE_HIGH),
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{ }
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},
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};
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static struct resource iop3xx_i2c0_resources[] = {
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[0] = {
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.start = 0xfffff680,
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.end = 0xfffff697,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_IOP32X_I2C_0,
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.end = IRQ_IOP32X_I2C_0,
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.flags = IORESOURCE_IRQ,
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},
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};
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struct platform_device iop3xx_i2c0_device = {
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.name = "IOP3xx-I2C",
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.id = 0,
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.num_resources = 2,
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.resource = iop3xx_i2c0_resources,
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};
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static struct resource iop3xx_i2c1_resources[] = {
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[0] = {
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.start = 0xfffff6a0,
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.end = 0xfffff6b7,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_IOP32X_I2C_1,
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.end = IRQ_IOP32X_I2C_1,
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.flags = IORESOURCE_IRQ,
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}
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};
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struct platform_device iop3xx_i2c1_device = {
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.name = "IOP3xx-I2C",
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.id = 1,
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.num_resources = 2,
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.resource = iop3xx_i2c1_resources,
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};
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