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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>
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* arch/arm/mach-imx/mm-imx27.c
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*
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* Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
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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/pinctrl/machine.h>
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#include <asm/mach/map.h>
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#include "common.h"
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#include "devices/devices-common.h"
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#include "hardware.h"
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#include "iomux-v1.h"
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/* MX27 memory map definition */
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static struct map_desc imx27_io_desc[] __initdata = {
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/*
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* this fixed mapping covers:
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* - AIPI1
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* - AIPI2
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* - AITC
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* - ROM Patch
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* - and some reserved space
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*/
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imx_map_entry(MX27, AIPI, MT_DEVICE),
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/*
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* this fixed mapping covers:
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* - CSI
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* - ATA
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*/
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imx_map_entry(MX27, SAHB1, MT_DEVICE),
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/*
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* this fixed mapping covers:
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* - EMI
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*/
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imx_map_entry(MX27, X_MEMC, MT_DEVICE),
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};
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/*
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* Initialize the memory map. It is called during the
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* system startup to create static physical to virtual
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* memory map for the IO modules.
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*/
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void __init mx27_map_io(void)
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{
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iotable_init(imx27_io_desc, ARRAY_SIZE(imx27_io_desc));
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}
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void __init imx27_init_early(void)
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{
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mxc_set_cpu_type(MXC_CPU_MX27);
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imx_iomuxv1_init(MX27_IO_ADDRESS(MX27_GPIO_BASE_ADDR),
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MX27_NUM_GPIO_PORT);
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}
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void __init mx27_init_irq(void)
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{
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mxc_init_irq(MX27_IO_ADDRESS(MX27_AVIC_BASE_ADDR));
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}
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static const struct resource imx27_audmux_res[] __initconst = {
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DEFINE_RES_MEM(MX27_AUDMUX_BASE_ADDR, SZ_4K),
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};
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void __init imx27_soc_init(void)
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{
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mxc_arch_reset_init(MX27_IO_ADDRESS(MX27_WDOG_BASE_ADDR));
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mxc_device_init();
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/* i.mx27 has the i.mx21 type gpio */
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mxc_register_gpio("imx21-gpio", 0, MX27_GPIO1_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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mxc_register_gpio("imx21-gpio", 1, MX27_GPIO2_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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mxc_register_gpio("imx21-gpio", 2, MX27_GPIO3_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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mxc_register_gpio("imx21-gpio", 3, MX27_GPIO4_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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mxc_register_gpio("imx21-gpio", 4, MX27_GPIO5_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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mxc_register_gpio("imx21-gpio", 5, MX27_GPIO6_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
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pinctrl_provide_dummies();
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imx_add_imx_dma("imx27-dma", MX27_DMA_BASE_ADDR,
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MX27_INT_DMACH0, 0); /* No ERR irq */
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/* imx27 has the imx21 type audmux */
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platform_device_register_simple("imx21-audmux", 0, imx27_audmux_res,
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ARRAY_SIZE(imx27_audmux_res));
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imx27_pm_init();
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}
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