mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 05:36:35 +07:00
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>
118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/* nommu.c: mmu-less memory info files
|
|
*
|
|
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/time.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/mmzone.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/swap.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/hugetlb.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/tlb.h>
|
|
#include <asm/div64.h>
|
|
#include "internal.h"
|
|
|
|
/*
|
|
* display a single region to a sequenced file
|
|
*/
|
|
static int nommu_region_show(struct seq_file *m, struct vm_region *region)
|
|
{
|
|
unsigned long ino = 0;
|
|
struct file *file;
|
|
dev_t dev = 0;
|
|
int flags;
|
|
|
|
flags = region->vm_flags;
|
|
file = region->vm_file;
|
|
|
|
if (file) {
|
|
struct inode *inode = file_inode(region->vm_file);
|
|
dev = inode->i_sb->s_dev;
|
|
ino = inode->i_ino;
|
|
}
|
|
|
|
seq_setwidth(m, 25 + sizeof(void *) * 6 - 1);
|
|
seq_printf(m,
|
|
"%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ",
|
|
region->vm_start,
|
|
region->vm_end,
|
|
flags & VM_READ ? 'r' : '-',
|
|
flags & VM_WRITE ? 'w' : '-',
|
|
flags & VM_EXEC ? 'x' : '-',
|
|
flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p',
|
|
((loff_t)region->vm_pgoff) << PAGE_SHIFT,
|
|
MAJOR(dev), MINOR(dev), ino);
|
|
|
|
if (file) {
|
|
seq_pad(m, ' ');
|
|
seq_file_path(m, file, "");
|
|
}
|
|
|
|
seq_putc(m, '\n');
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* display a list of all the REGIONs the kernel knows about
|
|
* - nommu kernels have a single flat list
|
|
*/
|
|
static int nommu_region_list_show(struct seq_file *m, void *_p)
|
|
{
|
|
struct rb_node *p = _p;
|
|
|
|
return nommu_region_show(m, rb_entry(p, struct vm_region, vm_rb));
|
|
}
|
|
|
|
static void *nommu_region_list_start(struct seq_file *m, loff_t *_pos)
|
|
{
|
|
struct rb_node *p;
|
|
loff_t pos = *_pos;
|
|
|
|
down_read(&nommu_region_sem);
|
|
|
|
for (p = rb_first(&nommu_region_tree); p; p = rb_next(p))
|
|
if (pos-- == 0)
|
|
return p;
|
|
return NULL;
|
|
}
|
|
|
|
static void nommu_region_list_stop(struct seq_file *m, void *v)
|
|
{
|
|
up_read(&nommu_region_sem);
|
|
}
|
|
|
|
static void *nommu_region_list_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
(*pos)++;
|
|
return rb_next((struct rb_node *) v);
|
|
}
|
|
|
|
static const struct seq_operations proc_nommu_region_list_seqop = {
|
|
.start = nommu_region_list_start,
|
|
.next = nommu_region_list_next,
|
|
.stop = nommu_region_list_stop,
|
|
.show = nommu_region_list_show
|
|
};
|
|
|
|
static int __init proc_nommu_init(void)
|
|
{
|
|
proc_create_seq("maps", S_IRUGO, NULL, &proc_nommu_region_list_seqop);
|
|
return 0;
|
|
}
|
|
|
|
fs_initcall(proc_nommu_init);
|