https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 98b1cc82c4affc16f5598d4fa14b1858671b2263 authored by Linus Torvalds on 19 November 2023, 23:02:14 UTC
Linux 6.7-rc2
Linux 6.7-rc2
Tip revision: 98b1cc8
ioremap.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* OpenRISC ioremap.c
*
* Linux architectural port borrowing liberally from similar works of
* others. All original copyrights apply as per the original source
* declaration.
*
* Modifications for the OpenRISC architecture:
* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
*/
#include <linux/vmalloc.h>
#include <linux/io.h>
#include <linux/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/fixmap.h>
#include <asm/bug.h>
#include <linux/sched.h>
#include <asm/tlbflush.h>
extern int mem_init_done;
/*
* OK, this one's a bit tricky... ioremap can get called before memory is
* initialized (early serial console does this) and will want to alloc a page
* for its mapping. No userspace pages will ever get allocated before memory
* is initialized so this applies only to kernel pages. In the event that
* this is called before memory is initialized we allocate the page using
* the memblock infrastructure.
*/
pte_t __ref *pte_alloc_one_kernel(struct mm_struct *mm)
{
pte_t *pte;
if (likely(mem_init_done)) {
pte = (pte_t *)get_zeroed_page(GFP_KERNEL);
} else {
pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
if (!pte)
panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
__func__, PAGE_SIZE, PAGE_SIZE);
}
return pte;
}