mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-19 10:14:23 +08:00
b6531456ba
Some headers rely on PAGE_* definitions from <asm/page.h>, but cannot include this due to potential circular includes. For example, a number of definitions in <asm/memory.h> rely on PAGE_SHIFT, and <asm/page.h> includes <asm/memory.h>. This requires users of these definitions to include both headers, which is fragile and error-prone. This patch ameliorates matters by moving the basic definitions out to a new header, <asm/page-def.h>. Both <asm/page.h> and <asm/memory.h> are updated to include this, avoiding this fragility, and avoiding the possibility of circular include dependencies. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Will Deacon <will.deacon@arm.com> Tested-by: Laura Abbott <labbott@redhat.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: James Morse <james.morse@arm.com>
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
|
|
* Based on arch/arm/include/asm/page.h
|
|
*
|
|
* Copyright (C) 1995-2003 Russell King
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef __ASM_PAGE_H
|
|
#define __ASM_PAGE_H
|
|
|
|
#include <asm/page-def.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/personality.h> /* for READ_IMPLIES_EXEC */
|
|
#include <asm/pgtable-types.h>
|
|
|
|
extern void __cpu_clear_user_page(void *p, unsigned long user);
|
|
extern void __cpu_copy_user_page(void *to, const void *from,
|
|
unsigned long user);
|
|
extern void copy_page(void *to, const void *from);
|
|
extern void clear_page(void *to);
|
|
|
|
#define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr)
|
|
#define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr)
|
|
|
|
typedef struct page *pgtable_t;
|
|
|
|
#ifdef CONFIG_HAVE_ARCH_PFN_VALID
|
|
extern int pfn_valid(unsigned long);
|
|
#endif
|
|
|
|
#include <asm/memory.h>
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS \
|
|
(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
|
|
VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#include <asm-generic/getorder.h>
|
|
|
|
#endif
|