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6215d9f447
Reduce 22 declarations of empty_zero_page to 3 and 23 declarations of ZERO_PAGE() to 4. Every architecture defines empty_zero_page that way or another, but for the most of them it is always a page aligned page in BSS and most definitions of ZERO_PAGE do virt_to_page(empty_zero_page). Move Linus vetted x86 definition of empty_zero_page and ZERO_PAGE() to the core MM and drop these definitions in architectures that do not implement colored zero page (MIPS and s390). ZERO_PAGE() remains a macro because turning it to a wrapper for a static inline causes severe pain in header dependencies. For the most part the change is mechanical, with these being noteworthy: * alpha: aliased empty_zero_page with ZERO_PGE that was also used for boot parameters. Switching to a generic empty_zero_page removes the aliasing and keeps ZERO_PGE for boot parameters only * arm64: uses __pa_symbol() in ZERO_PAGE() so that definition of ZERO_PAGE() is kept intact. * m68k/parisc/um: allocated empty_zero_page from memblock, although they do not support zero page coloring and having it in BSS will work fine. * sparc64 can have empty_zero_page in BSS rather allocate it, but it can't use virt_to_page() for BSS. Keep it's definition of ZERO_PAGE() but instead of allocating it, make mem_map_zero point to empty_zero_page. * sh: used empty_zero_page for boot parameters at the very early boot. Rename the parameters page to boot_params_page and let sh use the generic empty_zero_page. * hexagon: had an amusing comment about empty_zero_page /* A handy thing to have if one has the RAM. Declared in head.S */ that unfortunately had to go :) Link: https://lkml.kernel.org/r/20260211103141.3215197-4-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Acked-by: Helge Deller <deller@gmx.de> [parisc] Tested-by: Helge Deller <deller@gmx.de> [parisc] Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Magnus Lindholm <linmag7@gmail.com> [alpha] Acked-by: Dinh Nguyen <dinguyen@kernel.org> [nios2] Acked-by: Andreas Larsson <andreas@gaisler.com> [sparc] Acked-by: David Hildenbrand (Arm) <david@kernel.org> Acked-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: "Borislav Petkov (AMD)" <bp@alien8.de> Cc: David S. Miller <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Guo Ren <guoren@kernel.org> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@suse.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Richard Weinberger <richard@nod.at> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2008-2009 PetaLogix
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*/
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#include <linux/export.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/in6.h>
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#include <linux/syscalls.h>
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#include <asm/checksum.h>
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#include <asm/cacheflush.h>
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#include <linux/io.h>
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#include <asm/page.h>
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#include <linux/ftrace.h>
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#include <linux/uaccess.h>
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#include <asm/xilinx_mb_manager.h>
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#ifdef CONFIG_FUNCTION_TRACER
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extern void _mcount(void);
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EXPORT_SYMBOL(_mcount);
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#endif
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/*
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* Assembly functions that may be used (directly or indirectly) by modules
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*/
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EXPORT_SYMBOL(__copy_tofrom_user);
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#ifdef CONFIG_OPT_LIB_ASM
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EXPORT_SYMBOL(memcpy);
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EXPORT_SYMBOL(memmove);
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#endif
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EXPORT_SYMBOL(mbc);
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extern void __divsi3(void);
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EXPORT_SYMBOL(__divsi3);
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extern void __modsi3(void);
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EXPORT_SYMBOL(__modsi3);
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extern void __mulsi3(void);
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EXPORT_SYMBOL(__mulsi3);
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extern void __udivsi3(void);
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EXPORT_SYMBOL(__udivsi3);
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extern void __umodsi3(void);
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EXPORT_SYMBOL(__umodsi3);
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#ifdef CONFIG_MB_MANAGER
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extern void xmb_manager_register(uintptr_t phys_baseaddr, u32 cr_val,
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void (*callback)(void *data),
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void *priv, void (*reset_callback)(void *data));
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EXPORT_SYMBOL(xmb_manager_register);
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extern asmlinkage void xmb_inject_err(void);
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EXPORT_SYMBOL(xmb_inject_err);
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#endif
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