mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-04 08:33:27 +01:00
Kefeng Wang
2be9880dc8
Only x86 has own release_thread(), introduce a new weak release_thread() function to clean empty definitions in other ARCHs. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Kefeng Wang <[email protected]> Acked-by: Guo Ren <[email protected]> [csky] Acked-by: Russell King (Oracle) <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Acked-by: Brian Cain <[email protected]> Acked-by: Michael Ellerman <[email protected]> [powerpc] Acked-by: Stafford Horne <[email protected]> [openrisc] Acked-by: Catalin Marinas <[email protected]> [arm64] Acked-by: Huacai Chen <[email protected]> [LoongArch] Cc: Alexander Gordeev <[email protected]> Cc: Anton Ivanov <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Christian Borntraeger <[email protected]> Cc: Christophe Leroy <[email protected]> Cc: Chris Zankel <[email protected]> Cc: Dave Hansen <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Dinh Nguyen <[email protected]> Cc: Guo Ren <[email protected]> [csky] Cc: Heiko Carstens <[email protected]> Cc: Helge Deller <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Ivan Kokshaysky <[email protected]> Cc: James Bottomley <[email protected]> Cc: Johannes Berg <[email protected]> Cc: Jonas Bonn <[email protected]> Cc: Matt Turner <[email protected]> Cc: Max Filippov <[email protected]> Cc: Michal Simek <[email protected]> Cc: Nicholas Piggin <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Rich Felker <[email protected]> Cc: Stefan Kristiansson <[email protected]> Cc: Sven Schnelle <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: Will Deacon <[email protected]> Cc: Xuerui Wang <[email protected]> Cc: Yoshinori Sato <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
135 lines
3.0 KiB
C
135 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* arch/arm/include/asm/processor.h
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*
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* Copyright (C) 1995-1999 Russell King
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*/
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#ifndef __ASM_ARM_PROCESSOR_H
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#define __ASM_ARM_PROCESSOR_H
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#ifdef __KERNEL__
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#include <asm/hw_breakpoint.h>
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#include <asm/ptrace.h>
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#include <asm/types.h>
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#include <asm/unified.h>
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#include <asm/vdso/processor.h>
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#ifdef __KERNEL__
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#define STACK_TOP ((current->personality & ADDR_LIMIT_32BIT) ? \
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TASK_SIZE : TASK_SIZE_26)
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#define STACK_TOP_MAX TASK_SIZE
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#endif
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struct debug_info {
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#ifdef CONFIG_HAVE_HW_BREAKPOINT
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struct perf_event *hbp[ARM_MAX_HBP_SLOTS];
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#endif
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};
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struct thread_struct {
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/* fault info */
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unsigned long address;
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unsigned long trap_no;
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unsigned long error_code;
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/* debugging */
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struct debug_info debug;
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};
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/*
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* Everything usercopied to/from thread_struct is statically-sized, so
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* no hardened usercopy whitelist is needed.
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*/
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static inline void arch_thread_struct_whitelist(unsigned long *offset,
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unsigned long *size)
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{
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*offset = *size = 0;
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}
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#define INIT_THREAD { }
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#define start_thread(regs,pc,sp) \
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({ \
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unsigned long r7, r8, r9; \
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\
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if (IS_ENABLED(CONFIG_BINFMT_ELF_FDPIC)) { \
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r7 = regs->ARM_r7; \
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r8 = regs->ARM_r8; \
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r9 = regs->ARM_r9; \
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} \
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memset(regs->uregs, 0, sizeof(regs->uregs)); \
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if (IS_ENABLED(CONFIG_BINFMT_ELF_FDPIC) && \
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current->personality & FDPIC_FUNCPTRS) { \
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regs->ARM_r7 = r7; \
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regs->ARM_r8 = r8; \
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regs->ARM_r9 = r9; \
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regs->ARM_r10 = current->mm->start_data; \
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} else if (!IS_ENABLED(CONFIG_MMU)) \
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regs->ARM_r10 = current->mm->start_data; \
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if (current->personality & ADDR_LIMIT_32BIT) \
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regs->ARM_cpsr = USR_MODE; \
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else \
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regs->ARM_cpsr = USR26_MODE; \
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if (elf_hwcap & HWCAP_THUMB && pc & 1) \
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regs->ARM_cpsr |= PSR_T_BIT; \
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regs->ARM_cpsr |= PSR_ENDSTATE; \
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regs->ARM_pc = pc & ~1; /* pc */ \
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regs->ARM_sp = sp; /* sp */ \
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})
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/* Forward declaration, a strange C thing */
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struct task_struct;
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unsigned long __get_wchan(struct task_struct *p);
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#define task_pt_regs(p) \
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((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)
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#define KSTK_EIP(tsk) task_pt_regs(tsk)->ARM_pc
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#define KSTK_ESP(tsk) task_pt_regs(tsk)->ARM_sp
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#ifdef CONFIG_SMP
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#define __ALT_SMP_ASM(smp, up) \
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"9998: " smp "\n" \
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" .pushsection \".alt.smp.init\", \"a\"\n" \
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" .align 2\n" \
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" .long 9998b - .\n" \
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" " up "\n" \
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" .popsection\n"
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#else
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#define __ALT_SMP_ASM(smp, up) up
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#endif
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/*
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* Prefetching support - only ARMv5.
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*/
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#if __LINUX_ARM_ARCH__ >= 5
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#define ARCH_HAS_PREFETCH
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static inline void prefetch(const void *ptr)
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{
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__asm__ __volatile__(
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"pld\t%a0"
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:: "p" (ptr));
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}
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#if __LINUX_ARM_ARCH__ >= 7 && defined(CONFIG_SMP)
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#define ARCH_HAS_PREFETCHW
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static inline void prefetchw(const void *ptr)
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{
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__asm__ __volatile__(
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".arch_extension mp\n"
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__ALT_SMP_ASM(
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"pldw\t%a0",
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"pld\t%a0"
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)
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:: "p" (ptr));
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}
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#endif
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#endif
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#endif
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#endif /* __ASM_ARM_PROCESSOR_H */
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