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https://gitee.com/bianbu-linux/linux-6.6
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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/20220819014406.32266-1-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Acked-by: Guo Ren <guoren@kernel.org> [csky] Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Brian Cain <bcain@quicinc.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Acked-by: Stafford Horne <shorne@gmail.com> [openrisc] Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Acked-by: Huacai Chen <chenhuacai@kernel.org> [LoongArch] Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Chris Zankel <chris@zankel.net> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Guo Ren <guoren@kernel.org> [csky] Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Jonas Bonn <jonas@southpole.se> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Xuerui Wang <kernel@xen0n.name> Cc: Yoshinori Sato <ysato@users.osdn.me> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_CSKY_PROCESSOR_H
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#define __ASM_CSKY_PROCESSOR_H
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#include <linux/bitops.h>
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#include <linux/cache.h>
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#include <asm/ptrace.h>
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#include <asm/current.h>
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#include <abi/reg_ops.h>
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#include <abi/regdef.h>
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#include <abi/switch_context.h>
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#ifdef CONFIG_CPU_HAS_FPU
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#include <abi/fpu.h>
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#endif
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struct cpuinfo_csky {
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unsigned long asid_cache;
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} __aligned(SMP_CACHE_BYTES);
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extern struct cpuinfo_csky cpu_data[];
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/*
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* User space process size: 2GB. This is hardcoded into a few places,
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* so don't change it unless you know what you are doing. TASK_SIZE
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* for a 64 bit kernel expandable to 8192EB, of which the current CSKY
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* implementations will "only" be able to use 1TB ...
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*/
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#define TASK_SIZE (PAGE_OFFSET - (PAGE_SIZE * 8))
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#ifdef __KERNEL__
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#define STACK_TOP TASK_SIZE
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#define STACK_TOP_MAX STACK_TOP
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#endif
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
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struct thread_struct {
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unsigned long sp; /* kernel stack pointer */
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unsigned long trap_no; /* saved status register */
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/* FPU regs */
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struct user_fp __aligned(16) user_fp;
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};
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#define INIT_THREAD { \
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.sp = sizeof(init_stack) + (unsigned long) &init_stack, \
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}
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/*
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* Do necessary setup to start up a newly executed thread.
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*
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* pass the data segment into user programs if it exists,
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* it can't hurt anything as far as I can tell
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*/
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#define start_thread(_regs, _pc, _usp) \
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do { \
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(_regs)->pc = (_pc); \
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(_regs)->regs[1] = 0; /* ABIV1 is R7, uClibc_main rtdl arg */ \
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(_regs)->regs[2] = 0; \
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(_regs)->regs[3] = 0; /* ABIV2 is R7, use it? */ \
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(_regs)->sr &= ~PS_S; \
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(_regs)->usp = (_usp); \
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} while (0)
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/* Forward declaration, a strange C thing */
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struct task_struct;
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/* Prepare to copy thread state - unlazy all lazy status */
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#define prepare_to_copy(tsk) do { } while (0)
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extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
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unsigned long __get_wchan(struct task_struct *p);
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#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
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#define KSTK_ESP(tsk) (task_pt_regs(tsk)->usp)
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#define task_pt_regs(p) \
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((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
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#define cpu_relax() barrier()
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#endif /* __ASM_CSKY_PROCESSOR_H */
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