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af0a76e126
There are a few __weak functions in kernel/fork.c, which architectures can override. If there is no prototype, the compiler warns about them: kernel/fork.c:164:13: error: no previous prototype for 'arch_release_task_struct' [-Werror=missing-prototypes] kernel/fork.c:991:20: error: no previous prototype for 'arch_task_cache_init' [-Werror=missing-prototypes] kernel/fork.c:1086:12: error: no previous prototype for 'arch_dup_task_struct' [-Werror=missing-prototypes] There are already prototypes in a number of architecture specific headers that have addressed those warnings before, but it's much better to have these in a single place so the warning no longer shows up anywhere. Link: https://lkml.kernel.org/r/20230517131102.934196-14-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christoph Lameter <cl@linux.com> Cc: Dennis Zhou <dennis@kernel.org> Cc: Eric Paris <eparis@redhat.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Moore <paul@paul-moore.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rafael@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Waiman Long <longman@redhat.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
107 lines
3.4 KiB
C
107 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* S390 version
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* Copyright IBM Corp. 2002, 2006
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* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
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*/
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#ifndef _ASM_THREAD_INFO_H
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#define _ASM_THREAD_INFO_H
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#include <linux/bits.h>
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#ifndef ASM_OFFSETS_C
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#include <asm/asm-offsets.h>
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#endif
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/*
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* General size of kernel stacks
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*/
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#ifdef CONFIG_KASAN
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#define THREAD_SIZE_ORDER 4
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#else
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#define THREAD_SIZE_ORDER 2
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#endif
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#define BOOT_STACK_SIZE (PAGE_SIZE << 2)
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#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
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#define STACK_INIT_OFFSET (THREAD_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE)
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#ifndef __ASSEMBLY__
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#include <asm/lowcore.h>
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#include <asm/page.h>
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/*
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* low level task data that entry.S needs immediate access to
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* - this struct should fit entirely inside of one cache line
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* - this struct shares the supervisor stack pages
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* - if the contents of this structure are changed, the assembly constants must also be changed
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*/
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struct thread_info {
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unsigned long flags; /* low level flags */
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unsigned long syscall_work; /* SYSCALL_WORK_ flags */
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unsigned int cpu; /* current CPU */
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};
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/*
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* macros/functions for gaining access to the thread information structure
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*/
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.flags = 0, \
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}
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struct task_struct;
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void arch_setup_new_exec(void);
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#define arch_setup_new_exec arch_setup_new_exec
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#endif
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/*
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* thread information flags bit numbers
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*/
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/* _TIF_WORK bits */
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#define TIF_NOTIFY_RESUME 0 /* callback before returning to user */
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#define TIF_SIGPENDING 1 /* signal pending */
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#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
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#define TIF_UPROBE 3 /* breakpointed or single-stepping */
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#define TIF_GUARDED_STORAGE 4 /* load guarded storage control block */
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#define TIF_PATCH_PENDING 5 /* pending live patching update */
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#define TIF_PGSTE 6 /* New mm's will use 4K page tables */
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#define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */
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#define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */
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#define TIF_PER_TRAP 10 /* Need to handle PER trap on exit to usermode */
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#define TIF_31BIT 16 /* 32bit process */
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#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
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#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */
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#define TIF_SINGLE_STEP 19 /* This task is single stepped */
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#define TIF_BLOCK_STEP 20 /* This task is block stepped */
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#define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */
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/* _TIF_TRACE bits */
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#define TIF_SYSCALL_TRACE 24 /* syscall trace active */
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#define TIF_SYSCALL_AUDIT 25 /* syscall auditing active */
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#define TIF_SECCOMP 26 /* secure computing */
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#define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */
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#define _TIF_NOTIFY_RESUME BIT(TIF_NOTIFY_RESUME)
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#define _TIF_NOTIFY_SIGNAL BIT(TIF_NOTIFY_SIGNAL)
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#define _TIF_SIGPENDING BIT(TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED BIT(TIF_NEED_RESCHED)
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#define _TIF_UPROBE BIT(TIF_UPROBE)
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#define _TIF_GUARDED_STORAGE BIT(TIF_GUARDED_STORAGE)
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#define _TIF_PATCH_PENDING BIT(TIF_PATCH_PENDING)
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#define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST)
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#define _TIF_PER_TRAP BIT(TIF_PER_TRAP)
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#define _TIF_31BIT BIT(TIF_31BIT)
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#define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP)
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#define _TIF_SYSCALL_TRACE BIT(TIF_SYSCALL_TRACE)
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#define _TIF_SYSCALL_AUDIT BIT(TIF_SYSCALL_AUDIT)
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#define _TIF_SECCOMP BIT(TIF_SECCOMP)
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#define _TIF_SYSCALL_TRACEPOINT BIT(TIF_SYSCALL_TRACEPOINT)
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#endif /* _ASM_THREAD_INFO_H */
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