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This patch introduces preparatory changes needed to support building PowerPC with the generic entry/exit (irqentry) framework. The following infrastructure updates are added: - Add a syscall_work field to struct thread_info to hold SYSCALL_WORK_* flags. - Provide a stub implementation of arch_syscall_is_vdso_sigreturn(), returning false for now. - Introduce on_thread_stack() helper to detect if the current stack pointer lies within the task’s kernel stack. These additions enable later integration with the generic entry/exit infrastructure while keeping existing PowerPC behavior unchanged. No functional change is intended in this patch. Signed-off-by: Mukesh Kumar Chaurasiya <mchauras@linux.ibm.com> Tested-by: Samir M <samir@linux.ibm.com> Tested-by: David Gow <davidgow@google.com> Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com> Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20260427122742.210074-3-mkchauras@gmail.com
20 lines
446 B
C
20 lines
446 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Stack trace functions.
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*
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* Copyright 2018, Murilo Opsfelder Araujo, IBM Corporation.
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*/
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#ifndef _ASM_POWERPC_STACKTRACE_H
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#define _ASM_POWERPC_STACKTRACE_H
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void show_user_instructions(struct pt_regs *regs);
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static __always_inline bool on_thread_stack(void)
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{
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return !(((unsigned long)(current->stack) ^ current_stack_pointer)
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& ~(THREAD_SIZE - 1));
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}
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#endif /* _ASM_POWERPC_STACKTRACE_H */
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