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f7d304343b
Add a line in /proc/$PID/status to report untag_mask. It can be used to find out LAM status of the process from the outside. It is useful for debuggers. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Alexander Potapenko <glider@google.com> Link: https://lore.kernel.org/all/20230312112612.31869-10-kirill.shutemov%40linux.intel.com
38 lines
967 B
C
38 lines
967 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_MMU_CONTEXT_H
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#define _LINUX_MMU_CONTEXT_H
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#include <asm/mmu_context.h>
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#include <asm/mmu.h>
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/* Architectures that care about IRQ state in switch_mm can override this. */
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#ifndef switch_mm_irqs_off
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# define switch_mm_irqs_off switch_mm
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#endif
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#ifndef leave_mm
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static inline void leave_mm(int cpu) { }
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#endif
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/*
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* CPUs that are capable of running user task @p. Must contain at least one
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* active CPU. It is assumed that the kernel can run on all CPUs, so calling
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* this for a kernel thread is pointless.
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*
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* By default, we assume a sane, homogeneous system.
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*/
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#ifndef task_cpu_possible_mask
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# define task_cpu_possible_mask(p) cpu_possible_mask
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# define task_cpu_possible(cpu, p) true
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#else
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# define task_cpu_possible(cpu, p) cpumask_test_cpu((cpu), task_cpu_possible_mask(p))
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#endif
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#ifndef mm_untag_mask
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static inline unsigned long mm_untag_mask(struct mm_struct *mm)
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{
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return -1UL;
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}
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#endif
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#endif
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