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x86/mm: Use mm_alloc() in poking_init()

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Instead of duplicating init_mm, allocate a fresh mm. The advantage is
that mm_alloc() has much simpler dependencies. Additionally it makes
more conceptual sense, init_mm has no (and must not have) user state
to duplicate.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221025201057.816175235@infradead.org
This commit is contained in:
Peter Zijlstra
2022-10-25 21:38:21 +02:00
committed by Dave Hansen
parent af80602799
commit 3f4c8211d9
3 changed files with 1 additions and 7 deletions
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5
kernel/fork.c
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@@ -2592,11 +2592,6 @@ struct task_struct * __init fork_idle(int cpu)
return task;
}
struct mm_struct *copy_init_mm(void)
{
return dup_mm(NULL, &init_mm);
}
/*
* This is like kernel_clone(), but shaved down and tailored to just
* creating io_uring workers. It returns a created task, or an error pointer.