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fe557319aa
Better describe what these functions do. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
19 lines
456 B
C
19 lines
456 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
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*/
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#include <linux/uaccess.h>
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#include <linux/kernel.h>
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#include <os.h>
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bool copy_from_kernel_nofault_allowed(const void *src, size_t size)
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{
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void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE);
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if ((unsigned long)src < PAGE_SIZE || size <= 0)
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return false;
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if (os_mincore(psrc, size + src - psrc) <= 0)
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return false;
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return true;
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}
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