Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
40 lines
813 B
C
40 lines
813 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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*
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* Copyright (C) IBM Corporation, 2010
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*
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* Author: Anton Blanchard <anton@au.ibm.com>
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*/
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#include <linux/export.h>
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <asm/checksum.h>
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#include <linux/uaccess.h>
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__wsum csum_and_copy_from_user(const void __user *src, void *dst,
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int len)
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{
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__wsum csum;
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if (unlikely(!user_read_access_begin(src, len)))
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return 0;
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csum = csum_partial_copy_generic((void __force *)src, dst, len);
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user_read_access_end();
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return csum;
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}
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__wsum csum_and_copy_to_user(const void *src, void __user *dst, int len)
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{
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__wsum csum;
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if (unlikely(!user_write_access_begin(dst, len)))
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return 0;
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csum = csum_partial_copy_generic(src, (void __force *)dst, len);
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user_write_access_end();
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return csum;
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}
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