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>
33 lines
809 B
C
33 lines
809 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2017 ARM Ltd.
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*/
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#include <linux/uaccess.h>
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#include <asm/barrier.h>
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#include <asm/cacheflush.h>
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void memcpy_flushcache(void *dst, const void *src, size_t cnt)
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{
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/*
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* We assume this should not be called with @dst pointing to
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* non-cacheable memory, such that we don't need an explicit
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* barrier to order the cache maintenance against the memcpy.
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*/
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memcpy(dst, src, cnt);
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dcache_clean_pop((unsigned long)dst, (unsigned long)dst + cnt);
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}
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EXPORT_SYMBOL_GPL(memcpy_flushcache);
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unsigned long __copy_user_flushcache(void *to, const void __user *from,
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unsigned long n)
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{
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unsigned long rc;
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rc = raw_copy_from_user(to, from, n);
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/* See above */
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dcache_clean_pop((unsigned long)to, (unsigned long)to + n - rc);
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return rc;
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}
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