https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: e8f897f4afef0031fe618a8e94127a0934896aba authored by Linus Torvalds on 10 March 2024, 20:38:09 UTC
Linux 6.8
Linux 6.8
Tip revision: e8f897f
uaccess_flushcache.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2017 ARM Ltd.
*/
#include <linux/uaccess.h>
#include <asm/barrier.h>
#include <asm/cacheflush.h>
void memcpy_flushcache(void *dst, const void *src, size_t cnt)
{
/*
* We assume this should not be called with @dst pointing to
* non-cacheable memory, such that we don't need an explicit
* barrier to order the cache maintenance against the memcpy.
*/
memcpy(dst, src, cnt);
dcache_clean_pop((unsigned long)dst, (unsigned long)dst + cnt);
}
EXPORT_SYMBOL_GPL(memcpy_flushcache);
unsigned long __copy_user_flushcache(void *to, const void __user *from,
unsigned long n)
{
unsigned long rc;
rc = raw_copy_from_user(to, from, n);
/* See above */
dcache_clean_pop((unsigned long)to, (unsigned long)to + n - rc);
return rc;
}