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>
46 lines
933 B
C
46 lines
933 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef UACCESS_H
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#define UACCESS_H
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#include <linux/compiler.h>
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extern void *__user_addr_min, *__user_addr_max;
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#define put_user(x, ptr) \
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({ \
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typeof(ptr) __pu_ptr = (ptr); \
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__chk_user_ptr(__pu_ptr); \
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WRITE_ONCE(*(__pu_ptr), x); \
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0; \
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})
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#define get_user(x, ptr) \
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({ \
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typeof(ptr) __pu_ptr = (ptr); \
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__chk_user_ptr(__pu_ptr); \
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x = READ_ONCE(*(__pu_ptr)); \
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0; \
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})
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static void volatile_memcpy(volatile char *to, const volatile char *from,
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unsigned long n)
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{
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while (n--)
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*(to++) = *(from++);
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}
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static inline int copy_from_user(void *to, const void __user volatile *from,
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unsigned long n)
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{
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volatile_memcpy(to, from, n);
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return 0;
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}
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static inline int copy_to_user(void __user volatile *to, const void *from,
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unsigned long n)
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{
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volatile_memcpy(to, from, n);
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return 0;
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}
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#endif /* UACCESS_H */
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