forked from luck/tmp_suning_uos_patched
d597580d37
provide raw_copy_..._user() and select ARCH_HAS_RAW_COPY_USER to use those. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
27 lines
629 B
C
27 lines
629 B
C
#include <linux/uaccess.h>
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/* out-of-line parts */
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#ifndef INLINE_COPY_FROM_USER
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unsigned long _copy_from_user(void *to, const void __user *from, unsigned long n)
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{
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unsigned long res = n;
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if (likely(access_ok(VERIFY_READ, from, n)))
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res = raw_copy_from_user(to, from, n);
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if (unlikely(res))
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memset(to + (n - res), 0, res);
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return res;
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}
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EXPORT_SYMBOL(_copy_from_user);
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#endif
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#ifndef INLINE_COPY_TO_USER
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unsigned long _copy_to_user(void *to, const void __user *from, unsigned long n)
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{
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if (likely(access_ok(VERIFY_WRITE, to, n)))
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n = raw_copy_to_user(to, from, n);
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return n;
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}
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EXPORT_SYMBOL(_copy_to_user);
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#endif
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