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provide raw_copy_..._user() and select ARCH_HAS_RAW_COPY_USER to use those. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Al Viro
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Mar 28, 2017
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Original file line number | Diff line number | Diff line change |
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#include <linux/uaccess.h> | ||
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/* out-of-line parts */ | ||
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#ifndef INLINE_COPY_FROM_USER | ||
unsigned long _copy_from_user(void *to, const void __user *from, unsigned long n) | ||
{ | ||
unsigned long res = n; | ||
if (likely(access_ok(VERIFY_READ, from, n))) | ||
res = raw_copy_from_user(to, from, n); | ||
if (unlikely(res)) | ||
memset(to + (n - res), 0, res); | ||
return res; | ||
} | ||
EXPORT_SYMBOL(_copy_from_user); | ||
#endif | ||
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#ifndef INLINE_COPY_TO_USER | ||
unsigned long _copy_to_user(void *to, const void __user *from, unsigned long n) | ||
{ | ||
if (likely(access_ok(VERIFY_WRITE, to, n))) | ||
n = raw_copy_to_user(to, from, n); | ||
return n; | ||
} | ||
EXPORT_SYMBOL(_copy_to_user); | ||
#endif |