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hexagon: switch to RAW_COPY_USER
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -26,6 +26,7 @@ config HEXAGON
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select GENERIC_CLOCKEVENTS_BROADCAST
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select MODULES_USE_ELF_RELA
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select GENERIC_CPU_DEVICES
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select ARCH_HAS_RAW_COPY_USER
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---help---
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Qualcomm Hexagon is a processor architecture designed for high
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performance and low power across a wide variety of applications.
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@ -65,19 +65,12 @@
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*/
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/* Assembly somewhat optimized copy routines */
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unsigned long __copy_from_user_hexagon(void *to, const void __user *from,
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unsigned long raw_copy_from_user(void *to, const void __user *from,
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unsigned long n);
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unsigned long __copy_to_user_hexagon(void __user *to, const void *from,
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unsigned long raw_copy_to_user(void __user *to, const void *from,
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unsigned long n);
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#define __copy_from_user(to, from, n) __copy_from_user_hexagon(to, from, n)
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#define __copy_to_user(to, from, n) __copy_to_user_hexagon(to, from, n)
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/*
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* XXX todo: some additonal performance gain is possible by
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* implementing __copy_to/from_user_inatomic, which is much
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* like __copy_to/from_user, but performs slightly less checking.
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*/
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#define INLINE_COPY_FROM_USER
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#define INLINE_COPY_TO_USER
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__kernel_size_t __clear_user_hexagon(void __user *dest, unsigned long count);
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#define __clear_user(a, s) __clear_user_hexagon((a), (s))
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@ -104,10 +97,14 @@ static inline long hexagon_strncpy_from_user(char *dst, const char __user *src,
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return -EFAULT;
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if (res > n) {
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copy_from_user(dst, src, n);
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long left = raw_copy_from_user(dst, src, n);
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if (unlikely(left))
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memset(dst + (n - left), 0, left);
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return n;
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} else {
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copy_from_user(dst, src, res);
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long left = raw_copy_from_user(dst, src, res);
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if (unlikely(left))
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memset(dst + (res - left), 0, left);
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return res-1;
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}
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}
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@ -25,8 +25,8 @@
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/* Additional functions */
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EXPORT_SYMBOL(__clear_user_hexagon);
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EXPORT_SYMBOL(__copy_from_user_hexagon);
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EXPORT_SYMBOL(__copy_to_user_hexagon);
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EXPORT_SYMBOL(raw_copy_from_user);
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EXPORT_SYMBOL(raw_copy_to_user);
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EXPORT_SYMBOL(__iounmap);
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EXPORT_SYMBOL(__strnlen_user);
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EXPORT_SYMBOL(__vmgetie);
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@ -44,7 +44,7 @@
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#define bytes r2
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#define loopcount r5
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#define FUNCNAME __copy_from_user_hexagon
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#define FUNCNAME raw_copy_from_user
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#include "copy_user_template.S"
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/* LOAD FAULTS from COPY_FROM_USER */
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@ -43,7 +43,7 @@
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#define bytes r2
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#define loopcount r5
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#define FUNCNAME __copy_to_user_hexagon
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#define FUNCNAME raw_copy_to_user
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#include "copy_user_template.S"
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/* STORE FAULTS from COPY_TO_USER */
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