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author | Al Viro <viro@zeniv.linux.org.uk> | 2017-03-21 19:27:36 +0100 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-03-29 00:24:02 +0200 |
commit | 23504bae7f3edd1484c4d470362f2b12bcd298f9 (patch) | |
tree | ae7aaa8ee94fd9f195ef2a741f2f64e48ea75a95 /arch/tile/include | |
parent | tile: switch to generic extable.h (diff) | |
download | linux-23504bae7f3edd1484c4d470362f2b12bcd298f9.tar.xz linux-23504bae7f3edd1484c4d470362f2b12bcd298f9.zip |
tile: get rid of zeroing, switch to RAW_COPY_USER
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/tile/include')
-rw-r--r-- | arch/tile/include/asm/uaccess.h | 143 |
1 files changed, 7 insertions, 136 deletions
diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h index ef3a1fd07946..a803f6bb4d92 100644 --- a/arch/tile/include/asm/uaccess.h +++ b/arch/tile/include/asm/uaccess.h @@ -313,145 +313,16 @@ extern int __put_user_bad(void) ((x) = 0, -EFAULT); \ }) -/** - * __copy_to_user() - copy data into user space, with less checking. - * @to: Destination address, in user space. - * @from: Source address, in kernel space. - * @n: Number of bytes to copy. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * Copy data from kernel space to user space. Caller must check - * the specified block with access_ok() before calling this function. - * - * Returns number of bytes that could not be copied. - * On success, this will be zero. - * - * An alternate version - __copy_to_user_inatomic() - is designed - * to be called from atomic context, typically bracketed by calls - * to pagefault_disable() and pagefault_enable(). - */ -extern unsigned long __must_check __copy_to_user_inatomic( - void __user *to, const void *from, unsigned long n); - -static inline unsigned long __must_check -__copy_to_user(void __user *to, const void *from, unsigned long n) -{ - might_fault(); - return __copy_to_user_inatomic(to, from, n); -} - -static inline unsigned long __must_check -copy_to_user(void __user *to, const void *from, unsigned long n) -{ - if (access_ok(VERIFY_WRITE, to, n)) - n = __copy_to_user(to, from, n); - return n; -} - -/** - * __copy_from_user() - copy data from user space, with less checking. - * @to: Destination address, in kernel space. - * @from: Source address, in user space. - * @n: Number of bytes to copy. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * Copy data from user space to kernel space. Caller must check - * the specified block with access_ok() before calling this function. - * - * Returns number of bytes that could not be copied. - * On success, this will be zero. - * - * If some data could not be copied, this function will pad the copied - * data to the requested size using zero bytes. - * - * An alternate version - __copy_from_user_inatomic() - is designed - * to be called from atomic context, typically bracketed by calls - * to pagefault_disable() and pagefault_enable(). This version - * does *NOT* pad with zeros. - */ -extern unsigned long __must_check __copy_from_user_inatomic( - void *to, const void __user *from, unsigned long n); -extern unsigned long __must_check __copy_from_user_zeroing( - void *to, const void __user *from, unsigned long n); - -static inline unsigned long __must_check -__copy_from_user(void *to, const void __user *from, unsigned long n) -{ - might_fault(); - return __copy_from_user_zeroing(to, from, n); -} - -static inline unsigned long __must_check -_copy_from_user(void *to, const void __user *from, unsigned long n) -{ - if (access_ok(VERIFY_READ, from, n)) - n = __copy_from_user(to, from, n); - else - memset(to, 0, n); - return n; -} - -extern void __compiletime_error("usercopy buffer size is too small") -__bad_copy_user(void); - -static inline void copy_user_overflow(int size, unsigned long count) -{ - WARN(1, "Buffer overflow detected (%d < %lu)!\n", size, count); -} - -static inline unsigned long __must_check copy_from_user(void *to, - const void __user *from, - unsigned long n) -{ - int sz = __compiletime_object_size(to); - - if (likely(sz == -1 || sz >= n)) - n = _copy_from_user(to, from, n); - else if (!__builtin_constant_p(n)) - copy_user_overflow(sz, n); - else - __bad_copy_user(); - - return n; -} +extern unsigned long __must_check +raw_copy_to_user(void __user *to, const void *from, unsigned long n); +extern unsigned long __must_check +raw_copy_from_user(void *to, const void __user *from, unsigned long n); +#define INLINE_COPY_FROM_USER +#define INLINE_COPY_TO_USER #ifdef __tilegx__ -/** - * __copy_in_user() - copy data within user space, with less checking. - * @to: Destination address, in user space. - * @from: Source address, in user space. - * @n: Number of bytes to copy. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * Copy data from user space to user space. Caller must check - * the specified blocks with access_ok() before calling this function. - * - * Returns number of bytes that could not be copied. - * On success, this will be zero. - */ -extern unsigned long __copy_in_user_inatomic( +extern unsigned long raw_copy_in_user( void __user *to, const void __user *from, unsigned long n); - -static inline unsigned long __must_check -__copy_in_user(void __user *to, const void __user *from, unsigned long n) -{ - might_fault(); - return __copy_in_user_inatomic(to, from, n); -} - -static inline unsigned long __must_check -copy_in_user(void __user *to, const void __user *from, unsigned long n) -{ - if (access_ok(VERIFY_WRITE, to, n) && access_ok(VERIFY_READ, from, n)) - n = __copy_in_user(to, from, n); - return n; -} #endif |