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kill strlen_user()

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no callers, no consistent semantics, no sane way to use it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-04-07 17:20:01 -04:00
parent 2ea659a9ef
commit 8298525839
32 changed files with 2 additions and 465 deletions
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44
arch/mips/include/asm/uaccess.h
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@ -1073,50 +1073,6 @@ strncpy_from_user(char *__to, const char __user *__from, long __len)
return res;
}
extern long __strlen_kernel_asm(const char __user *s);
extern long __strlen_user_asm(const char __user *s);
/*
* strlen_user: - Get the size of a string in user space.
* @str: The string to measure.
*
* Context: User context only. This function may sleep if pagefaults are
* enabled.
*
* Get the size of a NUL-terminated string in user space.
*
* Returns the size of the string INCLUDING the terminating NUL.
* On exception, returns 0.
*
* If there is a limit on the length of a valid string, you may wish to
* consider using strnlen_user() instead.
*/
static inline long strlen_user(const char __user *s)
{
long res;
if (eva_kernel_access()) {
__asm__ __volatile__(
"move\t$4, %1\n\t"
__MODULE_JAL(__strlen_kernel_asm)
"move\t%0, $2"
: "=r" (res)
: "r" (s)
: "$2", "$4", __UA_t0, "$31");
} else {
might_fault();
__asm__ __volatile__(
"move\t$4, %1\n\t"
__MODULE_JAL(__strlen_user_asm)
"move\t%0, $2"
: "=r" (res)
: "r" (s)
: "$2", "$4", __UA_t0, "$31");
}
return res;
}
extern long __strnlen_kernel_nocheck_asm(const char __user *s, long n);
extern long __strnlen_user_nocheck_asm(const char __user *s, long n);