x86: use the new generic strnlen_user() function

This throws away the old x86-specific functions in favor of the generic
optimized version.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 0 insertions, 89 deletions

diff --git a/arch/x86/lib/usercopy_32.c b/arch/x86/lib/usercopy_32.c
index 883b216c60b..1781b2f950e 100644
--- a/arch/x86/lib/usercopy_32.c
+++ b/arch/x86/lib/usercopy_32.c
@@ -95,47 +95,6 @@ __clear_user(void __user *to, unsigned long n)
 }
 EXPORT_SYMBOL(__clear_user);
 
-/**
- * strnlen_user: - Get the size of a string in user space.
- * @s: The string to measure.
- * @n: The maximum valid length
- *
- * 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 the string is too long, returns a value greater than @n.
- */
-long strnlen_user(const char __user *s, long n)
-{
-        unsigned long mask = -__addr_ok(s);
-        unsigned long res, tmp;
-
-        might_fault();
-
-        __asm__ __volatile__(
-                "       testl %0, %0\n"
-                "       jz 3f\n"
-                "       andl %0,%%ecx\n"
-                "0:     repne; scasb\n"
-                "       setne %%al\n"
-                "       subl %%ecx,%0\n"
-                "       addl %0,%%eax\n"
-                "1:\n"
-                ".section .fixup,\"ax\"\n"
-                "2:     xorl %%eax,%%eax\n"
-                "       jmp 1b\n"
-                "3:     movb $1,%%al\n"
-                "       jmp 1b\n"
-                ".previous\n"
-                _ASM_EXTABLE(0b,2b)
-                :"=&r" (n), "=&D" (s), "=&a" (res), "=&c" (tmp)
-                :"0" (n), "1" (s), "2" (0), "3" (mask)
-                :"cc");
-        return res & mask;
-}
-EXPORT_SYMBOL(strnlen_user);
-
 #ifdef CONFIG_X86_INTEL_USERCOPY
 static unsigned long
 __copy_user_intel(void __user *to, const void *from, unsigned long size)
diff --git a/arch/x86/lib/usercopy_64.c b/arch/x86/lib/usercopy_64.c
index 0d0326f388c..e5b130bc2d0 100644
--- a/arch/x86/lib/usercopy_64.c
+++ b/arch/x86/lib/usercopy_64.c
@@ -52,54 +52,6 @@ unsigned long clear_user(void __user *to, unsigned long n)
 }
 EXPORT_SYMBOL(clear_user);
 
-/*
- * Return the size of a string (including the ending 0)
- *
- * Return 0 on exception, a value greater than N if too long
- */
-
-long __strnlen_user(const char __user *s, long n)
-{
-        long res = 0;
-        char c;
-
-        while (1) {
-                if (res>n)
-                        return n+1;
-                if (__get_user(c, s))
-                        return 0;
-                if (!c)
-                        return res+1;
-                res++;
-                s++;
-        }
-}
-EXPORT_SYMBOL(__strnlen_user);
-
-long strnlen_user(const char __user *s, long n)
-{
-        if (!access_ok(VERIFY_READ, s, 1))
-                return 0;
-        return __strnlen_user(s, n);
-}
-EXPORT_SYMBOL(strnlen_user);
-
-long strlen_user(const char __user *s)
-{
-        long res = 0;
-        char c;
-
-        for (;;) {
-                if (get_user(c, s))
-                        return 0;
-                if (!c)
-                        return res+1;
-                res++;
-                s++;
-        }
-}
-EXPORT_SYMBOL(strlen_user);
-
 unsigned long copy_in_user(void __user *to, const void __user *from, unsigned len)
 {
         if (access_ok(VERIFY_WRITE, to, len) && access_ok(VERIFY_READ, from, len)) {