sysctl: mips Use the compat_sys_sysctl

Now that we have a generic 32bit compatibility implementation
there is no need for mips to implement it's own.

Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

3 files changed, 2 insertions, 63 deletions

diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index b77fefaff9da..1a2793efdc4e 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -265,67 +265,6 @@ SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz,
 }
 #endif
 
-struct sysctl_args32
-{
-        compat_caddr_t name;
-        int nlen;
-        compat_caddr_t oldval;
-        compat_caddr_t oldlenp;
-        compat_caddr_t newval;
-        compat_size_t newlen;
-        unsigned int __unused[4];
-};
-
-#ifdef CONFIG_SYSCTL_SYSCALL
-
-SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args)
-{
-        struct sysctl_args32 tmp;
-        int error;
-        size_t oldlen;
-        size_t __user *oldlenp = NULL;
-        unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
-
-        if (copy_from_user(&tmp, args, sizeof(tmp)))
-                return -EFAULT;
-
-        if (tmp.oldval && tmp.oldlenp) {
-                /* Duh, this is ugly and might not work if sysctl_args
-                   is in read-only memory, but do_sysctl does indirectly
-                   a lot of uaccess in both directions and we'd have to
-                   basically copy the whole sysctl.c here, and
-                   glibc's __sysctl uses rw memory for the structure
-                   anyway.  */
-                if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) ||
-                    put_user(oldlen, (size_t __user *)addr))
-                        return -EFAULT;
-                oldlenp = (size_t __user *)addr;
-        }
-
-        lock_kernel();
-        error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
-                          oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
-        unlock_kernel();
-        if (oldlenp) {
-                if (!error) {
-                        if (get_user(oldlen, (size_t __user *)addr) ||
-                            put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
-                                error = -EFAULT;
-                }
-                copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
-        }
-        return error;
-}
-
-#else
-
-SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args)
-{
-        return -ENOSYS;
-}
-
-#endif /* CONFIG_SYSCTL_SYSCALL */
-
 SYSCALL_DEFINE1(32_newuname, struct new_utsname __user *, name)
 {
         int ret = 0;
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 6ebc07976694..8a0be0bdebad 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -272,7 +272,7 @@ EXPORT(sysn32_call_table)
         PTR     sys_munlockall
         PTR     sys_vhangup                     /* 6150 */
         PTR     sys_pivot_root
-        PTR     sys_32_sysctl
+        PTR     compat_sys_sysctl
         PTR     sys_prctl
         PTR     compat_sys_adjtimex
         PTR     compat_sys_setrlimit            /* 6155 */
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 14dde4ca932e..41dbdb7d67e5 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -356,7 +356,7 @@ sys_call_table:
         PTR     sys_ni_syscall                  /* 4150 */
         PTR     sys_getsid
         PTR     sys_fdatasync
-        PTR     sys_32_sysctl
+        PTR     compat_sys_sysctl
         PTR     sys_mlock
         PTR     sys_munlock                     /* 4155 */
         PTR     sys_mlockall