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sysctl: mips Use the compat_sys_sysctl

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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>
This commit is contained in:
Eric W. Biederman 2009-04-03 00:46:47 -07:00
parent 6f589526df
commit aff639cdcf
3 changed files with 2 additions and 63 deletions
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61
arch/mips/kernel/linux32.c
View File

@ -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;

2
arch/mips/kernel/scall64-n32.S
View File

@ -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 */

2
arch/mips/kernel/scall64-o32.S
View File

@ -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