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Commit aff639cd authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

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: default avatarEric W. Biederman <ebiederm@xmission.com>
parent 6f589526

arch/mips/kernel/linux32.c

+0 −61
Original line number Diff line number Diff line
@@ -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;

arch/mips/kernel/scall64-n32.S

+1 −1
Original line number Diff line number Diff line
@@ -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 */

arch/mips/kernel/scall64-o32.S

+1 −1
Original line number Diff line number Diff line
@@ -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