[MIPS] Fix AP/SP to work in the reality of modern kernels.

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/kernel/kspd.c

@@ -17,6 +17,7 @@
  */
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/sched.h>
 #include <linux/unistd.h>
 #include <linux/file.h>
 #include <linux/fs.h>
@@ -198,7 +199,6 @@ void sp_work_handle_request(void)
 	int cmd;
 
 	char *vcwd;
-	mm_segment_t old_fs;
 	int size;
 
 	ret.retval = -1;
@@ -241,8 +241,6 @@ void sp_work_handle_request(void)
  		if ((ret.retval = sp_syscall(__NR_gettimeofday, (int)&tv,
  		                             (int)&tz, 0,0)) == 0)
 		ret.retval = tv.tv_sec;
-
-		ret.errno = errno;
 		break;
 
  	case MTSP_SYSCALL_EXIT:
@@ -279,7 +277,6 @@ void sp_work_handle_request(void)
 		if (cmd >= 0) {
 			ret.retval = sp_syscall(cmd, generic.arg0, generic.arg1,
 			                        generic.arg2, generic.arg3);
-			ret.errno = errno;
 		} else
  			printk(KERN_WARNING
 			       "KSPD: Unknown SP syscall number %d\n", sc.cmd);

arch/mips/kernel/rtlx.c

@@ -289,7 +289,7 @@ unsigned int rtlx_write_poll(int index)
 	return write_spacefree(chan->rt_read, chan->rt_write, chan->buffer_size);
 }
 
-ssize_t rtlx_read(int index, void __user *buff, size_t count, int user)
+ssize_t rtlx_read(int index, void __user *buff, size_t count)
 {
 	size_t lx_write, fl = 0L;
 	struct rtlx_channel *lx;
@@ -331,9 +331,10 @@ ssize_t rtlx_read(int index, void __user *buff, size_t count, int user)
 	return count;
 }
 
-ssize_t rtlx_write(int index, const void __user *buffer, size_t count, int user)
+ssize_t rtlx_write(int index, const void __user *buffer, size_t count)
 {
 	struct rtlx_channel *rt;
+	unsigned long failed;
 	size_t rt_read;
 	size_t fl;
 
@@ -363,7 +364,7 @@ ssize_t rtlx_write(int index, const void __user *buffer, size_t count, int user)
 	}
 
 out:
-	count -= cailed;
+	count -= failed;
 
 	smp_wmb();
 	rt->rt_write = (rt->rt_write + count) % rt->buffer_size;