uml: rename os_{read_write}_file_k back to os_{read_write}_file

Rename os_{read_write}_file_k back to os_{read_write}_file, delete
the originals and their bogus infrastructure, and fix all the callers.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/kernel/smp.c b/arch/um/kernel/smp.c
index 9ac5621..e6a7778 100644
--- a/arch/um/kernel/smp.c
+++ b/arch/um/kernel/smp.c
@@ -47,7 +47,7 @@
 
 void smp_send_reschedule(int cpu)
 {
-	os_write_file_k(cpu_data[cpu].ipi_pipe[1], "R", 1);
+	os_write_file(cpu_data[cpu].ipi_pipe[1], "R", 1);
 	num_reschedules_sent++;
 }
 
@@ -59,7 +59,7 @@
 	for(i = 0; i < num_online_cpus(); i++){
 		if(i == current_thread->cpu)
 			continue;
-		os_write_file_k(cpu_data[i].ipi_pipe[1], "S", 1);
+		os_write_file(cpu_data[i].ipi_pipe[1], "S", 1);
 	}
 	printk("done\n");
 }
@@ -108,8 +108,8 @@
 		          { .pid = 	new_task->thread.mode.tt.extern_pid,
 			    .task = 	new_task } );
 	idle_threads[cpu] = new_task;
-	CHOOSE_MODE(os_write_file_k(new_task->thread.mode.tt.switch_pipe[1], &c,
-				    sizeof(c)),
+	CHOOSE_MODE(os_write_file(new_task->thread.mode.tt.switch_pipe[1], &c,
+				  sizeof(c)),
 		    ({ panic("skas mode doesn't support SMP"); }));
 	return new_task;
 }
@@ -179,7 +179,7 @@
 	int fd;
 
 	fd = cpu_data[cpu].ipi_pipe[0];
-	while (os_read_file_k(fd, &c, 1) == 1) {
+	while (os_read_file(fd, &c, 1) == 1) {
 		switch (c) {
 		case 'C':
 			smp_call_function_slave(cpu);
@@ -239,7 +239,7 @@
 	info = _info;
 
 	for_each_online_cpu(i)
-		os_write_file_k(cpu_data[i].ipi_pipe[1], "C", 1);
+		os_write_file(cpu_data[i].ipi_pipe[1], "C", 1);
 
 	while (atomic_read(&scf_started) != cpus)
 		barrier();