Commit f6e34c6a authored by Jeff Dike's avatar Jeff Dike Committed by Linus Torvalds

[PATCH] uml: _switch_to code consolidation

This patch moves code that is in both switch_to_tt and switch_to_skas to the
top level _switch_to function, keeping us from duplicating code.  It is
required for the stack trace patch to work properly.
Signed-off-by: default avatarAllan Graves <allan.graves@gmail.com>
Signed-off-by: default avatarJeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 6add9f7f
......@@ -113,8 +113,16 @@ void set_current(void *t)
void *_switch_to(void *prev, void *next, void *last)
{
return(CHOOSE_MODE(switch_to_tt(prev, next),
switch_to_skas(prev, next)));
struct task_struct *from = prev;
struct task_struct *to= next;
to->thread.prev_sched = from;
set_current(to);
CHOOSE_MODE_PROC(switch_to_tt, switch_to_skas, prev, next);
return(current->thread.prev_sched);
}
void interrupt_end(void)
......
......@@ -11,7 +11,7 @@
#include "asm/ptrace.h"
extern void flush_thread_skas(void);
extern void *switch_to_skas(void *prev, void *next);
extern void switch_to_skas(void *prev, void *next);
extern void start_thread_skas(struct pt_regs *regs, unsigned long eip,
unsigned long esp);
extern int copy_thread_skas(int nr, unsigned long clone_flags,
......
......@@ -24,7 +24,7 @@
#include "proc_mm.h"
#include "registers.h"
void *switch_to_skas(void *prev, void *next)
void switch_to_skas(void *prev, void *next)
{
struct task_struct *from, *to;
......@@ -35,16 +35,11 @@ void *switch_to_skas(void *prev, void *next)
if(current->pid == 0)
switch_timers(0);
to->thread.prev_sched = from;
set_current(to);
switch_threads(&from->thread.mode.skas.switch_buf,
to->thread.mode.skas.switch_buf);
if(current->pid == 0)
switch_timers(1);
return(current->thread.prev_sched);
}
extern void schedule_tail(struct task_struct *prev);
......
......@@ -11,7 +11,7 @@
#include "asm/ptrace.h"
#include "asm/uaccess.h"
extern void *switch_to_tt(void *prev, void *next);
extern void switch_to_tt(void *prev, void *next);
extern void flush_thread_tt(void);
extern void start_thread_tt(struct pt_regs *regs, unsigned long eip,
unsigned long esp);
......
......@@ -26,7 +26,7 @@
#include "init.h"
#include "tt.h"
void *switch_to_tt(void *prev, void *next, void *last)
int switch_to_tt(void *prev, void *next, void *last)
{
struct task_struct *from, *to, *prev_sched;
unsigned long flags;
......@@ -36,8 +36,6 @@ void *switch_to_tt(void *prev, void *next, void *last)
from = prev;
to = next;
to->thread.prev_sched = from;
cpu = from->thread_info->cpu;
if(cpu == 0)
forward_interrupts(to->thread.mode.tt.extern_pid);
......@@ -53,7 +51,6 @@ void *switch_to_tt(void *prev, void *next, void *last)
forward_pending_sigio(to->thread.mode.tt.extern_pid);
c = 0;
set_current(to);
err = os_write_file(to->thread.mode.tt.switch_pipe[1], &c, sizeof(c));
if(err != sizeof(c))
......@@ -85,8 +82,6 @@ void *switch_to_tt(void *prev, void *next, void *last)
flush_tlb_all();
local_irq_restore(flags);
return(current->thread.prev_sched);
}
void release_thread_tt(struct task_struct *task)
......
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