mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 00:17:44 +00:00
42fda66387
This patchset throws out tt mode, which has been non-functional for a while. This is done in phases, interspersed with code cleanups on the affected files. The removal is done as follows: remove all code, config options, and files which depend on CONFIG_MODE_TT get rid of the CHOOSE_MODE macro, which decided whether to call tt-mode or skas-mode code, and replace invocations with their skas portions replace all now-trivial procedures with their skas equivalents There are now a bunch of now-redundant pieces of data structures, including mode-specific pieces of the thread structure, pt_regs, and mm_context. These are all replaced with their skas-specific contents. As part of the ongoing style compliance project, I made a style pass over all files that were changed. There are three such patches, one for each phase, covering the files affected by that phase but no later ones. I noticed that we weren't freeing the LDT state associated with a process when it exited, so that's fixed in one of the later patches. The last patch is a tidying patch which I've had for a while, but which caused inexplicable crashes under tt mode. Since that is no longer a problem, this can now go in. This patch: Start getting rid of tt mode support. This patch throws out CONFIG_MODE_TT and all config options, code, and files which depend on it. CONFIG_MODE_SKAS is gone and everything that depends on it is included unconditionally. The few changed lines are in re-written Kconfig help, lines which needed something skas-related removed from them, and a few more which weren't strictly deletions. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
/*
|
|
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
#include <sys/time.h>
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
#include "kern_util.h"
|
|
#include "user.h"
|
|
#include "process.h"
|
|
#include "kern_constants.h"
|
|
#include "os.h"
|
|
#include "uml-config.h"
|
|
|
|
int set_interval(int is_virtual)
|
|
{
|
|
int usec = 1000000/hz();
|
|
int timer_type = is_virtual ? ITIMER_VIRTUAL : ITIMER_REAL;
|
|
struct itimerval interval = ((struct itimerval) { { 0, usec },
|
|
{ 0, usec } });
|
|
|
|
if(setitimer(timer_type, &interval, NULL) == -1)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void disable_timer(void)
|
|
{
|
|
struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
|
|
if((setitimer(ITIMER_VIRTUAL, &disable, NULL) < 0) ||
|
|
(setitimer(ITIMER_REAL, &disable, NULL) < 0))
|
|
printk("disnable_timer - setitimer failed, errno = %d\n",
|
|
errno);
|
|
/* If there are signals already queued, after unblocking ignore them */
|
|
signal(SIGALRM, SIG_IGN);
|
|
signal(SIGVTALRM, SIG_IGN);
|
|
}
|
|
|
|
void switch_timers(int to_real)
|
|
{
|
|
struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
|
|
struct itimerval enable = ((struct itimerval) { { 0, 1000000/hz() },
|
|
{ 0, 1000000/hz() }});
|
|
int old, new;
|
|
|
|
if(to_real){
|
|
old = ITIMER_VIRTUAL;
|
|
new = ITIMER_REAL;
|
|
}
|
|
else {
|
|
old = ITIMER_REAL;
|
|
new = ITIMER_VIRTUAL;
|
|
}
|
|
|
|
if((setitimer(old, &disable, NULL) < 0) ||
|
|
(setitimer(new, &enable, NULL)))
|
|
printk("switch_timers - setitimer failed, errno = %d\n",
|
|
errno);
|
|
}
|
|
|
|
unsigned long long os_nsecs(void)
|
|
{
|
|
struct timeval tv;
|
|
|
|
gettimeofday(&tv, NULL);
|
|
return((unsigned long long) tv.tv_sec * BILLION + tv.tv_usec * 1000);
|
|
}
|
|
|
|
void idle_sleep(int secs)
|
|
{
|
|
struct timespec ts;
|
|
|
|
ts.tv_sec = secs;
|
|
ts.tv_nsec = 0;
|
|
nanosleep(&ts, NULL);
|
|
}
|