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
/*
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* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include <sys/time.h>
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#include <signal.h>
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#include <errno.h>
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#include "kern_util.h"
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#include "user.h"
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#include "process.h"
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#include "kern_constants.h"
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#include "os.h"
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#include "uml-config.h"
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int set_interval(int is_virtual)
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{
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int usec = 1000000/hz();
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int timer_type = is_virtual ? ITIMER_VIRTUAL : ITIMER_REAL;
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struct itimerval interval = ((struct itimerval) { { 0, usec },
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{ 0, usec } });
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if(setitimer(timer_type, &interval, NULL) == -1)
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return -errno;
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return 0;
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}
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void disable_timer(void)
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{
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struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
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if((setitimer(ITIMER_VIRTUAL, &disable, NULL) < 0) ||
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(setitimer(ITIMER_REAL, &disable, NULL) < 0))
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printk("disnable_timer - setitimer failed, errno = %d\n",
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errno);
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/* If there are signals already queued, after unblocking ignore them */
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signal(SIGALRM, SIG_IGN);
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signal(SIGVTALRM, SIG_IGN);
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}
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void switch_timers(int to_real)
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{
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struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
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struct itimerval enable = ((struct itimerval) { { 0, 1000000/hz() },
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{ 0, 1000000/hz() }});
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int old, new;
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if(to_real){
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old = ITIMER_VIRTUAL;
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new = ITIMER_REAL;
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}
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else {
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old = ITIMER_REAL;
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new = ITIMER_VIRTUAL;
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}
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if((setitimer(old, &disable, NULL) < 0) ||
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(setitimer(new, &enable, NULL)))
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printk("switch_timers - setitimer failed, errno = %d\n",
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errno);
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}
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unsigned long long os_nsecs(void)
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return((unsigned long long) tv.tv_sec * BILLION + tv.tv_usec * 1000);
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}
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void idle_sleep(int secs)
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{
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struct timespec ts;
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ts.tv_sec = secs;
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ts.tv_nsec = 0;
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nanosleep(&ts, NULL);
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}
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