Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 860 insertions, 0 deletions

diff --git a/kernel/compat.c b/kernel/compat.c
new file mode 100644
index 000000000000..dad10656bf14
--- /dev/null
+++ b/kernel/compat.c
@@ -0,0 +1,860 @@
+/*
+ *  linux/kernel/compat.c
+ *
+ *  Kernel compatibililty routines for e.g. 32 bit syscall support
+ *  on 64 bit kernels.
+ *
+ *  Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+#include <linux/compat.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/signal.h>
+#include <linux/sched.h>        /* for MAX_SCHEDULE_TIMEOUT */
+#include <linux/futex.h>        /* for FUTEX_WAIT */
+#include <linux/syscalls.h>
+#include <linux/unistd.h>
+#include <linux/security.h>
+
+#include <asm/uaccess.h>
+#include <asm/bug.h>
+
+int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts)
+{
+        return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) ||
+                        __get_user(ts->tv_sec, &cts->tv_sec) ||
+                        __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
+}
+
+int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts)
+{
+        return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) ||
+                        __put_user(ts->tv_sec, &cts->tv_sec) ||
+                        __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
+}
+
+static long compat_nanosleep_restart(struct restart_block *restart)
+{
+        unsigned long expire = restart->arg0, now = jiffies;
+        struct compat_timespec __user *rmtp;
+
+        /* Did it expire while we handled signals? */
+        if (!time_after(expire, now))
+                return 0;
+
+        current->state = TASK_INTERRUPTIBLE;
+        expire = schedule_timeout(expire - now);
+        if (expire == 0)
+                return 0;
+
+        rmtp = (struct compat_timespec __user *)restart->arg1;
+        if (rmtp) {
+                struct compat_timespec ct;
+                struct timespec t;
+
+                jiffies_to_timespec(expire, &t);
+                ct.tv_sec = t.tv_sec;
+                ct.tv_nsec = t.tv_nsec;
+                if (copy_to_user(rmtp, &ct, sizeof(ct)))
+                        return -EFAULT;
+        }
+        /* The 'restart' block is already filled in */
+        return -ERESTART_RESTARTBLOCK;
+}
+
+asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
+                struct compat_timespec __user *rmtp)
+{
+        struct timespec t;
+        struct restart_block *restart;
+        unsigned long expire;
+
+        if (get_compat_timespec(&t, rqtp))
+                return -EFAULT;
+
+        if ((t.tv_nsec >= 1000000000L) || (t.tv_nsec < 0) || (t.tv_sec < 0))
+                return -EINVAL;
+
+        expire = timespec_to_jiffies(&t) + (t.tv_sec || t.tv_nsec);
+        current->state = TASK_INTERRUPTIBLE;
+        expire = schedule_timeout(expire);
+        if (expire == 0)
+                return 0;
+
+        if (rmtp) {
+                jiffies_to_timespec(expire, &t);
+                if (put_compat_timespec(&t, rmtp))
+                        return -EFAULT;
+        }
+        restart = &current_thread_info()->restart_block;
+        restart->fn = compat_nanosleep_restart;
+        restart->arg0 = jiffies + expire;
+        restart->arg1 = (unsigned long) rmtp;
+        return -ERESTART_RESTARTBLOCK;
+}
+
+static inline long get_compat_itimerval(struct itimerval *o,
+                struct compat_itimerval __user *i)
+{
+        return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
+                (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
+                 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
+                 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
+                 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
+}
+
+static inline long put_compat_itimerval(struct compat_itimerval __user *o,
+                struct itimerval *i)
+{
+        return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
+                (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
+                 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
+                 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
+                 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
+}
+
+asmlinkage long compat_sys_getitimer(int which,
+                struct compat_itimerval __user *it)
+{
+        struct itimerval kit;
+        int error;
+
+        error = do_getitimer(which, &kit);
+        if (!error && put_compat_itimerval(it, &kit))
+                error = -EFAULT;
+        return error;
+}
+
+asmlinkage long compat_sys_setitimer(int which,
+                struct compat_itimerval __user *in,
+                struct compat_itimerval __user *out)
+{
+        struct itimerval kin, kout;
+        int error;
+
+        if (in) {
+                if (get_compat_itimerval(&kin, in))
+                        return -EFAULT;
+        } else
+                memset(&kin, 0, sizeof(kin));
+
+        error = do_setitimer(which, &kin, out ? &kout : NULL);
+        if (error || !out)
+                return error;
+        if (put_compat_itimerval(out, &kout))
+                return -EFAULT;
+        return 0;
+}
+
+asmlinkage long compat_sys_times(struct compat_tms __user *tbuf)
+{
+        /*
+         *      In the SMP world we might just be unlucky and have one of
+         *      the times increment as we use it. Since the value is an
+         *      atomically safe type this is just fine. Conceptually its
+         *      as if the syscall took an instant longer to occur.
+         */
+        if (tbuf) {
+                struct compat_tms tmp;
+                struct task_struct *tsk = current;
+                struct task_struct *t;
+                cputime_t utime, stime, cutime, cstime;
+
+                read_lock(&tasklist_lock);
+                utime = tsk->signal->utime;
+                stime = tsk->signal->stime;
+                t = tsk;
+                do {
+                        utime = cputime_add(utime, t->utime);
+                        stime = cputime_add(stime, t->stime);
+                        t = next_thread(t);
+                } while (t != tsk);
+
+                /*
+                 * While we have tasklist_lock read-locked, no dying thread
+                 * can be updating current->signal->[us]time.  Instead,
+                 * we got their counts included in the live thread loop.
+                 * However, another thread can come in right now and
+                 * do a wait call that updates current->signal->c[us]time.
+                 * To make sure we always see that pair updated atomically,
+                 * we take the siglock around fetching them.
+                 */
+                spin_lock_irq(&tsk->sighand->siglock);
+                cutime = tsk->signal->cutime;
+                cstime = tsk->signal->cstime;
+                spin_unlock_irq(&tsk->sighand->siglock);
+                read_unlock(&tasklist_lock);
+
+                tmp.tms_utime = compat_jiffies_to_clock_t(cputime_to_jiffies(utime));
+                tmp.tms_stime = compat_jiffies_to_clock_t(cputime_to_jiffies(stime));
+                tmp.tms_cutime = compat_jiffies_to_clock_t(cputime_to_jiffies(cutime));
+                tmp.tms_cstime = compat_jiffies_to_clock_t(cputime_to_jiffies(cstime));
+                if (copy_to_user(tbuf, &tmp, sizeof(tmp)))
+                        return -EFAULT;
+        }
+        return compat_jiffies_to_clock_t(jiffies);
+}
+
+/*
+ * Assumption: old_sigset_t and compat_old_sigset_t are both
+ * types that can be passed to put_user()/get_user().
+ */
+
+asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set)
+{
+        old_sigset_t s;
+        long ret;
+        mm_segment_t old_fs = get_fs();
+
+        set_fs(KERNEL_DS);
+        ret = sys_sigpending((old_sigset_t __user *) &s);
+        set_fs(old_fs);
+        if (ret == 0)
+                ret = put_user(s, set);
+        return ret;
+}
+
+asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set,
+                compat_old_sigset_t __user *oset)
+{
+        old_sigset_t s;
+        long ret;
+        mm_segment_t old_fs;
+
+        if (set && get_user(s, set))
+                return -EFAULT;
+        old_fs = get_fs();
+        set_fs(KERNEL_DS);
+        ret = sys_sigprocmask(how,
+                              set ? (old_sigset_t __user *) &s : NULL,
+                              oset ? (old_sigset_t __user *) &s : NULL);
+        set_fs(old_fs);
+        if (ret == 0)
+                if (oset)
+                        ret = put_user(s, oset);
+        return ret;
+}
+
+#ifdef CONFIG_FUTEX
+asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, int val,
+                struct compat_timespec __user *utime, u32 __user *uaddr2,
+                int val3)
+{
+        struct timespec t;
+        unsigned long timeout = MAX_SCHEDULE_TIMEOUT;
+        int val2 = 0;
+
+        if ((op == FUTEX_WAIT) && utime) {
+                if (get_compat_timespec(&t, utime))
+                        return -EFAULT;
+                timeout = timespec_to_jiffies(&t) + 1;
+        }
+        if (op >= FUTEX_REQUEUE)
+                val2 = (int) (unsigned long) utime;
+
+        return do_futex((unsigned long)uaddr, op, val, timeout,
+                        (unsigned long)uaddr2, val2, val3);
+}
+#endif
+
+asmlinkage long compat_sys_setrlimit(unsigned int resource,
+                struct compat_rlimit __user *rlim)
+{
+        struct rlimit r;
+        int ret;
+        mm_segment_t old_fs = get_fs ();
+
+        if (resource >= RLIM_NLIMITS) 
+                return -EINVAL; 
+
+        if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) ||
+            __get_user(r.rlim_cur, &rlim->rlim_cur) ||
+            __get_user(r.rlim_max, &rlim->rlim_max))
+                return -EFAULT;
+
+        if (r.rlim_cur == COMPAT_RLIM_INFINITY)
+                r.rlim_cur = RLIM_INFINITY;
+        if (r.rlim_max == COMPAT_RLIM_INFINITY)
+                r.rlim_max = RLIM_INFINITY;
+        set_fs(KERNEL_DS);
+        ret = sys_setrlimit(resource, (struct rlimit __user *) &r);
+        set_fs(old_fs);
+        return ret;
+}
+
+#ifdef COMPAT_RLIM_OLD_INFINITY
+
+asmlinkage long compat_sys_old_getrlimit(unsigned int resource,
+                struct compat_rlimit __user *rlim)
+{
+        struct rlimit r;
+        int ret;
+        mm_segment_t old_fs = get_fs();
+
+        set_fs(KERNEL_DS);
+        ret = sys_old_getrlimit(resource, &r);
+        set_fs(old_fs);
+
+        if (!ret) {
+                if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY)
+                        r.rlim_cur = COMPAT_RLIM_INFINITY;
+                if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY)
+                        r.rlim_max = COMPAT_RLIM_INFINITY;
+
+                if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
+                    __put_user(r.rlim_cur, &rlim->rlim_cur) ||
+                    __put_user(r.rlim_max, &rlim->rlim_max))
+                        return -EFAULT;
+        }
+        return ret;
+}
+
+#endif
+
+asmlinkage long compat_sys_getrlimit (unsigned int resource,
+                struct compat_rlimit __user *rlim)
+{
+        struct rlimit r;
+        int ret;
+        mm_segment_t old_fs = get_fs();
+
+        set_fs(KERNEL_DS);
+        ret = sys_getrlimit(resource, (struct rlimit __user *) &r);
+        set_fs(old_fs);
+        if (!ret) {
+                if (r.rlim_cur > COMPAT_RLIM_INFINITY)
+                        r.rlim_cur = COMPAT_RLIM_INFINITY;
+                if (r.rlim_max > COMPAT_RLIM_INFINITY)
+                        r.rlim_max = COMPAT_RLIM_INFINITY;
+
+                if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
+                    __put_user(r.rlim_cur, &rlim->rlim_cur) ||
+                    __put_user(r.rlim_max, &rlim->rlim_max))
+                        return -EFAULT;
+        }
+        return ret;
+}
+
+int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru)
+{
+        if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) ||
+            __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) ||
+            __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) ||
+            __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) ||
+            __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) ||
+            __put_user(r->ru_maxrss, &ru->ru_maxrss) ||
+            __put_user(r->ru_ixrss, &ru->ru_ixrss) ||
+            __put_user(r->ru_idrss, &ru->ru_idrss) ||
+            __put_user(r->ru_isrss, &ru->ru_isrss) ||
+            __put_user(r->ru_minflt, &ru->ru_minflt) ||
+            __put_user(r->ru_majflt, &ru->ru_majflt) ||
+            __put_user(r->ru_nswap, &ru->ru_nswap) ||
+            __put_user(r->ru_inblock, &ru->ru_inblock) ||
+            __put_user(r->ru_oublock, &ru->ru_oublock) ||
+            __put_user(r->ru_msgsnd, &ru->ru_msgsnd) ||
+            __put_user(r->ru_msgrcv, &ru->ru_msgrcv) ||
+            __put_user(r->ru_nsignals, &ru->ru_nsignals) ||
+            __put_user(r->ru_nvcsw, &ru->ru_nvcsw) ||
+            __put_user(r->ru_nivcsw, &ru->ru_nivcsw))
+                return -EFAULT;
+        return 0;
+}
+
+asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru)
+{
+        struct rusage r;
+        int ret;
+        mm_segment_t old_fs = get_fs();
+
+        set_fs(KERNEL_DS);
+        ret = sys_getrusage(who, (struct rusage __user *) &r);
+        set_fs(old_fs);
+
+        if (ret)
+                return ret;
+
+        if (put_compat_rusage(&r, ru))
+                return -EFAULT;
+
+        return 0;
+}
+
+asmlinkage long
+compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options,
+        struct compat_rusage __user *ru)
+{
+        if (!ru) {
+                return sys_wait4(pid, stat_addr, options, NULL);
+        } else {
+                struct rusage r;
+                int ret;
+                unsigned int status;
+                mm_segment_t old_fs = get_fs();
+
+                set_fs (KERNEL_DS);
+                ret = sys_wait4(pid,
+                                (stat_addr ?
+                                 (unsigned int __user *) &status : NULL),
+                                options, (struct rusage __user *) &r);
+                set_fs (old_fs);
+
+                if (ret > 0) {
+                        if (put_compat_rusage(&r, ru))
+                                return -EFAULT;
+                        if (stat_addr && put_user(status, stat_addr))
+                                return -EFAULT;
+                }
+                return ret;
+        }
+}
+
+asmlinkage long compat_sys_waitid(int which, compat_pid_t pid,
+                struct compat_siginfo __user *uinfo, int options,
+                struct compat_rusage __user *uru)
+{
+        siginfo_t info;
+        struct rusage ru;
+        long ret;
+        mm_segment_t old_fs = get_fs();
+
+        memset(&info, 0, sizeof(info));
+
+        set_fs(KERNEL_DS);
+        ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options,
+                         uru ? (struct rusage __user *)&ru : NULL);
+        set_fs(old_fs);
+
+        if ((ret < 0) || (info.si_signo == 0))
+                return ret;
+
+        if (uru) {
+                ret = put_compat_rusage(&ru, uru);
+                if (ret)
+                        return ret;
+        }
+
+        BUG_ON(info.si_code & __SI_MASK);
+        info.si_code |= __SI_CHLD;
+        return copy_siginfo_to_user32(uinfo, &info);
+}
+
+static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
+                                    unsigned len, cpumask_t *new_mask)
+{
+        unsigned long *k;
+
+        if (len < sizeof(cpumask_t))
+                memset(new_mask, 0, sizeof(cpumask_t));
+        else if (len > sizeof(cpumask_t))
+                len = sizeof(cpumask_t);
+
+        k = cpus_addr(*new_mask);
+        return compat_get_bitmap(k, user_mask_ptr, len * 8);
+}
+
+asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
+                                             unsigned int len,
+                                             compat_ulong_t __user *user_mask_ptr)
+{
+        cpumask_t new_mask;
+        int retval;
+
+        retval = compat_get_user_cpu_mask(user_mask_ptr, len, &new_mask);
+        if (retval)
+                return retval;
+
+        return sched_setaffinity(pid, new_mask);
+}
+
+asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
+                                             compat_ulong_t __user *user_mask_ptr)
+{
+        int ret;
+        cpumask_t mask;
+        unsigned long *k;
+        unsigned int min_length = sizeof(cpumask_t);
+
+        if (NR_CPUS <= BITS_PER_COMPAT_LONG)
+                min_length = sizeof(compat_ulong_t);
+
+        if (len < min_length)
+                return -EINVAL;
+
+        ret = sched_getaffinity(pid, &mask);
+        if (ret < 0)
+                return ret;
+
+        k = cpus_addr(mask);
+        ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8);
+        if (ret)
+                return ret;
+
+        return min_length;
+}
+
+static int get_compat_itimerspec(struct itimerspec *dst, 
+                                 struct compat_itimerspec __user *src)
+{ 
+        if (get_compat_timespec(&dst->it_interval, &src->it_interval) ||
+            get_compat_timespec(&dst->it_value, &src->it_value))
+                return -EFAULT;
+        return 0;
+} 
+
+static int put_compat_itimerspec(struct compat_itimerspec __user *dst, 
+                                 struct itimerspec *src)
+{ 
+        if (put_compat_timespec(&src->it_interval, &dst->it_interval) ||
+            put_compat_timespec(&src->it_value, &dst->it_value))
+                return -EFAULT;
+        return 0;
+} 
+
+long compat_sys_timer_settime(timer_t timer_id, int flags,
+                          struct compat_itimerspec __user *new, 
+                          struct compat_itimerspec __user *old)
+{ 
+        long err;
+        mm_segment_t oldfs;
+        struct itimerspec newts, oldts;
+
+        if (!new)
+                return -EINVAL;
+        if (get_compat_itimerspec(&newts, new))
+                return -EFAULT; 
+        oldfs = get_fs();
+        set_fs(KERNEL_DS);
+        err = sys_timer_settime(timer_id, flags,
+                                (struct itimerspec __user *) &newts,
+                                (struct itimerspec __user *) &oldts);
+        set_fs(oldfs); 
+        if (!err && old && put_compat_itimerspec(old, &oldts))
+                return -EFAULT;
+        return err;
+} 
+
+long compat_sys_timer_gettime(timer_t timer_id,
+                struct compat_itimerspec __user *setting)
+{ 
+        long err;
+        mm_segment_t oldfs;
+        struct itimerspec ts; 
+
+        oldfs = get_fs();
+        set_fs(KERNEL_DS);
+        err = sys_timer_gettime(timer_id,
+                                (struct itimerspec __user *) &ts); 
+        set_fs(oldfs); 
+        if (!err && put_compat_itimerspec(setting, &ts))
+                return -EFAULT;
+        return err;
+} 
+
+long compat_sys_clock_settime(clockid_t which_clock,
+                struct compat_timespec __user *tp)
+{
+        long err;
+        mm_segment_t oldfs;
+        struct timespec ts; 
+
+        if (get_compat_timespec(&ts, tp))
+                return -EFAULT; 
+        oldfs = get_fs();
+        set_fs(KERNEL_DS);      
+        err = sys_clock_settime(which_clock,
+                                (struct timespec __user *) &ts);
+        set_fs(oldfs);
+        return err;
+} 
+
+long compat_sys_clock_gettime(clockid_t which_clock,
+                struct compat_timespec __user *tp)
+{
+        long err;
+        mm_segment_t oldfs;
+        struct timespec ts; 
+
+        oldfs = get_fs();
+        set_fs(KERNEL_DS);
+        err = sys_clock_gettime(which_clock,
+                                (struct timespec __user *) &ts);
+        set_fs(oldfs);
+        if (!err && put_compat_timespec(&ts, tp))
+                return -EFAULT; 
+        return err;
+} 
+
+long compat_sys_clock_getres(clockid_t which_clock,
+                struct compat_timespec __user *tp)
+{
+        long err;
+        mm_segment_t oldfs;
+        struct timespec ts; 
+
+        oldfs = get_fs();
+        set_fs(KERNEL_DS);
+        err = sys_clock_getres(which_clock,
+                               (struct timespec __user *) &ts);
+        set_fs(oldfs);
+        if (!err && tp && put_compat_timespec(&ts, tp))
+                return -EFAULT; 
+        return err;
+} 
+
+long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
+                            struct compat_timespec __user *rqtp,
+                            struct compat_timespec __user *rmtp)
+{
+        long err;
+        mm_segment_t oldfs;
+        struct timespec in, out; 
+
+        if (get_compat_timespec(&in, rqtp)) 
+                return -EFAULT;
+
+        oldfs = get_fs();
+        set_fs(KERNEL_DS);
+        err = sys_clock_nanosleep(which_clock, flags,
+                                  (struct timespec __user *) &in,
+                                  (struct timespec __user *) &out);
+        set_fs(oldfs);
+        if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
+            put_compat_timespec(&out, rmtp))
+                return -EFAULT;
+        return err;     
+} 
+
+/*
+ * We currently only need the following fields from the sigevent
+ * structure: sigev_value, sigev_signo, sig_notify and (sometimes
+ * sigev_notify_thread_id).  The others are handled in user mode.
+ * We also assume that copying sigev_value.sival_int is sufficient
+ * to keep all the bits of sigev_value.sival_ptr intact.
+ */
+int get_compat_sigevent(struct sigevent *event,
+                const struct compat_sigevent __user *u_event)
+{
+        memset(&event, 0, sizeof(*event));
+        return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) ||
+                __get_user(event->sigev_value.sival_int,
+                        &u_event->sigev_value.sival_int) ||
+                __get_user(event->sigev_signo, &u_event->sigev_signo) ||
+                __get_user(event->sigev_notify, &u_event->sigev_notify) ||
+                __get_user(event->sigev_notify_thread_id,
+                        &u_event->sigev_notify_thread_id))
+                ? -EFAULT : 0;
+}
+
+/* timer_create is architecture specific because it needs sigevent conversion */
+
+long compat_get_bitmap(unsigned long *mask, compat_ulong_t __user *umask,
+                       unsigned long bitmap_size)
+{
+        int i, j;
+        unsigned long m;
+        compat_ulong_t um;
+        unsigned long nr_compat_longs;
+
+        /* align bitmap up to nearest compat_long_t boundary */
+        bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG);
+
+        if (!access_ok(VERIFY_READ, umask, bitmap_size / 8))
+                return -EFAULT;
+
+        nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
+
+        for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) {
+                m = 0;
+
+                for (j = 0; j < sizeof(m)/sizeof(um); j++) {
+                        /*
+                         * We dont want to read past the end of the userspace
+                         * bitmap. We must however ensure the end of the
+                         * kernel bitmap is zeroed.
+                         */
+                        if (nr_compat_longs-- > 0) {
+                                if (__get_user(um, umask))
+                                        return -EFAULT;
+                        } else {
+                                um = 0;
+                        }
+
+                        umask++;
+                        m |= (long)um << (j * BITS_PER_COMPAT_LONG);
+                }
+                *mask++ = m;
+        }
+
+        return 0;
+}
+
+long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
+                       unsigned long bitmap_size)
+{
+        int i, j;
+        unsigned long m;
+        compat_ulong_t um;
+        unsigned long nr_compat_longs;
+
+        /* align bitmap up to nearest compat_long_t boundary */
+        bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG);
+
+        if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8))
+                return -EFAULT;
+
+        nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
+
+        for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) {
+                m = *mask++;
+
+                for (j = 0; j < sizeof(m)/sizeof(um); j++) {
+                        um = m;
+
+                        /*
+                         * We dont want to write past the end of the userspace
+                         * bitmap.
+                         */
+                        if (nr_compat_longs-- > 0) {
+                                if (__put_user(um, umask))
+                                        return -EFAULT;
+                        }
+
+                        umask++;
+                        m >>= 4*sizeof(um);
+                        m >>= 4*sizeof(um);
+                }
+        }
+
+        return 0;
+}
+
+void
+sigset_from_compat (sigset_t *set, compat_sigset_t *compat)
+{
+        switch (_NSIG_WORDS) {
+#if defined (__COMPAT_ENDIAN_SWAP__)
+        case 4: set->sig[3] = compat->sig[7] | (((long)compat->sig[6]) << 32 );
+        case 3: set->sig[2] = compat->sig[5] | (((long)compat->sig[4]) << 32 );
+        case 2: set->sig[1] = compat->sig[3] | (((long)compat->sig[2]) << 32 );
+        case 1: set->sig[0] = compat->sig[1] | (((long)compat->sig[0]) << 32 );
+#else
+        case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 );
+        case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 );
+        case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 );
+        case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 );
+#endif
+        }
+}
+
+asmlinkage long
+compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese,
+                struct compat_siginfo __user *uinfo,
+                struct compat_timespec __user *uts, compat_size_t sigsetsize)
+{
+        compat_sigset_t s32;
+        sigset_t s;
+        int sig;
+        struct timespec t;
+        siginfo_t info;
+        long ret, timeout = 0;
+
+        if (sigsetsize != sizeof(sigset_t))
+                return -EINVAL;
+
+        if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t)))
+                return -EFAULT;
+        sigset_from_compat(&s, &s32);
+        sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP));
+        signotset(&s);
+
+        if (uts) {
+                if (get_compat_timespec (&t, uts))
+                        return -EFAULT;
+                if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0
+                                || t.tv_sec < 0)
+                        return -EINVAL;
+        }
+
+        spin_lock_irq(&current->sighand->siglock);
+        sig = dequeue_signal(current, &s, &info);
+        if (!sig) {
+                timeout = MAX_SCHEDULE_TIMEOUT;
+                if (uts)
+                        timeout = timespec_to_jiffies(&t)
+                                +(t.tv_sec || t.tv_nsec);
+                if (timeout) {
+                        current->real_blocked = current->blocked;
+                        sigandsets(&current->blocked, &current->blocked, &s);
+
+                        recalc_sigpending();
+                        spin_unlock_irq(&current->sighand->siglock);
+
+                        current->state = TASK_INTERRUPTIBLE;
+                        timeout = schedule_timeout(timeout);
+
+                        spin_lock_irq(&current->sighand->siglock);
+                        sig = dequeue_signal(current, &s, &info);
+                        current->blocked = current->real_blocked;
+                        siginitset(&current->real_blocked, 0);
+                        recalc_sigpending();
+                }
+        }
+        spin_unlock_irq(&current->sighand->siglock);
+
+        if (sig) {
+                ret = sig;
+                if (uinfo) {
+                        if (copy_siginfo_to_user32(uinfo, &info))
+                                ret = -EFAULT;
+                }
+        }else {
+                ret = timeout?-EINTR:-EAGAIN;
+        }
+        return ret;
+
+}
+
+#ifdef __ARCH_WANT_COMPAT_SYS_TIME
+
+/* compat_time_t is a 32 bit "long" and needs to get converted. */
+
+asmlinkage long compat_sys_time(compat_time_t __user * tloc)
+{
+        compat_time_t i;
+        struct timeval tv;
+
+        do_gettimeofday(&tv);
+        i = tv.tv_sec;
+
+        if (tloc) {
+                if (put_user(i,tloc))
+                        i = -EFAULT;
+        }
+        return i;
+}
+
+asmlinkage long compat_sys_stime(compat_time_t __user *tptr)
+{
+        struct timespec tv;
+        int err;
+
+        if (get_user(tv.tv_sec, tptr))
+                return -EFAULT;
+
+        tv.tv_nsec = 0;
+
+        err = security_settime(&tv, NULL);
+        if (err)
+                return err;
+
+        do_settimeofday(&tv);
+        return 0;
+}
+
+#endif /* __ARCH_WANT_COMPAT_SYS_TIME */