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Subject[patch 08/28] posix-timers: Cleanup restart_block usage
posix timers still use the legacy arg0-arg3 members of
restart_block. Use restart_block.nanosleep instead

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Richard Cochran <richard.cochran@omicron.at>
---
kernel/posix-cpu-timers.c | 38 +++++++++++++++-----------------------
kernel/posix-timers.c | 2 +-
2 files changed, 16 insertions(+), 24 deletions(-)

Index: linux-2.6-tip/kernel/posix-cpu-timers.c
===================================================================
--- linux-2.6-tip.orig/kernel/posix-cpu-timers.c
+++ linux-2.6-tip/kernel/posix-cpu-timers.c
@@ -1485,7 +1485,7 @@ int posix_cpu_nsleep(const clockid_t whi
struct timespec *rqtp, struct timespec __user *rmtp)
{
struct restart_block *restart_block =
- &current_thread_info()->restart_block;
+ &current_thread_info()->restart_block;
struct itimerspec it;
int error;

@@ -1501,50 +1501,42 @@ int posix_cpu_nsleep(const clockid_t whi

if (error == -ERESTART_RESTARTBLOCK) {

- if (flags & TIMER_ABSTIME)
+ if (flags & TIMER_ABSTIME)
return -ERESTARTNOHAND;
/*
- * Report back to the user the time still remaining.
- */
- if (rmtp != NULL && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
+ * Report back to the user the time still remaining.
+ */
+ if (rmtp && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
return -EFAULT;

restart_block->fn = posix_cpu_nsleep_restart;
- restart_block->arg0 = which_clock;
- restart_block->arg1 = (unsigned long) rmtp;
- restart_block->arg2 = rqtp->tv_sec;
- restart_block->arg3 = rqtp->tv_nsec;
+ restart_block->nanosleep.index = which_clock;
+ restart_block->nanosleep.rmtp = rmtp;
+ restart_block->nanosleep.expires = timespec_to_ns(rqtp);
}
return error;
}

long posix_cpu_nsleep_restart(struct restart_block *restart_block)
{
- clockid_t which_clock = restart_block->arg0;
- struct timespec __user *rmtp;
+ clockid_t which_clock = restart_block->nanosleep.index;
struct timespec t;
struct itimerspec it;
int error;

- rmtp = (struct timespec __user *) restart_block->arg1;
- t.tv_sec = restart_block->arg2;
- t.tv_nsec = restart_block->arg3;
+ t = ns_to_timespec(restart_block->nanosleep.expires);

- restart_block->fn = do_no_restart_syscall;
error = do_cpu_nanosleep(which_clock, TIMER_ABSTIME, &t, &it);

if (error == -ERESTART_RESTARTBLOCK) {
+ struct timespec __user *rmtp = restart_block->nanosleep.rmtp;
/*
- * Report back to the user the time still remaining.
- */
- if (rmtp != NULL && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
+ * Report back to the user the time still remaining.
+ */
+ if (rmtp && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
return -EFAULT;

- restart_block->fn = posix_cpu_nsleep_restart;
- restart_block->arg0 = which_clock;
- restart_block->arg1 = (unsigned long) rmtp;
- restart_block->arg2 = t.tv_sec;
- restart_block->arg3 = t.tv_nsec;
+ restart_block->nanosleep.expires = timespec_to_ns(&t);
}
return error;

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
--- linux-2.6-tip.orig/kernel/posix-timers.c
+++ linux-2.6-tip/kernel/posix-timers.c
@@ -1034,7 +1034,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const c
*/
long clock_nanosleep_restart(struct restart_block *restart_block)
{
- clockid_t which_clock = restart_block->arg0;
+ clockid_t which_clock = restart_block->nanosleep.index;
struct k_clock *kc = clockid_to_kclock(which_clock);

return kc->nsleep_restart(restart_block);



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