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[PATCH] posix-timers: Fix clock_nanosleep() doesn't return the remaining time in compatibility mode

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The clock_nanosleep() function does not return the time remaining when the
sleep is interrupted by a signal.

This patch creates a new call out, compat_clock_nanosleep_restart(), which
handles returning the remaining time after a sleep is interrupted.  This
patch revives clock_nanosleep_restart().  It is now accessed via the new
call out.  The compat_clock_nanosleep_restart() is used for compatibility
access.

Since this is implemented in compatibility mode the normal path is
virtually unaffected - no real performance impact.

Signed-off-by: Toyo Abe <toyoa@mvista.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Toyo Abe
2006-09-29 02:00:28 -07:00
committed by Linus Torvalds
parent 9c4751fd0e
commit 1711ef3866
6 changed files with 81 additions and 15 deletions
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21
kernel/posix-timers.c
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@@ -973,3 +973,24 @@ sys_clock_nanosleep(const clockid_t which_clock, int flags,
return CLOCK_DISPATCH(which_clock, nsleep,
(which_clock, flags, &t, rmtp));
}
/*
* nanosleep_restart for monotonic and realtime clocks
*/
static int common_nsleep_restart(struct restart_block *restart_block)
{
return hrtimer_nanosleep_restart(restart_block);
}
/*
* This will restart clock_nanosleep. This is required only by
* compat_clock_nanosleep_restart for now.
*/
long
clock_nanosleep_restart(struct restart_block *restart_block)
{
clockid_t which_clock = restart_block->arg0;
return CLOCK_DISPATCH(which_clock, nsleep_restart,
(restart_block));
}