From 81e294cba2596f5f10848bbe19d98b344c2a2d5c Mon Sep 17 00:00:00 2001
From: Richard Cochran <richard.cochran@omicron.at>
Date: Tue, 1 Feb 2011 13:52:32 +0000
Subject: posix-timers: Add support for fd based clocks
Extend the negative clockids which are currently used by posix cpu
timers to encode the PID with a file descriptor based type which
encodes the fd in the upper bits.
Originally-from: Richard Cochran <richard.cochran@omicron.at>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <20110201134420.062860200@linutronix.de>
---
kernel/posix-timers.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'kernel')
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 5a5a4f1c097..df629d853a8 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -488,7 +488,7 @@ static void release_posix_timer(struct k_itimer *tmr, int it_id_set)
static struct k_clock *clockid_to_kclock(const clockid_t id)
{
if (id < 0)
- return &clock_posix_cpu;
+ return (id & CLOCKFD_MASK) == CLOCKFD ? NULL : &clock_posix_cpu;
if (id >= MAX_CLOCKS || !posix_clocks[id].clock_getres)
return NULL;
--
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