From 76b81e2b0e2241accebcc68e126bc5ab958661b9 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 27 Mar 2006 01:16:28 -0800
Subject: [PATCH] [PATCH] lightweight robust futexes updates 2
futex.h updates:
- get rid of FUTEX_OWNER_PENDING - it's not used
- reduce ROBUST_LIST_LIMIT to a saner value
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
include/linux/futex.h | 14 ++++----------
1 file changed, 4 insertions(+), 10 deletions(-)
diff --git a/include/linux/futex.h b/include/linux/futex.h
index 55fff96ae859..966a5b3da439 100644
--- a/include/linux/futex.h
+++ b/include/linux/futex.h
@@ -79,22 +79,16 @@ struct robust_list_head {
*/
#define FUTEX_OWNER_DIED 0x40000000
-/*
- * Reserved bit:
- */
-#define FUTEX_OWNER_PENDING 0x20000000
-
/*
* The rest of the robust-futex field is for the TID:
*/
-#define FUTEX_TID_MASK 0x1fffffff
+#define FUTEX_TID_MASK 0x3fffffff
/*
- * A limit of one million locks held per thread (!) ought to be enough
- * for some time. This also protects against a deliberately circular
- * list. Not worth introducing an rlimit for this:
+ * This limit protects against a deliberately circular list.
+ * (Not worth introducing an rlimit for it)
*/
-#define ROBUST_LIST_LIMIT 1048576
+#define ROBUST_LIST_LIMIT 2048
long do_futex(unsigned long uaddr, int op, int val,
unsigned long timeout, unsigned long uaddr2, int val2,
--
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