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authorIngo Molnar <mingo@elte.hu>2006-03-27 01:16:28 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-27 08:44:50 -0800
commit76b81e2b0e2241accebcc68e126bc5ab958661b9 (patch)
tree0d99cdc838cc2e7a5c383a56ec707ac739739d2c
parent8f17d3a5049d32392b79925c73a0cf99ce6d5af0 (diff)
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[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>
-rw-r--r--include/linux/futex.h14
1 files changed, 4 insertions, 10 deletions
diff --git a/include/linux/futex.h b/include/linux/futex.h
index 55fff96..966a5b3 100644
--- a/include/linux/futex.h
+++ b/include/linux/futex.h
@@ -80,21 +80,15 @@ 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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