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[PATCH] lightweight robust futexes updates 2

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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>
This commit is contained in:
Ingo Molnar 2006-03-27 01:16:28 -08:00 committed by Linus Torvalds
parent 8f17d3a504
commit 76b81e2b0e
1 changed files with 4 additions and 10 deletions
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14
include/linux/futex.h
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@ -79,22 +79,16 @@ struct robust_list_head {
*/ */
#define FUTEX_OWNER_DIED 0x40000000 #define FUTEX_OWNER_DIED 0x40000000
/*
* Reserved bit:
*/
#define FUTEX_OWNER_PENDING 0x20000000
/* /*
* The rest of the robust-futex field is for the TID: * 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 * This limit protects against a deliberately circular list.
* for some time. This also protects against a deliberately circular * (Not worth introducing an rlimit for it)
* list. Not worth introducing an rlimit for this:
*/ */
#define ROBUST_LIST_LIMIT 1048576 #define ROBUST_LIST_LIMIT 2048
long do_futex(unsigned long uaddr, int op, int val, long do_futex(unsigned long uaddr, int op, int val,
unsigned long timeout, unsigned long uaddr2, int val2, unsigned long timeout, unsigned long uaddr2, int val2,