[PATCH] lightweight robust futexes updates 2 (76b81e2b) · Commits · 戴 / test

futex.h updates: - get rid of FUTEX_OWNER_PENDING - it's not used - reduce ROBUST_LIST_LIMIT to a saner value Signed-off-by:

include/linux/futex.h

+4 −10

Original line number	Diff line number	Diff line
		@@ -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,