Remove documentation of lowlevellock systemtap probes.

The probes are not provided on all architectures (and only partially by the x86 assembly implementation), and we are not aware of actual uses of these probes. a need for them.
git-mirror · Jun 30, 2015 · 4ac0fd4 · 4ac0fd4
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diff --git a/ChangeLog b/ChangeLog
@@ -1,5 +1,8 @@
 2015-06-30  Torvald Riegel  <triegel@redhat.com>
 
+	* nptl/DESIGN-systemtap-probes.txt: Remove lll_lock_wait,
+	lll_lock_wait_private and lll_futex_wake probes.
+
 	* sysdeps/unix/sysv/linux/i386/lowlevellock.h (BUSY_WAIT_NOP): Remove.
 	* sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (BUSY_WAIT_NOP):
 	Likewise.

diff --git a/nptl/DESIGN-systemtap-probes.txt b/nptl/DESIGN-systemtap-probes.txt
@@ -53,22 +53,6 @@ rdlock_acquire_read - probe for pthread_rwlock_rdlock after successfully getting
 rwlock_unlock - probe for pthread_rwlock_unlock
               arg1 = address of rw lock
 
-lll_lock_wait - probe in low-level (assembly language) locking code, only fired
-                when futex/FUTEX_WAIT is called (i.e. when trying to acquire a
-                contented lock)
-              arg1 = pointer to futex
-              arg2 = flags passed to the futex system call
-lll_lock_wait_private - probe in low-level (assembly language) locking code,
-                        only fired when futex/FUTEX_WAIT is called (i.e. when
-                        trying to acquire a contented lock)
-                      arg1 = pointer to futex
-
-lll_futex_wake - probe in low-level (assembly language) locking code, only fired
-                 when futex (FUTEX_WAKE) is called
-               arg1 = pointer to futex
-               arg2 = number of processes to wake
-               arg3 = additional flags
-
 Condition variable Probes
 =========================
 cond_init - probe for pthread_cond_init