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.

diff --git a/ChangeLog b/ChangeLog
index 0e22a702e9ef1b52a043e1976dd678ef22dbfad5..8a6c668fb5dffe3ce9760db7b6ca202ac3c86489 100644 (file)
--- 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
index 16d7c4513437207049e5fc163fa1153c8ff39b97..ac972a954261fb1f4f991d57a243f836eddedf61 100644 (file)
--- 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