Use private futexes for pthread_mutex_t.
This does not change the implementation of conditional variables
since we're waiting for other system components to properly use
pthread_condattr_init/setpshared before that.
Also remove an obsolete x86 source file.
Change-Id: Ia3e3fbac35b87a534fb04d4381c3c66b975bc8f7
diff --git a/libc/docs/CHANGES.TXT b/libc/docs/CHANGES.TXT
index ec147c2..08b2009 100644
--- a/libc/docs/CHANGES.TXT
+++ b/libc/docs/CHANGES.TXT
@@ -83,6 +83,11 @@
- <pthread.h>: Add pthread_condattr_init/destroy/setpshared/getpshared functions
to enable proper shared conditional variable initialization.
+ Modify the pthread_mutex_t implementation to use private futexes for
+ performance reasons. Mutexes are no longer shareable between processes
+ by default anymore, unless you use PTHREAD_PROCESS_SHARED with
+ pthread_mutexattr_setpshared().
+
XXX: The implementation still always uses shared condvars, independent
of the flags being selected. This will change in a later commit.