Starting with 4.4.178, the LTP test
pthread_cond_wait/2-3
when compiled on x86_64 with 'gcc -m32', started failing. It generates this log output:
[16:18:38]Implementation supports the MONOTONIC CLOCK but option is disabled in test. [16:18:38]Test starting [16:18:38] Process-shared primitive will be tested [16:18:38] Alternative clock for cond will be tested [16:18:38]Test 2-3.c FAILED: The child did not own the mutex inside the cleanup handler
A git bisection between 4.4.177..178 shows that this commit is the culprit:
Git-Commit: 79739ad2d0ac5787a15a1acf7caaf34cd95bbf3c Author: Alistair Strachan astrachan@google.com Subject: [PATCH] x86: vdso: Use $LD instead of $CC to link
And, indeed, when I back this patch out of 4.4.178 proper, the above test passes again.
Please consider backing this patch out of linux-4.4.y, and from master, and from any other linux branch it has been backported to.
PS: In backing it out of 4.4.178, I first backed out
7c45b45fd6e928c9ce275c32f6fa98d317e6f5ee
This is a follow-on vdso patch which collides with the patch we are interested in removing. As it claims to be only removing redundant code, it probably should never have been backported in the first place.
Signed-off-by: Joe Korty joe.korty@concurrent-rt.com