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Use C11 atomics instead of atomic_decrement_and_test

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Replace atomic_decrement_and_test with atomic_fetch_add_relaxed.
These are simple counters which do not protect any shared data from
concurrent accesses. Also remove the unused file cond-perf.c.

Passes regress on AArch64.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Wilco Dijkstra
2022-09-22 15:40:37 +01:00
parent d1babeb32d
commit 4a07fbb689
6 changed files with 5 additions and 108 deletions
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2
nptl/pthread_create.c
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@@ -489,7 +489,7 @@ start_thread (void *arg)
the breakpoint reports TD_THR_RUN state rather than TD_THR_ZOMBIE. */
atomic_fetch_or_relaxed (&pd->cancelhandling, EXITING_BITMASK);
if (__glibc_unlikely (atomic_decrement_and_test (&__nptl_nthreads)))
if (__glibc_unlikely (atomic_fetch_add_relaxed (&__nptl_nthreads, -1) == 1))
/* This was the last thread. */
exit (0);