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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
sysdeps/nptl/libc_start_call_main.h
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@@ -65,7 +65,7 @@ __libc_start_call_main (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
/* One less thread. Decrement the counter. If it is zero we
terminate the entire process. */
result = 0;
if (! atomic_decrement_and_test (&__nptl_nthreads))
if (atomic_fetch_add_relaxed (&__nptl_nthreads, -1) != 1)
/* Not much left to do but to exit the thread, not the process. */
while (1)
INTERNAL_SYSCALL_CALL (exit, 0);