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nptl: Remove private futex optimization [BZ #27304] 

It is effectively used, unexcept for pthread_cond_destroy, where we do
not want it; see bug 27304.  The internal locks do not support a
process-shared mode.

This fixes commit dc6cfdc934 ("nptl:
Move pthread_cond_destroy implementation into libc").

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer 2021-02-04 15:00:20 +01:00
parent 5d5d71b898
commit c4ad832276
1 changed files with 1 additions and 13 deletions
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14
sysdeps/nptl/lowlevellock-futex.h
View File

@ -50,20 +50,8 @@
#define LLL_SHARED FUTEX_PRIVATE_FLAG
#ifndef __ASSEMBLER__
# if IS_IN (libc) || IS_IN (rtld)
/* In libc.so or ld.so all futexes are private. */
# define __lll_private_flag(fl, private) \
({ \
/* Prevent warnings in callers of this macro. */ \
int __lll_private_flag_priv __attribute__ ((unused)); \
__lll_private_flag_priv = (private); \
((fl) | FUTEX_PRIVATE_FLAG); \
})
# else
# define __lll_private_flag(fl, private) \
# define __lll_private_flag(fl, private) \
(((fl) | FUTEX_PRIVATE_FLAG) ^ (private))
# endif
# define lll_futex_syscall(nargs, futexp, op, ...) \
({ \