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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-02-28 11:33:22 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-03-05 16:28:20 -0300 |
| commit | 0ddb7ea842abf63516b74d4b057c052afc6ba863 (patch) | |
| tree | 92b826163313ba3d4b735db59f1971a9b44f3086 /nptl/nptl-init.c | |
| parent | 590675c079d743ecf6fee9f561e46c94633a91ef (diff) | |
| download | glibc-0ddb7ea842abf63516b74d4b057c052afc6ba863.tar.gz glibc-0ddb7ea842abf63516b74d4b057c052afc6ba863.tar.xz glibc-0ddb7ea842abf63516b74d4b057c052afc6ba863.zip | |
nptl: Assume __ASSUME_FUTEX_CLOCK_REALTIME support
This patch assumes realtime clock support for nptl and thus removes all the associated code. For __pthread_mutex_timedlock the fallback usage for the case where lll_futex_timed_wait_bitset it not set define is also removed. The generic lowlevellock-futex.h always define it, so for NPTL code the check always yield true. Checked on x86_64-linux-gnu and i686-linux-gnu. * nptl/nptl-init.c (__have_futex_clock_realtime, __have_futex_clock_realtime): Remove definition. (__pthread_initialize_minimal_internal): Remove FUTEX_CLOCK_REALTIME check test for !__ASSUME_FUTEX_CLOCK_REALTIME. * nptl/pthread_mutex_timedlock.c (__pthread_mutex_timedlock): Assume __ASSUME_FUTEX_CLOCK_REALTIME support. * sysdeps/unix/sysv/linux/i386/lowlevellock.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Likewise. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_FUTEX_CLOCK_REALTIME): Remove. * sysdeps/nptl/lowlevellock-futex.h (lll_futex_timed_wait_bitset): Adjust comment.
Diffstat (limited to 'nptl/nptl-init.c')
| -rw-r--r-- | nptl/nptl-init.c | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/nptl/nptl-init.c b/nptl/nptl-init.c index b5895fabf3..61ec8ed12a 100644 --- a/nptl/nptl-init.c +++ b/nptl/nptl-init.c @@ -58,15 +58,6 @@ int __set_robust_list_avail; # define set_robust_list_not_avail() do { } while (0) #endif -#ifndef __ASSUME_FUTEX_CLOCK_REALTIME -/* Nonzero if we do not have FUTEX_CLOCK_REALTIME. */ -int __have_futex_clock_realtime; -# define __set_futex_clock_realtime() \ - __have_futex_clock_realtime = 1 -#else -#define __set_futex_clock_realtime() do { } while (0) -#endif - /* Version of the library, used in libthread_db to detect mismatches. */ static const char nptl_version[] __attribute_used__ = VERSION; @@ -298,26 +289,6 @@ __pthread_initialize_minimal_internal (void) set_robust_list_not_avail (); } -#ifdef __NR_futex -# ifndef __ASSUME_FUTEX_CLOCK_REALTIME - { - int word = 0; - /* NB: the syscall actually takes six parameters. The last is the - bit mask. But since we will not actually wait at all the value - is irrelevant. Given that passing six parameters is difficult - on some architectures we just pass whatever random value the - calling convention calls for to the kernel. It causes no harm. */ - INTERNAL_SYSCALL_DECL (err); - word = INTERNAL_SYSCALL (futex, err, 5, &word, - FUTEX_WAIT_BITSET | FUTEX_CLOCK_REALTIME - | FUTEX_PRIVATE_FLAG, 1, NULL, 0); - assert (INTERNAL_SYSCALL_ERROR_P (word, err)); - if (INTERNAL_SYSCALL_ERRNO (word, err) != ENOSYS) - __set_futex_clock_realtime (); - } -# endif -#endif - /* Set initial thread's stack block from 0 up to __libc_stack_end. It will be bigger than it actually is, but for unwind.c/pt-longjmp.c purposes this is good enough. */ |