From 4ad8b4645c0869431dba632c3ace0061cc613379 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Tue, 15 Jun 2021 22:10:26 -0300 Subject: linux: Remove supports_time64 () from clock_gettime It breaks the usage case of live migration like CRIU or similar. The performance drawback is it would require an extra syscall on older kernels without 64-bit time support. Checked on i686-linux-gnu on a 4.15 kernel and on a 5.11 kernel (with and without --enable-kernel=5.1) and on x86_64-linux-gnu. Reviewed-by: Lukasz Majewski --- sysdeps/unix/sysv/linux/clock_gettime.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) (limited to 'sysdeps/unix/sysv/linux') diff --git a/sysdeps/unix/sysv/linux/clock_gettime.c b/sysdeps/unix/sysv/linux/clock_gettime.c index 781d05c2fd..cfe9370455 100644 --- a/sysdeps/unix/sysv/linux/clock_gettime.c +++ b/sysdeps/unix/sysv/linux/clock_gettime.c @@ -22,7 +22,6 @@ #include #include "kernel-posix-cpu-timers.h" #include -#include #include /* Get current value of CLOCK and store it in TP. */ @@ -35,19 +34,14 @@ __clock_gettime64 (clockid_t clock_id, struct __timespec64 *tp) # define __NR_clock_gettime64 __NR_clock_gettime #endif - if (supports_time64 ()) - { #ifdef HAVE_CLOCK_GETTIME64_VSYSCALL - r = INLINE_VSYSCALL (clock_gettime64, 2, clock_id, tp); + r = INLINE_VSYSCALL (clock_gettime64, 2, clock_id, tp); #else - r = INLINE_SYSCALL_CALL (clock_gettime64, clock_id, tp); + r = INLINE_SYSCALL_CALL (clock_gettime64, clock_id, tp); #endif - if (r == 0 || errno != ENOSYS) - return r; - - mark_time64_unsupported (); - } + if (r == 0 || errno != ENOSYS) + return r; #ifndef __ASSUME_TIME64_SYSCALLS /* Fallback code that uses 32-bit support. */ -- cgit 1.4.1