From 295132ff052b32960207d82a950c0efbf0766857 Mon Sep 17 00:00:00 2001 From: Andreas Schwab Date: Tue, 6 Nov 2018 09:23:02 +0100 Subject: [PATCH] RISC-V: don't assume PI mutexes and robust futexes before 4.20 (bug 23864) Support for futex_cmpxchg as only been added to 4.20-rc1. --- ChangeLog | 7 +++++++ sysdeps/unix/sysv/linux/riscv/kernel-features.h | 5 +++++ 2 files changed, 12 insertions(+) diff --git a/ChangeLog b/ChangeLog index 4ff4c13..6be02a7 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2018-11-07 Andreas Schwab + + [BZ #23864] + * sysdeps/unix/sysv/linux/riscv/kernel-features.h + (__ASSUME_SET_ROBUST_LIST) [__LINUX_KERNEL_VERSION < 0x041400]: + Undef. + 2018-11-06 Joseph Myers [BZ #23862] diff --git a/sysdeps/unix/sysv/linux/riscv/kernel-features.h b/sysdeps/unix/sysv/linux/riscv/kernel-features.h index 37f4d99..d21c824 100644 --- a/sysdeps/unix/sysv/linux/riscv/kernel-features.h +++ b/sysdeps/unix/sysv/linux/riscv/kernel-features.h @@ -21,3 +21,8 @@ #undef __ASSUME_CLONE_DEFAULT #define __ASSUME_CLONE_BACKWARDS 1 + +/* No support for PI mutexes or robust futexes before 4.20. */ +#if __LINUX_KERNEL_VERSION < 0x041400 +# undef __ASSUME_SET_ROBUST_LIST +#endif -- 2.7.4