From 19f1dd5f2dbf794cd6b040093bf2b1ba114b3c15 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Sun, 28 Oct 2012 23:19:00 -0700 Subject: Define a BUSY_WAIT_NOP for sparc. nptl/ * sysdeps/unix/sysv/linux/sparc/lowlevellock.h (BUSY_WAIT_NOP): Define when we have v9 instructions available. * sysdeps/unix/sysv/linux/sparc/sparc64/cpu_relax.S: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/cpu_relax.S: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/Makefile: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/Makefile: Add cpu_relax to libpthread-routines. --- nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h') diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h index fafb0873f8..e0495622a3 100644 --- a/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h @@ -50,6 +50,11 @@ #define LLL_PRIVATE 0 #define LLL_SHARED FUTEX_PRIVATE_FLAG +#ifndef __sparc32_atomic_do_lock +/* Delay in spinlock loop. */ +extern void __cpu_relax(void); +#define BUSY_WAIT_NOP __cpu_relax() +#endif #if !defined NOT_IN_libc || defined IS_IN_rtld /* In libc.so or ld.so all futexes are private. */ -- cgit 1.4.1