From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/metag/include/asm/cmpxchg_lock1.h | 48 +++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 kernel/arch/metag/include/asm/cmpxchg_lock1.h (limited to 'kernel/arch/metag/include/asm/cmpxchg_lock1.h') diff --git a/kernel/arch/metag/include/asm/cmpxchg_lock1.h b/kernel/arch/metag/include/asm/cmpxchg_lock1.h new file mode 100644 index 000000000..fd6850474 --- /dev/null +++ b/kernel/arch/metag/include/asm/cmpxchg_lock1.h @@ -0,0 +1,48 @@ +#ifndef __ASM_METAG_CMPXCHG_LOCK1_H +#define __ASM_METAG_CMPXCHG_LOCK1_H + +#include + +/* Use LOCK2 as these have to be atomic w.r.t. ordinary accesses. */ + +static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) +{ + unsigned long flags, retval; + + __global_lock2(flags); + fence(); + retval = *m; + *m = val; + __global_unlock2(flags); + return retval; +} + +static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) +{ + unsigned long flags, retval; + + __global_lock2(flags); + fence(); + retval = *m; + *m = val & 0xff; + __global_unlock2(flags); + return retval; +} + +static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, + unsigned long new) +{ + __u32 retval; + unsigned long flags; + + __global_lock2(flags); + retval = *m; + if (retval == old) { + fence(); + *m = new; + } + __global_unlock2(flags); + return retval; +} + +#endif /* __ASM_METAG_CMPXCHG_LOCK1_H */ -- cgit 1.2.3-korg