diff options
| author |   Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
|---|---|---|
| committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
| commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
| tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/microblaze/include/asm/cmpxchg.h | |
| parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) | |
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 <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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 <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/microblaze/include/asm/cmpxchg.h')
| -rw-r--r-- | kernel/arch/microblaze/include/asm/cmpxchg.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/kernel/arch/microblaze/include/asm/cmpxchg.h b/kernel/arch/microblaze/include/asm/cmpxchg.h new file mode 100644 index 000000000..538afc0ab --- /dev/null +++ b/kernel/arch/microblaze/include/asm/cmpxchg.h @@ -0,0 +1,42 @@ +#ifndef _ASM_MICROBLAZE_CMPXCHG_H +#define _ASM_MICROBLAZE_CMPXCHG_H + +#include <linux/irqflags.h> + +void __bad_xchg(volatile void *ptr, int size); + +static inline unsigned long __xchg(unsigned long x, volatile void *ptr, + int size) +{ + unsigned long ret; + unsigned long flags; + + switch (size) { + case 1: + local_irq_save(flags); + ret = *(volatile unsigned char *)ptr; + *(volatile unsigned char *)ptr = x; + local_irq_restore(flags); + break; + + case 4: + local_irq_save(flags); + ret = *(volatile unsigned long *)ptr; + *(volatile unsigned long *)ptr = x; + local_irq_restore(flags); + break; + default: + __bad_xchg(ptr, size), ret = 0; + break; + } + + return ret; +} + +#define xchg(ptr, x) \ + ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) + +#include <asm-generic/cmpxchg.h> +#include <asm-generic/cmpxchg-local.h> + +#endif /* _ASM_MICROBLAZE_CMPXCHG_H */ |