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/atomic.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/atomic.h')
| -rw-r--r-- | kernel/arch/microblaze/include/asm/atomic.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/kernel/arch/microblaze/include/asm/atomic.h b/kernel/arch/microblaze/include/asm/atomic.h new file mode 100644 index 000000000..42ac382a0 --- /dev/null +++ b/kernel/arch/microblaze/include/asm/atomic.h @@ -0,0 +1,27 @@ +#ifndef _ASM_MICROBLAZE_ATOMIC_H +#define _ASM_MICROBLAZE_ATOMIC_H + +#include <asm/cmpxchg.h> +#include <asm-generic/atomic.h> +#include <asm-generic/atomic64.h> + +/* + * Atomically test *v and decrement if it is greater than 0. + * The function returns the old value of *v minus 1. + */ +static inline int atomic_dec_if_positive(atomic_t *v) +{ + unsigned long flags; + int res; + + local_irq_save(flags); + res = v->counter - 1; + if (res >= 0) + v->counter = res; + local_irq_restore(flags); + + return res; +} +#define atomic_dec_if_positive atomic_dec_if_positive + +#endif /* _ASM_MICROBLAZE_ATOMIC_H */ |