diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/parisc/lib/bitops.c | |
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/parisc/lib/bitops.c')
-rw-r--r-- | kernel/arch/parisc/lib/bitops.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/kernel/arch/parisc/lib/bitops.c b/kernel/arch/parisc/lib/bitops.c new file mode 100644 index 000000000..187118841 --- /dev/null +++ b/kernel/arch/parisc/lib/bitops.c @@ -0,0 +1,82 @@ +/* + * bitops.c: atomic operations which got too long to be inlined all over + * the place. + * + * Copyright 1999 Philipp Rumpf (prumpf@tux.org) + * Copyright 2000 Grant Grundler (grundler@cup.hp.com) + */ + +#include <linux/kernel.h> +#include <linux/spinlock.h> +#include <linux/atomic.h> + +#ifdef CONFIG_SMP +arch_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned = { + [0 ... (ATOMIC_HASH_SIZE-1)] = __ARCH_SPIN_LOCK_UNLOCKED +}; +#endif + +#ifdef CONFIG_64BIT +unsigned long __xchg64(unsigned long x, unsigned long *ptr) +{ + unsigned long temp, flags; + + _atomic_spin_lock_irqsave(ptr, flags); + temp = *ptr; + *ptr = x; + _atomic_spin_unlock_irqrestore(ptr, flags); + return temp; +} +#endif + +unsigned long __xchg32(int x, int *ptr) +{ + unsigned long flags; + long temp; + + _atomic_spin_lock_irqsave(ptr, flags); + temp = (long) *ptr; /* XXX - sign extension wanted? */ + *ptr = x; + _atomic_spin_unlock_irqrestore(ptr, flags); + return (unsigned long)temp; +} + + +unsigned long __xchg8(char x, char *ptr) +{ + unsigned long flags; + long temp; + + _atomic_spin_lock_irqsave(ptr, flags); + temp = (long) *ptr; /* XXX - sign extension wanted? */ + *ptr = x; + _atomic_spin_unlock_irqrestore(ptr, flags); + return (unsigned long)temp; +} + + +#ifdef CONFIG_64BIT +unsigned long __cmpxchg_u64(volatile unsigned long *ptr, unsigned long old, unsigned long new) +{ + unsigned long flags; + unsigned long prev; + + _atomic_spin_lock_irqsave(ptr, flags); + if ((prev = *ptr) == old) + *ptr = new; + _atomic_spin_unlock_irqrestore(ptr, flags); + return prev; +} +#endif + +unsigned long __cmpxchg_u32(volatile unsigned int *ptr, unsigned int old, unsigned int new) +{ + unsigned long flags; + unsigned int prev; + + _atomic_spin_lock_irqsave(ptr, flags); + if ((prev = *ptr) == old) + *ptr = new; + _atomic_spin_unlock_irqrestore(ptr, flags); + return (unsigned long)prev; +} |