diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/metag/include/asm/bitops.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/metag/include/asm/bitops.h')
-rw-r--r-- | kernel/arch/metag/include/asm/bitops.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/kernel/arch/metag/include/asm/bitops.h b/kernel/arch/metag/include/asm/bitops.h new file mode 100644 index 000000000..2671134ee --- /dev/null +++ b/kernel/arch/metag/include/asm/bitops.h @@ -0,0 +1,126 @@ +#ifndef __ASM_METAG_BITOPS_H +#define __ASM_METAG_BITOPS_H + +#include <linux/compiler.h> +#include <asm/barrier.h> +#include <asm/global_lock.h> + +#ifdef CONFIG_SMP +/* + * These functions are the basis of our bit ops. + */ +static inline void set_bit(unsigned int bit, volatile unsigned long *p) +{ + unsigned long flags; + unsigned long mask = 1UL << (bit & 31); + + p += bit >> 5; + + __global_lock1(flags); + fence(); + *p |= mask; + __global_unlock1(flags); +} + +static inline void clear_bit(unsigned int bit, volatile unsigned long *p) +{ + unsigned long flags; + unsigned long mask = 1UL << (bit & 31); + + p += bit >> 5; + + __global_lock1(flags); + fence(); + *p &= ~mask; + __global_unlock1(flags); +} + +static inline void change_bit(unsigned int bit, volatile unsigned long *p) +{ + unsigned long flags; + unsigned long mask = 1UL << (bit & 31); + + p += bit >> 5; + + __global_lock1(flags); + fence(); + *p ^= mask; + __global_unlock1(flags); +} + +static inline int test_and_set_bit(unsigned int bit, volatile unsigned long *p) +{ + unsigned long flags; + unsigned long old; + unsigned long mask = 1UL << (bit & 31); + + p += bit >> 5; + + __global_lock1(flags); + old = *p; + if (!(old & mask)) { + fence(); + *p = old | mask; + } + __global_unlock1(flags); + + return (old & mask) != 0; +} + +static inline int test_and_clear_bit(unsigned int bit, + volatile unsigned long *p) +{ + unsigned long flags; + unsigned long old; + unsigned long mask = 1UL << (bit & 31); + + p += bit >> 5; + + __global_lock1(flags); + old = *p; + if (old & mask) { + fence(); + *p = old & ~mask; + } + __global_unlock1(flags); + + return (old & mask) != 0; +} + +static inline int test_and_change_bit(unsigned int bit, + volatile unsigned long *p) +{ + unsigned long flags; + unsigned long old; + unsigned long mask = 1UL << (bit & 31); + + p += bit >> 5; + + __global_lock1(flags); + fence(); + old = *p; + *p = old ^ mask; + __global_unlock1(flags); + + return (old & mask) != 0; +} + +#else +#include <asm-generic/bitops/atomic.h> +#endif /* CONFIG_SMP */ + +#include <asm-generic/bitops/non-atomic.h> +#include <asm-generic/bitops/find.h> +#include <asm-generic/bitops/ffs.h> +#include <asm-generic/bitops/__ffs.h> +#include <asm-generic/bitops/ffz.h> +#include <asm-generic/bitops/fls.h> +#include <asm-generic/bitops/__fls.h> +#include <asm-generic/bitops/fls64.h> +#include <asm-generic/bitops/hweight.h> +#include <asm-generic/bitops/lock.h> +#include <asm-generic/bitops/sched.h> +#include <asm-generic/bitops/le.h> +#include <asm-generic/bitops/ext2-atomic.h> + +#endif /* __ASM_METAG_BITOPS_H */ |