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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/unicore32/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/unicore32/include/asm/bitops.h')
-rw-r--r-- | kernel/arch/unicore32/include/asm/bitops.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/kernel/arch/unicore32/include/asm/bitops.h b/kernel/arch/unicore32/include/asm/bitops.h new file mode 100644 index 000000000..401f597bc --- /dev/null +++ b/kernel/arch/unicore32/include/asm/bitops.h @@ -0,0 +1,47 @@ +/* + * linux/arch/unicore32/include/asm/bitops.h + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __UNICORE_BITOPS_H__ +#define __UNICORE_BITOPS_H__ + +#define _ASM_GENERIC_BITOPS_FLS_H_ +#define _ASM_GENERIC_BITOPS___FLS_H_ +#define _ASM_GENERIC_BITOPS_FFS_H_ +#define _ASM_GENERIC_BITOPS___FFS_H_ +/* + * On UNICORE, those functions can be implemented around + * the cntlz instruction for much better code efficiency. + */ + +static inline int fls(int x) +{ + int ret; + + asm("cntlz\t%0, %1" : "=r" (ret) : "r" (x) : "cc"); + ret = 32 - ret; + + return ret; +} + +#define __fls(x) (fls(x) - 1) +#define ffs(x) ({ unsigned long __t = (x); fls(__t & -__t); }) +#define __ffs(x) (ffs(x) - 1) + +#include <asm-generic/bitops.h> + +/* following definitions: to avoid using codes in lib/find_*.c */ +#define find_next_bit find_next_bit +#define find_next_zero_bit find_next_zero_bit +#define find_first_bit find_first_bit +#define find_first_zero_bit find_first_zero_bit + +#endif /* __UNICORE_BITOPS_H__ */ |