diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-24 09:55:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-24 09:55:18 -0700 |
| commit | ff0c4ad2c3a75ccfe6adca916e50804eb45bb2d9 (patch) | |
| tree | 574f2d38793f7a08af73c40a96d6dc76af9c6f46 /arch/openrisc/include/asm/bitops/__ffs.h | |
| parent | fcda12e7f6d58d61997681a9d41779e3fd2ffc94 (diff) | |
| parent | 19f9d392365113f74286b1721c7c032c12cf5abd (diff) | |
Merge branch 'for-upstream' of git://openrisc.net/jonas/linux
* 'for-upstream' of git://openrisc.net/jonas/linux: (24 commits)
OpenRISC: Add MAINTAINERS entry
OpenRISC: Miscellaneous
OpenRISC: Library routines
OpenRISC: Headers
OpenRISC: Traps
OpenRISC: Module support
OpenRISC: GPIO
OpenRISC: Scheduling/Process management
OpenRISC: Idle/Power management
OpenRISC: System calls
OpenRISC: IRQ
OpenRISC: Timekeeping
OpenRISC: DMA
OpenRISC: PTrace
OpenRISC: Build infrastructure
OpenRISC: Signal handling
OpenRISC: Memory management
OpenRISC: Device tree
OpenRISC: Boot code
iomap: make IOPORT/PCI mapping functions conditional
...
Diffstat (limited to 'arch/openrisc/include/asm/bitops/__ffs.h')
| -rw-r--r-- | arch/openrisc/include/asm/bitops/__ffs.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/openrisc/include/asm/bitops/__ffs.h b/arch/openrisc/include/asm/bitops/__ffs.h new file mode 100644 index 000000000000..6c8368a34059 --- /dev/null +++ b/arch/openrisc/include/asm/bitops/__ffs.h @@ -0,0 +1,33 @@ +/* + * OpenRISC Linux + * + * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __ASM_OPENRISC___FFS_H +#define __ASM_OPENRISC___FFS_H + + +#ifdef CONFIG_OPENRISC_HAVE_INST_FF1 + +static inline unsigned long __ffs(unsigned long x) +{ + int ret; + + __asm__ ("l.ff1 %0,%1" + : "=r" (ret) + : "r" (x)); + + return ret-1; +} + +#else +#include <asm-generic/bitops/__ffs.h> +#endif + +#endif /* __ASM_OPENRISC___FFS_H */ |