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| author | Olof Johansson <olof@lixom.net> | 2012-11-25 21:34:34 -0800 | 
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| committer | Olof Johansson <olof@lixom.net> | 2012-11-25 21:34:34 -0800 | 
| commit | 0f9cb211ba5db93d488fe6b154138231fdd0e22d (patch) | |
| tree | 293871b042e9ebc49b1d783f1b110eef541ddc97 /arch/mips/lib/bitops.c | |
| parent | 007108a2279123ad6639b6c653ad1a731febb60f (diff) | |
| parent | 9489e9dcae718d5fde988e4a684a0f55b5f94d17 (diff) | |
| download | olio-linux-3.10-0f9cb211ba5db93d488fe6b154138231fdd0e22d.tar.xz olio-linux-3.10-0f9cb211ba5db93d488fe6b154138231fdd0e22d.zip  | |
Merge tag 'v3.7-rc7' into next/cleanup
Merging in mainline back to next/cleanup since it has collected a few
conflicts between fixes going upstream and some of the cleanup patches.
Git doesn't auto-resolve some of them, and they're mostly noise so let's
take care of it locally.
Conflicts are in:
	arch/arm/mach-omap2/omap_hwmod_44xx_data.c
	arch/arm/plat-omap/i2c.c
	drivers/video/omap2/dss/dss.c
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/mips/lib/bitops.c')
| -rw-r--r-- | arch/mips/lib/bitops.c | 179 | 
1 files changed, 179 insertions, 0 deletions
diff --git a/arch/mips/lib/bitops.c b/arch/mips/lib/bitops.c new file mode 100644 index 00000000000..239a9c957b0 --- /dev/null +++ b/arch/mips/lib/bitops.c @@ -0,0 +1,179 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License.  See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (c) 1994-1997, 99, 2000, 06, 07 Ralf Baechle (ralf@linux-mips.org) + * Copyright (c) 1999, 2000  Silicon Graphics, Inc. + */ +#include <linux/bitops.h> +#include <linux/irqflags.h> +#include <linux/export.h> + + +/** + * __mips_set_bit - Atomically set a bit in memory.  This is called by + * set_bit() if it cannot find a faster solution. + * @nr: the bit to set + * @addr: the address to start counting from + */ +void __mips_set_bit(unsigned long nr, volatile unsigned long *addr) +{ +	volatile unsigned long *a = addr; +	unsigned bit = nr & SZLONG_MASK; +	unsigned long mask; +	unsigned long flags; + +	a += nr >> SZLONG_LOG; +	mask = 1UL << bit; +	raw_local_irq_save(flags); +	*a |= mask; +	raw_local_irq_restore(flags); +} +EXPORT_SYMBOL(__mips_set_bit); + + +/** + * __mips_clear_bit - Clears a bit in memory.  This is called by clear_bit() if + * it cannot find a faster solution. + * @nr: Bit to clear + * @addr: Address to start counting from + */ +void __mips_clear_bit(unsigned long nr, volatile unsigned long *addr) +{ +	volatile unsigned long *a = addr; +	unsigned bit = nr & SZLONG_MASK; +	unsigned long mask; +	unsigned long flags; + +	a += nr >> SZLONG_LOG; +	mask = 1UL << bit; +	raw_local_irq_save(flags); +	*a &= ~mask; +	raw_local_irq_restore(flags); +} +EXPORT_SYMBOL(__mips_clear_bit); + + +/** + * __mips_change_bit - Toggle a bit in memory.  This is called by change_bit() + * if it cannot find a faster solution. + * @nr: Bit to change + * @addr: Address to start counting from + */ +void __mips_change_bit(unsigned long nr, volatile unsigned long *addr) +{ +	volatile unsigned long *a = addr; +	unsigned bit = nr & SZLONG_MASK; +	unsigned long mask; +	unsigned long flags; + +	a += nr >> SZLONG_LOG; +	mask = 1UL << bit; +	raw_local_irq_save(flags); +	*a ^= mask; +	raw_local_irq_restore(flags); +} +EXPORT_SYMBOL(__mips_change_bit); + + +/** + * __mips_test_and_set_bit - Set a bit and return its old value.  This is + * called by test_and_set_bit() if it cannot find a faster solution. + * @nr: Bit to set + * @addr: Address to count from + */ +int __mips_test_and_set_bit(unsigned long nr, +			    volatile unsigned long *addr) +{ +	volatile unsigned long *a = addr; +	unsigned bit = nr & SZLONG_MASK; +	unsigned long mask; +	unsigned long flags; +	unsigned long res; + +	a += nr >> SZLONG_LOG; +	mask = 1UL << bit; +	raw_local_irq_save(flags); +	res = (mask & *a); +	*a |= mask; +	raw_local_irq_restore(flags); +	return res; +} +EXPORT_SYMBOL(__mips_test_and_set_bit); + + +/** + * __mips_test_and_set_bit_lock - Set a bit and return its old value.  This is + * called by test_and_set_bit_lock() if it cannot find a faster solution. + * @nr: Bit to set + * @addr: Address to count from + */ +int __mips_test_and_set_bit_lock(unsigned long nr, +				 volatile unsigned long *addr) +{ +	volatile unsigned long *a = addr; +	unsigned bit = nr & SZLONG_MASK; +	unsigned long mask; +	unsigned long flags; +	unsigned long res; + +	a += nr >> SZLONG_LOG; +	mask = 1UL << bit; +	raw_local_irq_save(flags); +	res = (mask & *a); +	*a |= mask; +	raw_local_irq_restore(flags); +	return res; +} +EXPORT_SYMBOL(__mips_test_and_set_bit_lock); + + +/** + * __mips_test_and_clear_bit - Clear a bit and return its old value.  This is + * called by test_and_clear_bit() if it cannot find a faster solution. + * @nr: Bit to clear + * @addr: Address to count from + */ +int __mips_test_and_clear_bit(unsigned long nr, volatile unsigned long *addr) +{ +	volatile unsigned long *a = addr; +	unsigned bit = nr & SZLONG_MASK; +	unsigned long mask; +	unsigned long flags; +	unsigned long res; + +	a += nr >> SZLONG_LOG; +	mask = 1UL << bit; +	raw_local_irq_save(flags); +	res = (mask & *a); +	*a &= ~mask; +	raw_local_irq_restore(flags); +	return res; +} +EXPORT_SYMBOL(__mips_test_and_clear_bit); + + +/** + * __mips_test_and_change_bit - Change a bit and return its old value.  This is + * called by test_and_change_bit() if it cannot find a faster solution. + * @nr: Bit to change + * @addr: Address to count from + */ +int __mips_test_and_change_bit(unsigned long nr, volatile unsigned long *addr) +{ +	volatile unsigned long *a = addr; +	unsigned bit = nr & SZLONG_MASK; +	unsigned long mask; +	unsigned long flags; +	unsigned long res; + +	a += nr >> SZLONG_LOG; +	mask = 1UL << bit; +	raw_local_irq_save(flags); +	res = (mask & *a); +	*a ^= mask; +	raw_local_irq_restore(flags); +	return res; +} +EXPORT_SYMBOL(__mips_test_and_change_bit);  |