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CRIS: use generic atomic bitops
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The generic atomic bitops are the same as the CRIS-specific ones.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jespern@axis.com>
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Rabin Vincent authored and Jesper Nilsson committed Mar 25, 2015
1 parent 3c2165f commit f647511
Showing 1 changed file with 1 addition and 110 deletions.
111 changes: 1 addition & 110 deletions arch/cris/include/asm/bitops.h
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#endif

#include <arch/bitops.h>
#include <linux/atomic.h>
#include <linux/compiler.h>
#include <asm/barrier.h>

/*
* set_bit - Atomically set a bit in memory
* @nr: the bit to set
* @addr: the address to start counting from
*
* This function is atomic and may not be reordered. See __set_bit()
* if you do not require the atomic guarantees.
* Note that @nr may be almost arbitrarily large; this function is not
* restricted to acting on a single-word quantity.
*/

#define set_bit(nr, addr) (void)test_and_set_bit(nr, addr)

/*
* clear_bit - Clears a bit in memory
* @nr: Bit to clear
* @addr: Address to start counting from
*
* clear_bit() is atomic and may not be reordered. However, it does
* not contain a memory barrier, so if it is used for locking purposes,
* you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
* in order to ensure changes are visible on other processors.
*/

#define clear_bit(nr, addr) (void)test_and_clear_bit(nr, addr)

/*
* change_bit - Toggle a bit in memory
* @nr: Bit to change
* @addr: Address to start counting from
*
* change_bit() is atomic and may not be reordered.
* Note that @nr may be almost arbitrarily large; this function is not
* restricted to acting on a single-word quantity.
*/

#define change_bit(nr, addr) (void)test_and_change_bit(nr, addr)

/**
* test_and_set_bit - Set a bit and return its old value
* @nr: Bit to set
* @addr: Address to count from
*
* This operation is atomic and cannot be reordered.
* It also implies a memory barrier.
*/

static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
{
unsigned int mask, retval;
unsigned long flags;
unsigned int *adr = (unsigned int *)addr;

adr += nr >> 5;
mask = 1 << (nr & 0x1f);
cris_atomic_save(addr, flags);
retval = (mask & *adr) != 0;
*adr |= mask;
cris_atomic_restore(addr, flags);
return retval;
}

/**
* test_and_clear_bit - Clear a bit and return its old value
* @nr: Bit to clear
* @addr: Address to count from
*
* This operation is atomic and cannot be reordered.
* It also implies a memory barrier.
*/

static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
{
unsigned int mask, retval;
unsigned long flags;
unsigned int *adr = (unsigned int *)addr;

adr += nr >> 5;
mask = 1 << (nr & 0x1f);
cris_atomic_save(addr, flags);
retval = (mask & *adr) != 0;
*adr &= ~mask;
cris_atomic_restore(addr, flags);
return retval;
}

/**
* test_and_change_bit - Change a bit and return its old value
* @nr: Bit to change
* @addr: Address to count from
*
* This operation is atomic and cannot be reordered.
* It also implies a memory barrier.
*/

static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
{
unsigned int mask, retval;
unsigned long flags;
unsigned int *adr = (unsigned int *)addr;
adr += nr >> 5;
mask = 1 << (nr & 0x1f);
cris_atomic_save(addr, flags);
retval = (mask & *adr) != 0;
*adr ^= mask;
cris_atomic_restore(addr, flags);
return retval;
}

#include <asm-generic/bitops/atomic.h>
#include <asm-generic/bitops/non-atomic.h>

/*
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