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Date: Thu, 19 Feb 2015 20:29:53 +0100
From: Rabin Vincent <rabin@....in>
To: jesper.nilsson@...s.com
Cc: linux-cris-kernel@...s.com, linux-kernel@...r.kernel.org,
Rabin Vincent <rabin@....in>
Subject: [PATCH 3/6] CRIS: use generic atomic bitops
The generic atomic bitops are the same as the CRIS-specific ones.
Signed-off-by: Rabin Vincent <rabin@....in>
---
arch/cris/include/asm/bitops.h | 111 +----------------------------------------
1 file changed, 1 insertion(+), 110 deletions(-)
diff --git a/arch/cris/include/asm/bitops.h b/arch/cris/include/asm/bitops.h
index bd49a54..8062cb5 100644
--- a/arch/cris/include/asm/bitops.h
+++ b/arch/cris/include/asm/bitops.h
@@ -19,119 +19,10 @@
#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>
/*
--
2.1.4
--
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