summaryrefslogtreecommitdiffstats
path: root/include/asm-x86/sync_bitops.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-x86/sync_bitops.h')
-rw-r--r--include/asm-x86/sync_bitops.h130
1 files changed, 0 insertions, 130 deletions
diff --git a/include/asm-x86/sync_bitops.h b/include/asm-x86/sync_bitops.h
deleted file mode 100644
index b689bee..0000000
--- a/include/asm-x86/sync_bitops.h
+++ /dev/null
@@ -1,130 +0,0 @@
-#ifndef ASM_X86__SYNC_BITOPS_H
-#define ASM_X86__SYNC_BITOPS_H
-
-/*
- * Copyright 1992, Linus Torvalds.
- */
-
-/*
- * These have to be done with inline assembly: that way the bit-setting
- * is guaranteed to be atomic. All bit operations return 0 if the bit
- * was cleared before the operation and != 0 if it was not.
- *
- * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
- */
-
-#define ADDR (*(volatile long *)addr)
-
-/**
- * sync_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.
- */
-static inline void sync_set_bit(int nr, volatile unsigned long *addr)
-{
- asm volatile("lock; btsl %1,%0"
- : "+m" (ADDR)
- : "Ir" (nr)
- : "memory");
-}
-
-/**
- * sync_clear_bit - Clears a bit in memory
- * @nr: Bit to clear
- * @addr: Address to start counting from
- *
- * sync_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_clear_bit() and/or smp_mb__after_clear_bit()
- * in order to ensure changes are visible on other processors.
- */
-static inline void sync_clear_bit(int nr, volatile unsigned long *addr)
-{
- asm volatile("lock; btrl %1,%0"
- : "+m" (ADDR)
- : "Ir" (nr)
- : "memory");
-}
-
-/**
- * sync_change_bit - Toggle a bit in memory
- * @nr: Bit to change
- * @addr: Address to start counting from
- *
- * sync_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.
- */
-static inline void sync_change_bit(int nr, volatile unsigned long *addr)
-{
- asm volatile("lock; btcl %1,%0"
- : "+m" (ADDR)
- : "Ir" (nr)
- : "memory");
-}
-
-/**
- * sync_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 sync_test_and_set_bit(int nr, volatile unsigned long *addr)
-{
- int oldbit;
-
- asm volatile("lock; btsl %2,%1\n\tsbbl %0,%0"
- : "=r" (oldbit), "+m" (ADDR)
- : "Ir" (nr) : "memory");
- return oldbit;
-}
-
-/**
- * sync_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 sync_test_and_clear_bit(int nr, volatile unsigned long *addr)
-{
- int oldbit;
-
- asm volatile("lock; btrl %2,%1\n\tsbbl %0,%0"
- : "=r" (oldbit), "+m" (ADDR)
- : "Ir" (nr) : "memory");
- return oldbit;
-}
-
-/**
- * sync_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 sync_test_and_change_bit(int nr, volatile unsigned long *addr)
-{
- int oldbit;
-
- asm volatile("lock; btcl %2,%1\n\tsbbl %0,%0"
- : "=r" (oldbit), "+m" (ADDR)
- : "Ir" (nr) : "memory");
- return oldbit;
-}
-
-#define sync_test_bit(nr, addr) test_bit(nr, addr)
-
-#undef ADDR
-
-#endif /* ASM_X86__SYNC_BITOPS_H */
OpenPOWER on IntegriCloud