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Commit 373f1583 authored by Keith M. Wesolowski's avatar Keith M. Wesolowski
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[SPARC32]: Take parisc atomic_t implementation so they are full 32-bits.

parent a394cc86
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Showing with 139 additions and 108 deletions
arch/sparc/kernel/semaphore.c
View file @ 373f1583
......@@ -61,7 +61,7 @@ void __down(struct semaphore * sem)
* Add "everybody else" into it. They aren't
* playing, because we own the spinlock.
*/
if (!atomic_add_negative(sleepers - 1, &sem->count)) {
if (!atomic24_add_negative(sleepers - 1, &sem->count)) {
sem->sleepers = 0;
break;
}
......@@ -101,7 +101,7 @@ int __down_interruptible(struct semaphore * sem)
if (signal_pending(current)) {
retval = -EINTR;
sem->sleepers = 0;
atomic_add(sleepers, &sem->count);
atomic24_add(sleepers, &sem->count);
break;
}
......@@ -111,7 +111,7 @@ int __down_interruptible(struct semaphore * sem)
* "-1" is because we're still hoping to get
* the lock.
*/
if (!atomic_add_negative(sleepers - 1, &sem->count)) {
if (!atomic24_add_negative(sleepers - 1, &sem->count)) {
sem->sleepers = 0;
break;
}
......@@ -146,7 +146,7 @@ int __down_trylock(struct semaphore * sem)
* Add "everybody else" and us into it. They aren't
* playing, because we own the spinlock.
*/
if (!atomic_add_negative(sleepers, &sem->count))
if (!atomic24_add_negative(sleepers, &sem->count))
wake_up(&sem->wait);
spin_unlock_irqrestore(&semaphore_lock, flags);
......
arch/sparc/kernel/smp.c
View file @ 373f1583
......@@ -56,6 +56,9 @@ int smp_activated = 0;
volatile int __cpu_number_map[NR_CPUS];
volatile int __cpu_logical_map[NR_CPUS];
cycles_t cacheflush_time = 0; /* XXX */
spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] = {
[0 ... (ATOMIC_HASH_SIZE-1)] = SPIN_LOCK_UNLOCKED
};
/* The only guaranteed locking primitive available on all Sparc
* processors is 'ldstub [%reg + immediate], %dest_reg' which atomically
......
arch/sparc/kernel/sparc_ksyms.c
View file @ 373f1583
......@@ -86,8 +86,8 @@ extern int __divdi3(int, int);
extern void dump_thread(struct pt_regs *, struct user *);
/* Private functions with odd calling conventions. */
extern void ___atomic_add(void);
extern void ___atomic_sub(void);
extern void ___atomic24_add(void);
extern void ___atomic24_sub(void);
extern void ___set_bit(void);
extern void ___clear_bit(void);
extern void ___change_bit(void);
......@@ -147,8 +147,8 @@ EXPORT_SYMBOL(sparc_valid_addr_bitmap);
EXPORT_SYMBOL(phys_base);
/* Atomic operations. */
EXPORT_SYMBOL(___atomic_add);
EXPORT_SYMBOL(___atomic_sub);
EXPORT_SYMBOL(___atomic24_add);
EXPORT_SYMBOL(___atomic24_sub);
/* Bit operations. */
EXPORT_SYMBOL(___set_bit);
......
arch/sparc/lib/atomic.S
View file @ 373f1583
......@@ -45,8 +45,8 @@ ___xchg32_sun4md:
/* Read asm-sparc/atomic.h carefully to understand how this works for SMP.
* Really, some things here for SMP are overly clever, go read the header.
*/
.globl ___atomic_add
___atomic_add:
.globl ___atomic24_add
___atomic24_add:
rd %psr, %g3 ! Keep the code small, old way was stupid
nop; nop; nop; ! Let the bits set
or %g3, PSR_PIL, %g7 ! Disable interrupts
......@@ -56,13 +56,13 @@ ___atomic_add:
1: ldstub [%g1 + 3], %g7 ! Spin on the byte lock for SMP.
orcc %g7, 0x0, %g0 ! Did we get it?
bne 1b ! Nope...
ld [%g1], %g7 ! Load locked atomic_t
ld [%g1], %g7 ! Load locked atomic24_t
sra %g7, 8, %g7 ! Get signed 24-bit integer
add %g7, %g2, %g2 ! Add in argument
sll %g2, 8, %g7 ! Transpose back to atomic_t
sll %g2, 8, %g7 ! Transpose back to atomic24_t
st %g7, [%g1] ! Clever: This releases the lock as well.
#else
ld [%g1], %g7 ! Load locked atomic_t
ld [%g1], %g7 ! Load locked atomic24_t
add %g7, %g2, %g2 ! Add in argument
st %g2, [%g1] ! Store it back
#endif
......@@ -71,8 +71,8 @@ ___atomic_add:
jmpl %o7, %g0 ! NOTE: not + 8, see callers in atomic.h
mov %g4, %o7 ! Restore %o7
.globl ___atomic_sub
___atomic_sub:
.globl ___atomic24_sub
___atomic24_sub:
rd %psr, %g3 ! Keep the code small, old way was stupid
nop; nop; nop; ! Let the bits set
or %g3, PSR_PIL, %g7 ! Disable interrupts
......@@ -82,13 +82,13 @@ ___atomic_sub:
1: ldstub [%g1 + 3], %g7 ! Spin on the byte lock for SMP.
orcc %g7, 0x0, %g0 ! Did we get it?
bne 1b ! Nope...
ld [%g1], %g7 ! Load locked atomic_t
ld [%g1], %g7 ! Load locked atomic24_t
sra %g7, 8, %g7 ! Get signed 24-bit integer
sub %g7, %g2, %g2 ! Subtract argument
sll %g2, 8, %g7 ! Transpose back to atomic_t
sll %g2, 8, %g7 ! Transpose back to atomic24_t
st %g7, [%g1] ! Clever: This releases the lock as well
#else
ld [%g1], %g7 ! Load locked atomic_t
ld [%g1], %g7 ! Load locked atomic24_t
sub %g7, %g2, %g2 ! Subtract argument
st %g2, [%g1] ! Store it back
#endif
......
include/asm-generic/local.h
View file @ 373f1583
......@@ -9,7 +9,7 @@
/* An unsigned long type for operations which are atomic for a single
* CPU. Usually used in combination with per-cpu variables. */
#if BITS_PER_LONG == 32 && !defined(CONFIG_SPARC32)
#if BITS_PER_LONG == 32
/* Implement in terms of atomics. */
/* Don't use typedef: don't want them to be mixed with atomic_t's. */
......
include/asm-i386/atomic.h
View file @ 373f1583
......@@ -27,8 +27,7 @@ typedef struct { volatile int counter; } atomic_t;
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
* Atomically reads the value of @v. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically reads the value of @v.
*/
#define atomic_read(v) ((v)->counter)
......@@ -37,8 +36,7 @@ typedef struct { volatile int counter; } atomic_t;
* @v: pointer of type atomic_t
* @i: required value
*
* Atomically sets the value of @v to @i. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically sets the value of @v to @i.
*/
#define atomic_set(v,i) (((v)->counter) = (i))
......@@ -47,8 +45,7 @@ typedef struct { volatile int counter; } atomic_t;
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v. Note that the guaranteed useful range
* of an atomic_t is only 24 bits.
* Atomically adds @i to @v.
*/
static __inline__ void atomic_add(int i, atomic_t *v)
{
......@@ -63,8 +60,7 @@ static __inline__ void atomic_add(int i, atomic_t *v)
* @i: integer value to subtract
* @v: pointer of type atomic_t
*
* Atomically subtracts @i from @v. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically subtracts @i from @v.
*/
static __inline__ void atomic_sub(int i, atomic_t *v)
{
......@@ -81,8 +77,7 @@ static __inline__ void atomic_sub(int i, atomic_t *v)
*
* Atomically subtracts @i from @v and returns
* true if the result is zero, or false for all
* other cases. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* other cases.
*/
static __inline__ int atomic_sub_and_test(int i, atomic_t *v)
{
......@@ -99,8 +94,7 @@ static __inline__ int atomic_sub_and_test(int i, atomic_t *v)
* atomic_inc - increment atomic variable
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically increments @v by 1.
*/
static __inline__ void atomic_inc(atomic_t *v)
{
......@@ -114,8 +108,7 @@ static __inline__ void atomic_inc(atomic_t *v)
* atomic_dec - decrement atomic variable
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically decrements @v by 1.
*/
static __inline__ void atomic_dec(atomic_t *v)
{
......@@ -131,8 +124,7 @@ static __inline__ void atomic_dec(atomic_t *v)
*
* Atomically decrements @v by 1 and
* returns true if the result is 0, or false for all other
* cases. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* cases.
*/
static __inline__ int atomic_dec_and_test(atomic_t *v)
{
......@@ -151,8 +143,7 @@ static __inline__ int atomic_dec_and_test(atomic_t *v)
*
* Atomically increments @v by 1
* and returns true if the result is zero, or false for all
* other cases. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* other cases.
*/
static __inline__ int atomic_inc_and_test(atomic_t *v)
{
......@@ -172,8 +163,7 @@ static __inline__ int atomic_inc_and_test(atomic_t *v)
*
* Atomically adds @i to @v and returns true
* if the result is negative, or false when
* result is greater than or equal to zero. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* result is greater than or equal to zero.
*/
static __inline__ int atomic_add_negative(int i, atomic_t *v)
{
......
include/asm-mips/atomic.h
View file @ 373f1583
......@@ -29,8 +29,7 @@ typedef struct { volatile __s64 counter; } atomic64_t;
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
* Atomically reads the value of @v. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically reads the value of @v.
*/
#define atomic_read(v) ((v)->counter)
......@@ -46,8 +45,7 @@ typedef struct { volatile __s64 counter; } atomic64_t;
* @v: pointer of type atomic_t
* @i: required value
*
* Atomically sets the value of @v to @i. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically sets the value of @v to @i.
*/
#define atomic_set(v,i) ((v)->counter = (i))
......@@ -68,8 +66,7 @@ typedef struct { volatile __s64 counter; } atomic64_t;
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v. Note that the guaranteed useful range
* of an atomic_t is only 24 bits.
* Atomically adds @i to @v.
*/
static __inline__ void atomic_add(int i, atomic_t * v)
{
......@@ -85,8 +82,7 @@ static __inline__ void atomic_add(int i, atomic_t * v)
* @i: integer value to subtract
* @v: pointer of type atomic_t
*
* Atomically subtracts @i from @v. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically subtracts @i from @v.
*/
static __inline__ void atomic_sub(int i, atomic_t * v)
{
......@@ -137,8 +133,7 @@ static __inline__ int atomic_sub_return(int i, atomic_t * v)
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v. Note that the guaranteed useful range
* of an atomic_t is only 24 bits.
* Atomically adds @i to @v.
*/
static __inline__ void atomic_add(int i, atomic_t * v)
{
......@@ -158,8 +153,7 @@ static __inline__ void atomic_add(int i, atomic_t * v)
* @i: integer value to subtract
* @v: pointer of type atomic_t
*
* Atomically subtracts @i from @v. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically subtracts @i from @v.
*/
static __inline__ void atomic_sub(int i, atomic_t * v)
{
......@@ -390,8 +384,7 @@ static __inline__ int atomic64_sub_return(int i, atomic64_t * v)
*
* Atomically subtracts @i from @v and returns
* true if the result is zero, or false for all
* other cases. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* other cases.
*/
#define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0)
......@@ -412,8 +405,7 @@ static __inline__ int atomic64_sub_return(int i, atomic64_t * v)
*
* Atomically increments @v by 1
* and returns true if the result is zero, or false for all
* other cases. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* other cases.
*/
#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
......@@ -433,8 +425,7 @@ static __inline__ int atomic64_sub_return(int i, atomic64_t * v)
*
* Atomically decrements @v by 1 and
* returns true if the result is 0, or false for all other
* cases. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* cases.
*/
#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
......@@ -452,8 +443,7 @@ static __inline__ int atomic64_sub_return(int i, atomic64_t * v)
* atomic_inc - increment atomic variable
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically increments @v by 1.
*/
#define atomic_inc(v) atomic_add(1,(v))
......@@ -469,8 +459,7 @@ static __inline__ int atomic64_sub_return(int i, atomic64_t * v)
* atomic_dec - decrement and test
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically decrements @v by 1.
*/
#define atomic_dec(v) atomic_sub(1,(v))
......@@ -489,8 +478,7 @@ static __inline__ int atomic64_sub_return(int i, atomic64_t * v)
*
* Atomically adds @i to @v and returns true
* if the result is negative, or false when
* result is greater than or equal to zero. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* result is greater than or equal to zero.
*/
#define atomic_add_negative(i,v) (atomic_add_return(i, (v)) < 0)
......
include/asm-sparc/atomic.h
View file @ 373f1583
......@@ -2,21 +2,82 @@
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 2000 Anton Blanchard (anton@linuxcare.com.au)
*
* Additions by Keith M Wesolowski (wesolows@foobazco.org) based
* on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>.
*/
#ifndef __ARCH_SPARC_ATOMIC__
#define __ARCH_SPARC_ATOMIC__
#include <linux/config.h>
#include <linux/spinlock.h>
typedef struct { volatile int counter; } atomic_t;
#ifdef __KERNEL__
#ifndef CONFIG_SMP
#ifdef CONFIG_SMP
#define ATOMIC_HASH_SIZE 4
#define ATOMIC_HASH(a) (&__atomic_hash[(((unsigned long)a)>>8) & (ATOMIC_HASH_SIZE-1)])
extern spinlock_t __atomic_hash[ATOMIC_HASH_SIZE];
#else /* SMP */
#define ATOMIC_HASH_SIZE 1
#define ATOMIC_HASH(a) 0
#endif /* SMP */
static inline int __atomic_add_return(int i, atomic_t *v)
{
int ret;
unsigned long flags;
spin_lock_irqsave(ATOMIC_HASH(v), flags);
ret = (v->counter += i);
spin_unlock_irqrestore(ATOMIC_HASH(v), flags);
return ret;
}
static inline void atomic_set(atomic_t *v, int i)
{
unsigned long flags;
spin_lock_irqsave(ATOMIC_HASH(v), flags);
v->counter = i;
spin_unlock_irqrestore(ATOMIC_HASH(v), flags);
}
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
#define atomic_set(v, i) (((v)->counter) = i)
#define atomic_add(i, v) ((void)__atomic_add_return( (int)(i), (v)))
#define atomic_sub(i, v) ((void)__atomic_add_return(-(int)(i), (v)))
#define atomic_inc(v) ((void)__atomic_add_return( 1, (v)))
#define atomic_dec(v) ((void)__atomic_add_return( -1, (v)))
#define atomic_add_return(i, v) (__atomic_add_return( (int)(i), (v)))
#define atomic_sub_return(i, v) (__atomic_add_return(-(int)(i), (v)))
#define atomic_inc_return(v) (__atomic_add_return( 1, (v)))
#define atomic_dec_return(v) (__atomic_add_return( -1, (v)))
#define atomic_dec_and_test(v) (atomic_dec_return(v) == 0)
/* This is the old 24-bit implementation. It's still used internally
* by some sparc-specific code, notably the semaphore implementation.
*/
typedef struct { volatile int counter; } atomic24_t;
#ifndef CONFIG_SMP
#define ATOMIC24_INIT(i) { (i) }
#define atomic24_read(v) ((v)->counter)
#define atomic24_set(v, i) (((v)->counter) = i)
#else
/* We do the bulk of the actual work out of line in two common
......@@ -33,9 +94,9 @@ typedef struct { volatile int counter; } atomic_t;
* 31 8 7 0
*/
#define ATOMIC_INIT(i) { ((i) << 8) }
#define ATOMIC24_INIT(i) { ((i) << 8) }
static __inline__ int atomic_read(const atomic_t *v)
static inline int atomic24_read(const atomic24_t *v)
{
int ret = v->counter;
......@@ -45,10 +106,10 @@ static __inline__ int atomic_read(const atomic_t *v)
return ret >> 8;
}
#define atomic_set(v, i) (((v)->counter) = ((i) << 8))
#define atomic24_set(v, i) (((v)->counter) = ((i) << 8))
#endif
static inline int __atomic_add(int i, atomic_t *v)
static inline int __atomic24_add(int i, atomic24_t *v)
{
register volatile int *ptr asm("g1");
register int increment asm("g2");
......@@ -61,7 +122,7 @@ static inline int __atomic_add(int i, atomic_t *v)
__asm__ __volatile__(
"mov %%o7, %%g4\n\t"
"call ___atomic_add\n\t"
"call ___atomic24_add\n\t"
" add %%o7, 8, %%o7\n"
: "=&r" (increment), "=r" (tmp1), "=r" (tmp2), "=r" (tmp3)
: "0" (increment), "r" (ptr)
......@@ -70,7 +131,7 @@ static inline int __atomic_add(int i, atomic_t *v)
return increment;
}
static inline int __atomic_sub(int i, atomic_t *v)
static inline int __atomic24_sub(int i, atomic24_t *v)
{
register volatile int *ptr asm("g1");
register int increment asm("g2");
......@@ -83,7 +144,7 @@ static inline int __atomic_sub(int i, atomic_t *v)
__asm__ __volatile__(
"mov %%o7, %%g4\n\t"
"call ___atomic_sub\n\t"
"call ___atomic24_sub\n\t"
" add %%o7, 8, %%o7\n"
: "=&r" (increment), "=r" (tmp1), "=r" (tmp2), "=r" (tmp3)
: "0" (increment), "r" (ptr)
......@@ -92,19 +153,19 @@ static inline int __atomic_sub(int i, atomic_t *v)
return increment;
}
#define atomic_add(i, v) ((void)__atomic_add((i), (v)))
#define atomic_sub(i, v) ((void)__atomic_sub((i), (v)))
#define atomic24_add(i, v) ((void)__atomic24_add((i), (v)))
#define atomic24_sub(i, v) ((void)__atomic24_sub((i), (v)))
#define atomic_dec_return(v) __atomic_sub(1, (v))
#define atomic_inc_return(v) __atomic_add(1, (v))
#define atomic24_dec_return(v) __atomic24_sub(1, (v))
#define atomic24_inc_return(v) __atomic24_add(1, (v))
#define atomic_sub_and_test(i, v) (__atomic_sub((i), (v)) == 0)
#define atomic_dec_and_test(v) (__atomic_sub(1, (v)) == 0)
#define atomic24_sub_and_test(i, v) (__atomic24_sub((i), (v)) == 0)
#define atomic24_dec_and_test(v) (__atomic24_sub(1, (v)) == 0)
#define atomic_inc(v) ((void)__atomic_add(1, (v)))
#define atomic_dec(v) ((void)__atomic_sub(1, (v)))
#define atomic24_inc(v) ((void)__atomic24_add(1, (v)))
#define atomic24_dec(v) ((void)__atomic24_sub(1, (v)))
#define atomic_add_negative(i, v) (__atomic_add((i), (v)) < 0)
#define atomic24_add_negative(i, v) (__atomic24_add((i), (v)) < 0)
/* Atomic operations are already serializing */
#define smp_mb__before_atomic_dec() barrier()
......
include/asm-sparc/processor.h
View file @ 373f1583
......@@ -22,7 +22,6 @@
#include <asm/segment.h>
#include <asm/btfixup.h>
#include <asm/page.h>
#include <asm/atomic.h>
/*
* Bus types
......
include/asm-sparc/semaphore.h
View file @ 373f1583
......@@ -10,7 +10,7 @@
#include <linux/rwsem.h>
struct semaphore {
atomic_t count;
atomic24_t count;
int sleepers;
wait_queue_head_t wait;
#if WAITQUEUE_DEBUG
......@@ -40,7 +40,7 @@ struct semaphore {
static inline void sema_init (struct semaphore *sem, int val)
{
atomic_set(&sem->count, val);
atomic24_set(&sem->count, val);
sem->sleepers = 0;
init_waitqueue_head(&sem->wait);
#if WAITQUEUE_DEBUG
......@@ -78,7 +78,7 @@ static inline void down(struct semaphore * sem)
__asm__ __volatile__(
"mov %%o7, %%g4\n\t"
"call ___atomic_sub\n\t"
"call ___atomic24_sub\n\t"
" add %%o7, 8, %%o7\n\t"
"tst %%g2\n\t"
"bl 2f\n\t"
......@@ -115,7 +115,7 @@ static inline int down_interruptible(struct semaphore * sem)
__asm__ __volatile__(
"mov %%o7, %%g4\n\t"
"call ___atomic_sub\n\t"
"call ___atomic24_sub\n\t"
" add %%o7, 8, %%o7\n\t"
"tst %%g2\n\t"
"bl 2f\n\t"
......@@ -154,7 +154,7 @@ static inline int down_trylock(struct semaphore * sem)
__asm__ __volatile__(
"mov %%o7, %%g4\n\t"
"call ___atomic_sub\n\t"
"call ___atomic24_sub\n\t"
" add %%o7, 8, %%o7\n\t"
"tst %%g2\n\t"
"bl 2f\n\t"
......@@ -193,7 +193,7 @@ static inline void up(struct semaphore * sem)
__asm__ __volatile__(
"mov %%o7, %%g4\n\t"
"call ___atomic_add\n\t"
"call ___atomic24_add\n\t"
" add %%o7, 8, %%o7\n\t"
"tst %%g2\n\t"
"ble 2f\n\t"
......
include/asm-x86_64/atomic.h
View file @ 373f1583
......@@ -29,8 +29,7 @@ typedef struct { volatile int counter; } atomic_t;
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
* Atomically reads the value of @v. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically reads the value of @v.
*/
#define atomic_read(v) ((v)->counter)
......@@ -39,8 +38,7 @@ typedef struct { volatile int counter; } atomic_t;
* @v: pointer of type atomic_t
* @i: required value
*
* Atomically sets the value of @v to @i. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically sets the value of @v to @i.
*/
#define atomic_set(v,i) (((v)->counter) = (i))
......@@ -49,8 +47,7 @@ typedef struct { volatile int counter; } atomic_t;
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v. Note that the guaranteed useful range
* of an atomic_t is only 24 bits.
* Atomically adds @i to @v.
*/
static __inline__ void atomic_add(int i, atomic_t *v)
{
......@@ -65,8 +62,7 @@ static __inline__ void atomic_add(int i, atomic_t *v)
* @i: integer value to subtract
* @v: pointer of type atomic_t
*
* Atomically subtracts @i from @v. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically subtracts @i from @v.
*/
static __inline__ void atomic_sub(int i, atomic_t *v)
{
......@@ -83,8 +79,7 @@ static __inline__ void atomic_sub(int i, atomic_t *v)
*
* Atomically subtracts @i from @v and returns
* true if the result is zero, or false for all
* other cases. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* other cases.
*/
static __inline__ int atomic_sub_and_test(int i, atomic_t *v)
{
......@@ -101,8 +96,7 @@ static __inline__ int atomic_sub_and_test(int i, atomic_t *v)
* atomic_inc - increment atomic variable
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically increments @v by 1.
*/
static __inline__ void atomic_inc(atomic_t *v)
{
......@@ -116,8 +110,7 @@ static __inline__ void atomic_inc(atomic_t *v)
* atomic_dec - decrement atomic variable
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* Atomically decrements @v by 1.
*/
static __inline__ void atomic_dec(atomic_t *v)
{
......@@ -133,8 +126,7 @@ static __inline__ void atomic_dec(atomic_t *v)
*
* Atomically decrements @v by 1 and
* returns true if the result is 0, or false for all other
* cases. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* cases.
*/
static __inline__ int atomic_dec_and_test(atomic_t *v)
{
......@@ -153,8 +145,7 @@ static __inline__ int atomic_dec_and_test(atomic_t *v)
*
* Atomically increments @v by 1
* and returns true if the result is zero, or false for all
* other cases. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* other cases.
*/
static __inline__ int atomic_inc_and_test(atomic_t *v)
{
......@@ -174,8 +165,7 @@ static __inline__ int atomic_inc_and_test(atomic_t *v)
*
* Atomically adds @i to @v and returns true
* if the result is negative, or false when
* result is greater than or equal to zero. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
* result is greater than or equal to zero.
*/
static __inline__ int atomic_add_negative(int i, atomic_t *v)
{
......
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