Contributors: 23
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Dmitriy Vyukov |
153 |
23.36% |
3 |
6.82% |
| Peter Zijlstra |
123 |
18.78% |
12 |
27.27% |
| Andi Kleen |
116 |
17.71% |
2 |
4.55% |
| Brian Gerst |
86 |
13.13% |
1 |
2.27% |
| Paul Mackerras |
64 |
9.77% |
1 |
2.27% |
| Mark Rutland |
25 |
3.82% |
4 |
9.09% |
| Ingo Molnar |
14 |
2.14% |
1 |
2.27% |
| H. Peter Anvin |
10 |
1.53% |
3 |
6.82% |
| Randy Dunlap |
10 |
1.53% |
1 |
2.27% |
| Jeremy Fitzhardinge |
10 |
1.53% |
2 |
4.55% |
| Thomas Gleixner |
7 |
1.07% |
1 |
2.27% |
| Hagen Paul Pfeifer |
7 |
1.07% |
1 |
2.27% |
| Uros Bizjak |
6 |
0.92% |
1 |
2.27% |
| David Howells |
5 |
0.76% |
2 |
4.55% |
| Denys Vlasenko |
5 |
0.76% |
1 |
2.27% |
| KaiGai Kohei |
3 |
0.46% |
1 |
2.27% |
| Mathieu Desnoyers |
2 |
0.31% |
1 |
2.27% |
| Pranith Kumar |
2 |
0.31% |
1 |
2.27% |
| Will Deacon |
2 |
0.31% |
1 |
2.27% |
| Anton Blanchard |
2 |
0.31% |
1 |
2.27% |
| Greg Kroah-Hartman |
1 |
0.15% |
1 |
2.27% |
| Gerd Hoffmann |
1 |
0.15% |
1 |
2.27% |
| Jeff Dike |
1 |
0.15% |
1 |
2.27% |
| Total |
655 |
|
44 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_ATOMIC_H
#define _ASM_X86_ATOMIC_H
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/alternative.h>
#include <asm/cmpxchg.h>
#include <asm/rmwcc.h>
#include <asm/barrier.h>
/*
* Atomic operations that C can't guarantee us. Useful for
* resource counting etc..
*/
static __always_inline int arch_atomic_read(const atomic_t *v)
{
/*
* Note for KASAN: we deliberately don't use READ_ONCE_NOCHECK() here,
* it's non-inlined function that increases binary size and stack usage.
*/
return __READ_ONCE((v)->counter);
}
static __always_inline void arch_atomic_set(atomic_t *v, int i)
{
__WRITE_ONCE(v->counter, i);
}
static __always_inline void arch_atomic_add(int i, atomic_t *v)
{
asm volatile(LOCK_PREFIX "addl %1,%0"
: "+m" (v->counter)
: "ir" (i) : "memory");
}
static __always_inline void arch_atomic_sub(int i, atomic_t *v)
{
asm volatile(LOCK_PREFIX "subl %1,%0"
: "+m" (v->counter)
: "ir" (i) : "memory");
}
static __always_inline bool arch_atomic_sub_and_test(int i, atomic_t *v)
{
return GEN_BINARY_RMWcc(LOCK_PREFIX "subl", v->counter, e, "er", i);
}
#define arch_atomic_sub_and_test arch_atomic_sub_and_test
static __always_inline void arch_atomic_inc(atomic_t *v)
{
asm volatile(LOCK_PREFIX "incl %0"
: "+m" (v->counter) :: "memory");
}
#define arch_atomic_inc arch_atomic_inc
static __always_inline void arch_atomic_dec(atomic_t *v)
{
asm volatile(LOCK_PREFIX "decl %0"
: "+m" (v->counter) :: "memory");
}
#define arch_atomic_dec arch_atomic_dec
static __always_inline bool arch_atomic_dec_and_test(atomic_t *v)
{
return GEN_UNARY_RMWcc(LOCK_PREFIX "decl", v->counter, e);
}
#define arch_atomic_dec_and_test arch_atomic_dec_and_test
static __always_inline bool arch_atomic_inc_and_test(atomic_t *v)
{
return GEN_UNARY_RMWcc(LOCK_PREFIX "incl", v->counter, e);
}
#define arch_atomic_inc_and_test arch_atomic_inc_and_test
static __always_inline bool arch_atomic_add_negative(int i, atomic_t *v)
{
return GEN_BINARY_RMWcc(LOCK_PREFIX "addl", v->counter, s, "er", i);
}
#define arch_atomic_add_negative arch_atomic_add_negative
static __always_inline int arch_atomic_add_return(int i, atomic_t *v)
{
return i + xadd(&v->counter, i);
}
#define arch_atomic_add_return arch_atomic_add_return
#define arch_atomic_sub_return(i, v) arch_atomic_add_return(-(i), v)
static __always_inline int arch_atomic_fetch_add(int i, atomic_t *v)
{
return xadd(&v->counter, i);
}
#define arch_atomic_fetch_add arch_atomic_fetch_add
#define arch_atomic_fetch_sub(i, v) arch_atomic_fetch_add(-(i), v)
static __always_inline int arch_atomic_cmpxchg(atomic_t *v, int old, int new)
{
return arch_cmpxchg(&v->counter, old, new);
}
#define arch_atomic_cmpxchg arch_atomic_cmpxchg
static __always_inline bool arch_atomic_try_cmpxchg(atomic_t *v, int *old, int new)
{
return arch_try_cmpxchg(&v->counter, old, new);
}
#define arch_atomic_try_cmpxchg arch_atomic_try_cmpxchg
static __always_inline int arch_atomic_xchg(atomic_t *v, int new)
{
return arch_xchg(&v->counter, new);
}
#define arch_atomic_xchg arch_atomic_xchg
static __always_inline void arch_atomic_and(int i, atomic_t *v)
{
asm volatile(LOCK_PREFIX "andl %1,%0"
: "+m" (v->counter)
: "ir" (i)
: "memory");
}
static __always_inline int arch_atomic_fetch_and(int i, atomic_t *v)
{
int val = arch_atomic_read(v);
do { } while (!arch_atomic_try_cmpxchg(v, &val, val & i));
return val;
}
#define arch_atomic_fetch_and arch_atomic_fetch_and
static __always_inline void arch_atomic_or(int i, atomic_t *v)
{
asm volatile(LOCK_PREFIX "orl %1,%0"
: "+m" (v->counter)
: "ir" (i)
: "memory");
}
static __always_inline int arch_atomic_fetch_or(int i, atomic_t *v)
{
int val = arch_atomic_read(v);
do { } while (!arch_atomic_try_cmpxchg(v, &val, val | i));
return val;
}
#define arch_atomic_fetch_or arch_atomic_fetch_or
static __always_inline void arch_atomic_xor(int i, atomic_t *v)
{
asm volatile(LOCK_PREFIX "xorl %1,%0"
: "+m" (v->counter)
: "ir" (i)
: "memory");
}
static __always_inline int arch_atomic_fetch_xor(int i, atomic_t *v)
{
int val = arch_atomic_read(v);
do { } while (!arch_atomic_try_cmpxchg(v, &val, val ^ i));
return val;
}
#define arch_atomic_fetch_xor arch_atomic_fetch_xor
#ifdef CONFIG_X86_32
# include <asm/atomic64_32.h>
#else
# include <asm/atomic64_64.h>
#endif
#endif /* _ASM_X86_ATOMIC_H */