Commit 5faafd56 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Paul E. McKenney
Browse files

locking/atomics: Provide the arch_atomic_ interface to generic code 



Architectures with instrumented (KASAN/KCSAN) atomic operations
natively provide arch_atomic_ variants that are not instrumented.

It turns out that some generic code also requires arch_atomic_ in
order to avoid instrumentation, so provide the arch_atomic_ interface
as a direct map into the regular atomic_ interface for
non-instrumented architectures.

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent b3a9e3b9

include/linux/atomic-fallback.h

+235 −1
Original line number Diff line number Diff line
@@ -77,6 +77,9 @@ 


#endif /* cmpxchg64_relaxed */



#define arch_atomic_read atomic_read

#define arch_atomic_read_acquire atomic_read_acquire



#ifndef atomic_read_acquire

static __always_inline int

atomic_read_acquire(const atomic_t *v)
@@ -86,6 +89,9 @@ atomic_read_acquire(const atomic_t *v) 
#define atomic_read_acquire atomic_read_acquire

#endif



#define arch_atomic_set atomic_set

#define arch_atomic_set_release atomic_set_release



#ifndef atomic_set_release

static __always_inline void

atomic_set_release(atomic_t *v, int i)
@@ -95,6 +101,13 @@ atomic_set_release(atomic_t *v, int i) 
#define atomic_set_release atomic_set_release

#endif



#define arch_atomic_add atomic_add



#define arch_atomic_add_return atomic_add_return

#define arch_atomic_add_return_acquire atomic_add_return_acquire

#define arch_atomic_add_return_release atomic_add_return_release

#define arch_atomic_add_return_relaxed atomic_add_return_relaxed



#ifndef atomic_add_return_relaxed

#define atomic_add_return_acquire atomic_add_return

#define atomic_add_return_release atomic_add_return
@@ -137,6 +150,11 @@ atomic_add_return(int i, atomic_t *v) 


#endif /* atomic_add_return_relaxed */



#define arch_atomic_fetch_add atomic_fetch_add

#define arch_atomic_fetch_add_acquire atomic_fetch_add_acquire

#define arch_atomic_fetch_add_release atomic_fetch_add_release

#define arch_atomic_fetch_add_relaxed atomic_fetch_add_relaxed



#ifndef atomic_fetch_add_relaxed

#define atomic_fetch_add_acquire atomic_fetch_add

#define atomic_fetch_add_release atomic_fetch_add
@@ -179,6 +197,13 @@ atomic_fetch_add(int i, atomic_t *v) 


#endif /* atomic_fetch_add_relaxed */



#define arch_atomic_sub atomic_sub



#define arch_atomic_sub_return atomic_sub_return

#define arch_atomic_sub_return_acquire atomic_sub_return_acquire

#define arch_atomic_sub_return_release atomic_sub_return_release

#define arch_atomic_sub_return_relaxed atomic_sub_return_relaxed



#ifndef atomic_sub_return_relaxed

#define atomic_sub_return_acquire atomic_sub_return

#define atomic_sub_return_release atomic_sub_return
@@ -221,6 +246,11 @@ atomic_sub_return(int i, atomic_t *v) 


#endif /* atomic_sub_return_relaxed */



#define arch_atomic_fetch_sub atomic_fetch_sub

#define arch_atomic_fetch_sub_acquire atomic_fetch_sub_acquire

#define arch_atomic_fetch_sub_release atomic_fetch_sub_release

#define arch_atomic_fetch_sub_relaxed atomic_fetch_sub_relaxed



#ifndef atomic_fetch_sub_relaxed

#define atomic_fetch_sub_acquire atomic_fetch_sub

#define atomic_fetch_sub_release atomic_fetch_sub
@@ -263,6 +293,8 @@ atomic_fetch_sub(int i, atomic_t *v) 


#endif /* atomic_fetch_sub_relaxed */



#define arch_atomic_inc atomic_inc



#ifndef atomic_inc

static __always_inline void

atomic_inc(atomic_t *v)
@@ -272,6 +304,11 @@ atomic_inc(atomic_t *v) 
#define atomic_inc atomic_inc

#endif



#define arch_atomic_inc_return atomic_inc_return

#define arch_atomic_inc_return_acquire atomic_inc_return_acquire

#define arch_atomic_inc_return_release atomic_inc_return_release

#define arch_atomic_inc_return_relaxed atomic_inc_return_relaxed



#ifndef atomic_inc_return_relaxed

#ifdef atomic_inc_return

#define atomic_inc_return_acquire atomic_inc_return
@@ -353,6 +390,11 @@ atomic_inc_return(atomic_t *v) 


#endif /* atomic_inc_return_relaxed */



#define arch_atomic_fetch_inc atomic_fetch_inc

#define arch_atomic_fetch_inc_acquire atomic_fetch_inc_acquire

#define arch_atomic_fetch_inc_release atomic_fetch_inc_release

#define arch_atomic_fetch_inc_relaxed atomic_fetch_inc_relaxed



#ifndef atomic_fetch_inc_relaxed

#ifdef atomic_fetch_inc

#define atomic_fetch_inc_acquire atomic_fetch_inc
@@ -434,6 +476,8 @@ atomic_fetch_inc(atomic_t *v) 


#endif /* atomic_fetch_inc_relaxed */



#define arch_atomic_dec atomic_dec



#ifndef atomic_dec

static __always_inline void

atomic_dec(atomic_t *v)
@@ -443,6 +487,11 @@ atomic_dec(atomic_t *v) 
#define atomic_dec atomic_dec

#endif



#define arch_atomic_dec_return atomic_dec_return

#define arch_atomic_dec_return_acquire atomic_dec_return_acquire

#define arch_atomic_dec_return_release atomic_dec_return_release

#define arch_atomic_dec_return_relaxed atomic_dec_return_relaxed



#ifndef atomic_dec_return_relaxed

#ifdef atomic_dec_return

#define atomic_dec_return_acquire atomic_dec_return
@@ -524,6 +573,11 @@ atomic_dec_return(atomic_t *v) 


#endif /* atomic_dec_return_relaxed */



#define arch_atomic_fetch_dec atomic_fetch_dec

#define arch_atomic_fetch_dec_acquire atomic_fetch_dec_acquire

#define arch_atomic_fetch_dec_release atomic_fetch_dec_release

#define arch_atomic_fetch_dec_relaxed atomic_fetch_dec_relaxed



#ifndef atomic_fetch_dec_relaxed

#ifdef atomic_fetch_dec

#define atomic_fetch_dec_acquire atomic_fetch_dec
@@ -605,6 +659,13 @@ atomic_fetch_dec(atomic_t *v) 


#endif /* atomic_fetch_dec_relaxed */



#define arch_atomic_and atomic_and



#define arch_atomic_fetch_and atomic_fetch_and

#define arch_atomic_fetch_and_acquire atomic_fetch_and_acquire

#define arch_atomic_fetch_and_release atomic_fetch_and_release

#define arch_atomic_fetch_and_relaxed atomic_fetch_and_relaxed



#ifndef atomic_fetch_and_relaxed

#define atomic_fetch_and_acquire atomic_fetch_and

#define atomic_fetch_and_release atomic_fetch_and
@@ -647,6 +708,8 @@ atomic_fetch_and(int i, atomic_t *v) 


#endif /* atomic_fetch_and_relaxed */



#define arch_atomic_andnot atomic_andnot



#ifndef atomic_andnot

static __always_inline void

atomic_andnot(int i, atomic_t *v)
@@ -656,6 +719,11 @@ atomic_andnot(int i, atomic_t *v) 
#define atomic_andnot atomic_andnot

#endif



#define arch_atomic_fetch_andnot atomic_fetch_andnot

#define arch_atomic_fetch_andnot_acquire atomic_fetch_andnot_acquire

#define arch_atomic_fetch_andnot_release atomic_fetch_andnot_release

#define arch_atomic_fetch_andnot_relaxed atomic_fetch_andnot_relaxed



#ifndef atomic_fetch_andnot_relaxed

#ifdef atomic_fetch_andnot

#define atomic_fetch_andnot_acquire atomic_fetch_andnot
@@ -737,6 +805,13 @@ atomic_fetch_andnot(int i, atomic_t *v) 


#endif /* atomic_fetch_andnot_relaxed */



#define arch_atomic_or atomic_or



#define arch_atomic_fetch_or atomic_fetch_or

#define arch_atomic_fetch_or_acquire atomic_fetch_or_acquire

#define arch_atomic_fetch_or_release atomic_fetch_or_release

#define arch_atomic_fetch_or_relaxed atomic_fetch_or_relaxed



#ifndef atomic_fetch_or_relaxed

#define atomic_fetch_or_acquire atomic_fetch_or

#define atomic_fetch_or_release atomic_fetch_or
@@ -779,6 +854,13 @@ atomic_fetch_or(int i, atomic_t *v) 


#endif /* atomic_fetch_or_relaxed */



#define arch_atomic_xor atomic_xor



#define arch_atomic_fetch_xor atomic_fetch_xor

#define arch_atomic_fetch_xor_acquire atomic_fetch_xor_acquire

#define arch_atomic_fetch_xor_release atomic_fetch_xor_release

#define arch_atomic_fetch_xor_relaxed atomic_fetch_xor_relaxed



#ifndef atomic_fetch_xor_relaxed

#define atomic_fetch_xor_acquire atomic_fetch_xor

#define atomic_fetch_xor_release atomic_fetch_xor
@@ -821,6 +903,11 @@ atomic_fetch_xor(int i, atomic_t *v) 


#endif /* atomic_fetch_xor_relaxed */



#define arch_atomic_xchg atomic_xchg

#define arch_atomic_xchg_acquire atomic_xchg_acquire

#define arch_atomic_xchg_release atomic_xchg_release

#define arch_atomic_xchg_relaxed atomic_xchg_relaxed



#ifndef atomic_xchg_relaxed

#define atomic_xchg_acquire atomic_xchg

#define atomic_xchg_release atomic_xchg
@@ -863,6 +950,11 @@ atomic_xchg(atomic_t *v, int i) 


#endif /* atomic_xchg_relaxed */



#define arch_atomic_cmpxchg atomic_cmpxchg

#define arch_atomic_cmpxchg_acquire atomic_cmpxchg_acquire

#define arch_atomic_cmpxchg_release atomic_cmpxchg_release

#define arch_atomic_cmpxchg_relaxed atomic_cmpxchg_relaxed



#ifndef atomic_cmpxchg_relaxed

#define atomic_cmpxchg_acquire atomic_cmpxchg

#define atomic_cmpxchg_release atomic_cmpxchg
@@ -905,6 +997,11 @@ atomic_cmpxchg(atomic_t *v, int old, int new) 


#endif /* atomic_cmpxchg_relaxed */



#define arch_atomic_try_cmpxchg atomic_try_cmpxchg

#define arch_atomic_try_cmpxchg_acquire atomic_try_cmpxchg_acquire

#define arch_atomic_try_cmpxchg_release atomic_try_cmpxchg_release

#define arch_atomic_try_cmpxchg_relaxed atomic_try_cmpxchg_relaxed



#ifndef atomic_try_cmpxchg_relaxed

#ifdef atomic_try_cmpxchg

#define atomic_try_cmpxchg_acquire atomic_try_cmpxchg
@@ -1002,6 +1099,8 @@ atomic_try_cmpxchg(atomic_t *v, int *old, int new) 


#endif /* atomic_try_cmpxchg_relaxed */



#define arch_atomic_sub_and_test atomic_sub_and_test



#ifndef atomic_sub_and_test

/**

 * atomic_sub_and_test - subtract value from variable and test result
@@ -1020,6 +1119,8 @@ atomic_sub_and_test(int i, atomic_t *v) 
#define atomic_sub_and_test atomic_sub_and_test

#endif



#define arch_atomic_dec_and_test atomic_dec_and_test



#ifndef atomic_dec_and_test

/**

 * atomic_dec_and_test - decrement and test
@@ -1037,6 +1138,8 @@ atomic_dec_and_test(atomic_t *v) 
#define atomic_dec_and_test atomic_dec_and_test

#endif



#define arch_atomic_inc_and_test atomic_inc_and_test



#ifndef atomic_inc_and_test

/**

 * atomic_inc_and_test - increment and test
@@ -1054,6 +1157,8 @@ atomic_inc_and_test(atomic_t *v) 
#define atomic_inc_and_test atomic_inc_and_test

#endif



#define arch_atomic_add_negative atomic_add_negative



#ifndef atomic_add_negative

/**

 * atomic_add_negative - add and test if negative
@@ -1072,6 +1177,8 @@ atomic_add_negative(int i, atomic_t *v) 
#define atomic_add_negative atomic_add_negative

#endif



#define arch_atomic_fetch_add_unless atomic_fetch_add_unless



#ifndef atomic_fetch_add_unless

/**

 * atomic_fetch_add_unless - add unless the number is already a given value
@@ -1097,6 +1204,8 @@ atomic_fetch_add_unless(atomic_t *v, int a, int u) 
#define atomic_fetch_add_unless atomic_fetch_add_unless

#endif



#define arch_atomic_add_unless atomic_add_unless



#ifndef atomic_add_unless

/**

 * atomic_add_unless - add unless the number is already a given value
@@ -1115,6 +1224,8 @@ atomic_add_unless(atomic_t *v, int a, int u) 
#define atomic_add_unless atomic_add_unless

#endif



#define arch_atomic_inc_not_zero atomic_inc_not_zero



#ifndef atomic_inc_not_zero

/**

 * atomic_inc_not_zero - increment unless the number is zero
@@ -1131,6 +1242,8 @@ atomic_inc_not_zero(atomic_t *v) 
#define atomic_inc_not_zero atomic_inc_not_zero

#endif



#define arch_atomic_inc_unless_negative atomic_inc_unless_negative



#ifndef atomic_inc_unless_negative

static __always_inline bool

atomic_inc_unless_negative(atomic_t *v)
@@ -1147,6 +1260,8 @@ atomic_inc_unless_negative(atomic_t *v) 
#define atomic_inc_unless_negative atomic_inc_unless_negative

#endif



#define arch_atomic_dec_unless_positive atomic_dec_unless_positive



#ifndef atomic_dec_unless_positive

static __always_inline bool

atomic_dec_unless_positive(atomic_t *v)
@@ -1163,6 +1278,8 @@ atomic_dec_unless_positive(atomic_t *v) 
#define atomic_dec_unless_positive atomic_dec_unless_positive

#endif



#define arch_atomic_dec_if_positive atomic_dec_if_positive



#ifndef atomic_dec_if_positive

static __always_inline int

atomic_dec_if_positive(atomic_t *v)
@@ -1184,6 +1301,9 @@ atomic_dec_if_positive(atomic_t *v) 
#include <asm-generic/atomic64.h>

#endif



#define arch_atomic64_read atomic64_read

#define arch_atomic64_read_acquire atomic64_read_acquire



#ifndef atomic64_read_acquire

static __always_inline s64

atomic64_read_acquire(const atomic64_t *v)
@@ -1193,6 +1313,9 @@ atomic64_read_acquire(const atomic64_t *v) 
#define atomic64_read_acquire atomic64_read_acquire

#endif



#define arch_atomic64_set atomic64_set

#define arch_atomic64_set_release atomic64_set_release



#ifndef atomic64_set_release

static __always_inline void

atomic64_set_release(atomic64_t *v, s64 i)
@@ -1202,6 +1325,13 @@ atomic64_set_release(atomic64_t *v, s64 i) 
#define atomic64_set_release atomic64_set_release

#endif



#define arch_atomic64_add atomic64_add



#define arch_atomic64_add_return atomic64_add_return

#define arch_atomic64_add_return_acquire atomic64_add_return_acquire

#define arch_atomic64_add_return_release atomic64_add_return_release

#define arch_atomic64_add_return_relaxed atomic64_add_return_relaxed



#ifndef atomic64_add_return_relaxed

#define atomic64_add_return_acquire atomic64_add_return

#define atomic64_add_return_release atomic64_add_return
@@ -1244,6 +1374,11 @@ atomic64_add_return(s64 i, atomic64_t *v) 


#endif /* atomic64_add_return_relaxed */



#define arch_atomic64_fetch_add atomic64_fetch_add

#define arch_atomic64_fetch_add_acquire atomic64_fetch_add_acquire

#define arch_atomic64_fetch_add_release atomic64_fetch_add_release

#define arch_atomic64_fetch_add_relaxed atomic64_fetch_add_relaxed



#ifndef atomic64_fetch_add_relaxed

#define atomic64_fetch_add_acquire atomic64_fetch_add

#define atomic64_fetch_add_release atomic64_fetch_add
@@ -1286,6 +1421,13 @@ atomic64_fetch_add(s64 i, atomic64_t *v) 


#endif /* atomic64_fetch_add_relaxed */



#define arch_atomic64_sub atomic64_sub



#define arch_atomic64_sub_return atomic64_sub_return

#define arch_atomic64_sub_return_acquire atomic64_sub_return_acquire

#define arch_atomic64_sub_return_release atomic64_sub_return_release

#define arch_atomic64_sub_return_relaxed atomic64_sub_return_relaxed



#ifndef atomic64_sub_return_relaxed

#define atomic64_sub_return_acquire atomic64_sub_return

#define atomic64_sub_return_release atomic64_sub_return
@@ -1328,6 +1470,11 @@ atomic64_sub_return(s64 i, atomic64_t *v) 


#endif /* atomic64_sub_return_relaxed */



#define arch_atomic64_fetch_sub atomic64_fetch_sub

#define arch_atomic64_fetch_sub_acquire atomic64_fetch_sub_acquire

#define arch_atomic64_fetch_sub_release atomic64_fetch_sub_release

#define arch_atomic64_fetch_sub_relaxed atomic64_fetch_sub_relaxed



#ifndef atomic64_fetch_sub_relaxed

#define atomic64_fetch_sub_acquire atomic64_fetch_sub

#define atomic64_fetch_sub_release atomic64_fetch_sub
@@ -1370,6 +1517,8 @@ atomic64_fetch_sub(s64 i, atomic64_t *v) 


#endif /* atomic64_fetch_sub_relaxed */



#define arch_atomic64_inc atomic64_inc



#ifndef atomic64_inc

static __always_inline void

atomic64_inc(atomic64_t *v)
@@ -1379,6 +1528,11 @@ atomic64_inc(atomic64_t *v) 
#define atomic64_inc atomic64_inc

#endif



#define arch_atomic64_inc_return atomic64_inc_return

#define arch_atomic64_inc_return_acquire atomic64_inc_return_acquire

#define arch_atomic64_inc_return_release atomic64_inc_return_release

#define arch_atomic64_inc_return_relaxed atomic64_inc_return_relaxed



#ifndef atomic64_inc_return_relaxed

#ifdef atomic64_inc_return

#define atomic64_inc_return_acquire atomic64_inc_return
@@ -1460,6 +1614,11 @@ atomic64_inc_return(atomic64_t *v) 


#endif /* atomic64_inc_return_relaxed */



#define arch_atomic64_fetch_inc atomic64_fetch_inc

#define arch_atomic64_fetch_inc_acquire atomic64_fetch_inc_acquire

#define arch_atomic64_fetch_inc_release atomic64_fetch_inc_release

#define arch_atomic64_fetch_inc_relaxed atomic64_fetch_inc_relaxed



#ifndef atomic64_fetch_inc_relaxed

#ifdef atomic64_fetch_inc

#define atomic64_fetch_inc_acquire atomic64_fetch_inc
@@ -1541,6 +1700,8 @@ atomic64_fetch_inc(atomic64_t *v) 


#endif /* atomic64_fetch_inc_relaxed */



#define arch_atomic64_dec atomic64_dec



#ifndef atomic64_dec

static __always_inline void

atomic64_dec(atomic64_t *v)
@@ -1550,6 +1711,11 @@ atomic64_dec(atomic64_t *v) 
#define atomic64_dec atomic64_dec

#endif



#define arch_atomic64_dec_return atomic64_dec_return

#define arch_atomic64_dec_return_acquire atomic64_dec_return_acquire

#define arch_atomic64_dec_return_release atomic64_dec_return_release

#define arch_atomic64_dec_return_relaxed atomic64_dec_return_relaxed



#ifndef atomic64_dec_return_relaxed

#ifdef atomic64_dec_return

#define atomic64_dec_return_acquire atomic64_dec_return
@@ -1631,6 +1797,11 @@ atomic64_dec_return(atomic64_t *v) 


#endif /* atomic64_dec_return_relaxed */



#define arch_atomic64_fetch_dec atomic64_fetch_dec

#define arch_atomic64_fetch_dec_acquire atomic64_fetch_dec_acquire

#define arch_atomic64_fetch_dec_release atomic64_fetch_dec_release

#define arch_atomic64_fetch_dec_relaxed atomic64_fetch_dec_relaxed



#ifndef atomic64_fetch_dec_relaxed

#ifdef atomic64_fetch_dec

#define atomic64_fetch_dec_acquire atomic64_fetch_dec
@@ -1712,6 +1883,13 @@ atomic64_fetch_dec(atomic64_t *v) 


#endif /* atomic64_fetch_dec_relaxed */



#define arch_atomic64_and atomic64_and



#define arch_atomic64_fetch_and atomic64_fetch_and

#define arch_atomic64_fetch_and_acquire atomic64_fetch_and_acquire

#define arch_atomic64_fetch_and_release atomic64_fetch_and_release

#define arch_atomic64_fetch_and_relaxed atomic64_fetch_and_relaxed



#ifndef atomic64_fetch_and_relaxed

#define atomic64_fetch_and_acquire atomic64_fetch_and

#define atomic64_fetch_and_release atomic64_fetch_and
@@ -1754,6 +1932,8 @@ atomic64_fetch_and(s64 i, atomic64_t *v) 


#endif /* atomic64_fetch_and_relaxed */



#define arch_atomic64_andnot atomic64_andnot



#ifndef atomic64_andnot

static __always_inline void

atomic64_andnot(s64 i, atomic64_t *v)
@@ -1763,6 +1943,11 @@ atomic64_andnot(s64 i, atomic64_t *v) 
#define atomic64_andnot atomic64_andnot

#endif



#define arch_atomic64_fetch_andnot atomic64_fetch_andnot

#define arch_atomic64_fetch_andnot_acquire atomic64_fetch_andnot_acquire

#define arch_atomic64_fetch_andnot_release atomic64_fetch_andnot_release

#define arch_atomic64_fetch_andnot_relaxed atomic64_fetch_andnot_relaxed



#ifndef atomic64_fetch_andnot_relaxed

#ifdef atomic64_fetch_andnot

#define atomic64_fetch_andnot_acquire atomic64_fetch_andnot
@@ -1844,6 +2029,13 @@ atomic64_fetch_andnot(s64 i, atomic64_t *v) 


#endif /* atomic64_fetch_andnot_relaxed */



#define arch_atomic64_or atomic64_or



#define arch_atomic64_fetch_or atomic64_fetch_or

#define arch_atomic64_fetch_or_acquire atomic64_fetch_or_acquire

#define arch_atomic64_fetch_or_release atomic64_fetch_or_release

#define arch_atomic64_fetch_or_relaxed atomic64_fetch_or_relaxed



#ifndef atomic64_fetch_or_relaxed

#define atomic64_fetch_or_acquire atomic64_fetch_or

#define atomic64_fetch_or_release atomic64_fetch_or
@@ -1886,6 +2078,13 @@ atomic64_fetch_or(s64 i, atomic64_t *v) 


#endif /* atomic64_fetch_or_relaxed */



#define arch_atomic64_xor atomic64_xor



#define arch_atomic64_fetch_xor atomic64_fetch_xor

#define arch_atomic64_fetch_xor_acquire atomic64_fetch_xor_acquire

#define arch_atomic64_fetch_xor_release atomic64_fetch_xor_release

#define arch_atomic64_fetch_xor_relaxed atomic64_fetch_xor_relaxed



#ifndef atomic64_fetch_xor_relaxed

#define atomic64_fetch_xor_acquire atomic64_fetch_xor

#define atomic64_fetch_xor_release atomic64_fetch_xor
@@ -1928,6 +2127,11 @@ atomic64_fetch_xor(s64 i, atomic64_t *v) 


#endif /* atomic64_fetch_xor_relaxed */



#define arch_atomic64_xchg atomic64_xchg

#define arch_atomic64_xchg_acquire atomic64_xchg_acquire

#define arch_atomic64_xchg_release atomic64_xchg_release

#define arch_atomic64_xchg_relaxed atomic64_xchg_relaxed



#ifndef atomic64_xchg_relaxed

#define atomic64_xchg_acquire atomic64_xchg

#define atomic64_xchg_release atomic64_xchg
@@ -1970,6 +2174,11 @@ atomic64_xchg(atomic64_t *v, s64 i) 


#endif /* atomic64_xchg_relaxed */



#define arch_atomic64_cmpxchg atomic64_cmpxchg

#define arch_atomic64_cmpxchg_acquire atomic64_cmpxchg_acquire

#define arch_atomic64_cmpxchg_release atomic64_cmpxchg_release

#define arch_atomic64_cmpxchg_relaxed atomic64_cmpxchg_relaxed



#ifndef atomic64_cmpxchg_relaxed

#define atomic64_cmpxchg_acquire atomic64_cmpxchg

#define atomic64_cmpxchg_release atomic64_cmpxchg
@@ -2012,6 +2221,11 @@ atomic64_cmpxchg(atomic64_t *v, s64 old, s64 new) 


#endif /* atomic64_cmpxchg_relaxed */



#define arch_atomic64_try_cmpxchg atomic64_try_cmpxchg

#define arch_atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg_acquire

#define arch_atomic64_try_cmpxchg_release atomic64_try_cmpxchg_release

#define arch_atomic64_try_cmpxchg_relaxed atomic64_try_cmpxchg_relaxed



#ifndef atomic64_try_cmpxchg_relaxed

#ifdef atomic64_try_cmpxchg

#define atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg
@@ -2109,6 +2323,8 @@ atomic64_try_cmpxchg(atomic64_t *v, s64 *old, s64 new) 


#endif /* atomic64_try_cmpxchg_relaxed */



#define arch_atomic64_sub_and_test atomic64_sub_and_test



#ifndef atomic64_sub_and_test

/**

 * atomic64_sub_and_test - subtract value from variable and test result
@@ -2127,6 +2343,8 @@ atomic64_sub_and_test(s64 i, atomic64_t *v) 
#define atomic64_sub_and_test atomic64_sub_and_test

#endif



#define arch_atomic64_dec_and_test atomic64_dec_and_test



#ifndef atomic64_dec_and_test

/**

 * atomic64_dec_and_test - decrement and test
@@ -2144,6 +2362,8 @@ atomic64_dec_and_test(atomic64_t *v) 
#define atomic64_dec_and_test atomic64_dec_and_test

#endif



#define arch_atomic64_inc_and_test atomic64_inc_and_test



#ifndef atomic64_inc_and_test

/**

 * atomic64_inc_and_test - increment and test
@@ -2161,6 +2381,8 @@ atomic64_inc_and_test(atomic64_t *v) 
#define atomic64_inc_and_test atomic64_inc_and_test

#endif



#define arch_atomic64_add_negative atomic64_add_negative



#ifndef atomic64_add_negative

/**

 * atomic64_add_negative - add and test if negative
@@ -2179,6 +2401,8 @@ atomic64_add_negative(s64 i, atomic64_t *v) 
#define atomic64_add_negative atomic64_add_negative

#endif



#define arch_atomic64_fetch_add_unless atomic64_fetch_add_unless



#ifndef atomic64_fetch_add_unless

/**

 * atomic64_fetch_add_unless - add unless the number is already a given value
@@ -2204,6 +2428,8 @@ atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u) 
#define atomic64_fetch_add_unless atomic64_fetch_add_unless

#endif



#define arch_atomic64_add_unless atomic64_add_unless



#ifndef atomic64_add_unless

/**

 * atomic64_add_unless - add unless the number is already a given value
@@ -2222,6 +2448,8 @@ atomic64_add_unless(atomic64_t *v, s64 a, s64 u) 
#define atomic64_add_unless atomic64_add_unless

#endif



#define arch_atomic64_inc_not_zero atomic64_inc_not_zero



#ifndef atomic64_inc_not_zero

/**

 * atomic64_inc_not_zero - increment unless the number is zero
@@ -2238,6 +2466,8 @@ atomic64_inc_not_zero(atomic64_t *v) 
#define atomic64_inc_not_zero atomic64_inc_not_zero

#endif



#define arch_atomic64_inc_unless_negative atomic64_inc_unless_negative



#ifndef atomic64_inc_unless_negative

static __always_inline bool

atomic64_inc_unless_negative(atomic64_t *v)
@@ -2254,6 +2484,8 @@ atomic64_inc_unless_negative(atomic64_t *v) 
#define atomic64_inc_unless_negative atomic64_inc_unless_negative

#endif



#define arch_atomic64_dec_unless_positive atomic64_dec_unless_positive



#ifndef atomic64_dec_unless_positive

static __always_inline bool

atomic64_dec_unless_positive(atomic64_t *v)
@@ -2270,6 +2502,8 @@ atomic64_dec_unless_positive(atomic64_t *v) 
#define atomic64_dec_unless_positive atomic64_dec_unless_positive

#endif



#define arch_atomic64_dec_if_positive atomic64_dec_if_positive



#ifndef atomic64_dec_if_positive

static __always_inline s64

atomic64_dec_if_positive(atomic64_t *v)
@@ -2288,4 +2522,4 @@ atomic64_dec_if_positive(atomic64_t *v) 
#endif



#endif /* _LINUX_ATOMIC_FALLBACK_H */

// 1fac0941c79bf0ae100723cc2ac9b94061f0b67a
 
// 9d95b56f98d82a2a26c7b79ccdd0c47572d50a6f

scripts/atomic/gen-atomic-fallback.sh

+31 −0
Original line number Diff line number Diff line
@@ -58,6 +58,21 @@ cat << EOF 
EOF

}



gen_proto_order_variant()

{

	local meta="$1"; shift

	local pfx="$1"; shift

	local name="$1"; shift

	local sfx="$1"; shift

	local order="$1"; shift

	local arch="$1"

	local atomic="$2"



	local basename="${arch}${atomic}_${pfx}${name}${sfx}"



	printf "#define arch_${basename}${order} ${basename}${order}\n"

}



#gen_proto_order_variants(meta, pfx, name, sfx, arch, atomic, int, args...)

gen_proto_order_variants()

{
@@ -72,6 +87,22 @@ gen_proto_order_variants() 


	local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"



	if [ -z "$arch" ]; then

		gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"



		if meta_has_acquire "${meta}"; then

			gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"

		fi

		if meta_has_release "${meta}"; then

			gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"

		fi

		if meta_has_relaxed "${meta}"; then

			gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"

		fi



		echo ""

	fi



	# If we don't have relaxed atomics, then we don't bother with ordering fallbacks

	# read_acquire and set_release need to be templated, though

	if ! meta_has_relaxed "${meta}"; then

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