[PATCH 26/26] locking/atomic: treewide: delete arch_atomic_*() kerneldoc

From: Mark Rutland
Date: Mon May 22 2023 - 08:29:34 EST

Currently several architectures have kerneldoc comments for
arch_atomic_*(), which is unhelpful as these live in a shared namespace
where they clash, and the arch_atomic_*() ops are now an implementation
detail of the raw_atomic_*() ops, which no-one should use those
directly.

Delete the kerneldoc comments for arch_atomic_*(), along with
pseudo-kerneldoc comments which are in the correct style but are missing
the leading '/**' necessary to be true kerneldoc comments.

Drop x86's asm/atomic.h from Documentation/driver-api/basics.rst as it
no longer contains any relevant kerneldoc comments.

Signed-off-by: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Boqun Feng <boqun.feng@xxxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
Documentation/driver-api/basics.rst | 3 -
arch/alpha/include/asm/atomic.h | 25 --------
arch/arc/include/asm/atomic64-arcv2.h | 17 ------
arch/hexagon/include/asm/atomic.h | 16 -----
arch/loongarch/include/asm/atomic.h | 49 ---------------
arch/x86/include/asm/atomic.h | 87 ---------------------------
arch/x86/include/asm/atomic64_32.h | 76 -----------------------
arch/x86/include/asm/atomic64_64.h | 81 -------------------------
8 files changed, 354 deletions(-)

diff --git a/Documentation/driver-api/basics.rst b/Documentation/driver-api/basics.rst
index a1fbd97fb79fb..d8e4e5c82bcf0 100644
--- a/Documentation/driver-api/basics.rst
+++ b/Documentation/driver-api/basics.rst
@@ -84,9 +84,6 @@ Reference counting
Atomics
-------

-.. kernel-doc:: arch/x86/include/asm/atomic.h
- :internal:
-
.. kernel-doc:: include/linux/atomic/atomic-arch-fallback.h
:internal:

diff --git a/arch/alpha/include/asm/atomic.h b/arch/alpha/include/asm/atomic.h
index ec8ab552c527a..cbd9244571af0 100644
--- a/arch/alpha/include/asm/atomic.h
+++ b/arch/alpha/include/asm/atomic.h
@@ -200,15 +200,6 @@ ATOMIC_OPS(xor, xor)
#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP

-/**
- * arch_atomic_fetch_add_unless - add unless the number is a given value
- * @v: pointer of type atomic_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @v, so long as it was not @u.
- * Returns the old value of @v.
- */
static __inline__ int arch_atomic_fetch_add_unless(atomic_t *v, int a, int u)
{
int c, new, old;
@@ -232,15 +223,6 @@ static __inline__ int arch_atomic_fetch_add_unless(atomic_t *v, int a, int u)
}
#define arch_atomic_fetch_add_unless arch_atomic_fetch_add_unless

-/**
- * arch_atomic64_fetch_add_unless - add unless the number is a given value
- * @v: pointer of type atomic64_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @v, so long as it was not @u.
- * Returns the old value of @v.
- */
static __inline__ s64 arch_atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u)
{
s64 c, new, old;
@@ -264,13 +246,6 @@ static __inline__ s64 arch_atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u
}
#define arch_atomic64_fetch_add_unless arch_atomic64_fetch_add_unless

-/*
- * arch_atomic64_dec_if_positive - decrement by 1 if old value positive
- * @v: pointer of type atomic_t
- *
- * The function returns the old value of *v minus 1, even if
- * the atomic variable, v, was not decremented.
- */
static inline s64 arch_atomic64_dec_if_positive(atomic64_t *v)
{
s64 old, tmp;
diff --git a/arch/arc/include/asm/atomic64-arcv2.h b/arch/arc/include/asm/atomic64-arcv2.h
index 2b7c9e61a2947..6b6db981967ae 100644
--- a/arch/arc/include/asm/atomic64-arcv2.h
+++ b/arch/arc/include/asm/atomic64-arcv2.h
@@ -182,14 +182,6 @@ static inline s64 arch_atomic64_xchg(atomic64_t *ptr, s64 new)
}
#define arch_atomic64_xchg arch_atomic64_xchg

-/**
- * arch_atomic64_dec_if_positive - decrement by 1 if old value positive
- * @v: pointer of type atomic64_t
- *
- * The function returns the old value of *v minus 1, even if
- * the atomic variable, v, was not decremented.
- */
-
static inline s64 arch_atomic64_dec_if_positive(atomic64_t *v)
{
s64 val;
@@ -214,15 +206,6 @@ static inline s64 arch_atomic64_dec_if_positive(atomic64_t *v)
}
#define arch_atomic64_dec_if_positive arch_atomic64_dec_if_positive

-/**
- * arch_atomic64_fetch_add_unless - add unless the number is a given value
- * @v: pointer of type atomic64_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @v, if it was not @u.
- * Returns the old value of @v
- */
static inline s64 arch_atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u)
{
s64 old, temp;
diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h
index 5c8440016c762..2447d083c432f 100644
--- a/arch/hexagon/include/asm/atomic.h
+++ b/arch/hexagon/include/asm/atomic.h
@@ -28,12 +28,6 @@ static inline void arch_atomic_set(atomic_t *v, int new)

#define arch_atomic_set_release(v, i) arch_atomic_set((v), (i))

-/**
- * arch_atomic_read - reads a word, atomically
- * @v: pointer to atomic value
- *
- * Assumes all word reads on our architecture are atomic.
- */
#define arch_atomic_read(v) READ_ONCE((v)->counter)

#define ATOMIC_OP(op) \
@@ -112,16 +106,6 @@ ATOMIC_OPS(xor)
#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP

-/**
- * arch_atomic_fetch_add_unless - add unless the number is a given value
- * @v: pointer to value
- * @a: amount to add
- * @u: unless value is equal to u
- *
- * Returns old value.
- *
- */
-
static inline int arch_atomic_fetch_add_unless(atomic_t *v, int a, int u)
{
int __oldval;
diff --git a/arch/loongarch/include/asm/atomic.h b/arch/loongarch/include/asm/atomic.h
index 8d73c85911b08..e27f0c72d3242 100644
--- a/arch/loongarch/include/asm/atomic.h
+++ b/arch/loongarch/include/asm/atomic.h
@@ -29,21 +29,7 @@

#define ATOMIC_INIT(i) { (i) }

-/*
- * arch_atomic_read - read atomic variable
- * @v: pointer of type atomic_t
- *
- * Atomically reads the value of @v.
- */
#define arch_atomic_read(v) READ_ONCE((v)->counter)
-
-/*
- * arch_atomic_set - set atomic variable
- * @v: pointer of type atomic_t
- * @i: required value
- *
- * Atomically sets the value of @v to @i.
- */
#define arch_atomic_set(v, i) WRITE_ONCE((v)->counter, (i))

#define ATOMIC_OP(op, I, asm_op) \
@@ -139,14 +125,6 @@ static inline int arch_atomic_fetch_add_unless(atomic_t *v, int a, int u)
}
#define arch_atomic_fetch_add_unless arch_atomic_fetch_add_unless

-/*
- * arch_atomic_sub_if_positive - conditionally subtract integer from atomic variable
- * @i: integer value to subtract
- * @v: pointer of type atomic_t
- *
- * Atomically test @v and subtract @i if @v is greater or equal than @i.
- * The function returns the old value of @v minus @i.
- */
static inline int arch_atomic_sub_if_positive(int i, atomic_t *v)
{
int result;
@@ -181,28 +159,13 @@ static inline int arch_atomic_sub_if_positive(int i, atomic_t *v)
return result;
}

-/*
- * arch_atomic_dec_if_positive - decrement by 1 if old value positive
- * @v: pointer of type atomic_t
- */
#define arch_atomic_dec_if_positive(v) arch_atomic_sub_if_positive(1, v)

#ifdef CONFIG_64BIT

#define ATOMIC64_INIT(i) { (i) }

-/*
- * arch_atomic64_read - read atomic variable
- * @v: pointer of type atomic64_t
- *
- */
#define arch_atomic64_read(v) READ_ONCE((v)->counter)
-
-/*
- * arch_atomic64_set - set atomic variable
- * @v: pointer of type atomic64_t
- * @i: required value
- */
#define arch_atomic64_set(v, i) WRITE_ONCE((v)->counter, (i))

#define ATOMIC64_OP(op, I, asm_op) \
@@ -297,14 +260,6 @@ static inline long arch_atomic64_fetch_add_unless(atomic64_t *v, long a, long u)
}
#define arch_atomic64_fetch_add_unless arch_atomic64_fetch_add_unless

-/*
- * arch_atomic64_sub_if_positive - conditionally subtract integer from atomic variable
- * @i: integer value to subtract
- * @v: pointer of type atomic64_t
- *
- * Atomically test @v and subtract @i if @v is greater or equal than @i.
- * The function returns the old value of @v minus @i.
- */
static inline long arch_atomic64_sub_if_positive(long i, atomic64_t *v)
{
long result;
@@ -339,10 +294,6 @@ static inline long arch_atomic64_sub_if_positive(long i, atomic64_t *v)
return result;
}

-/*
- * arch_atomic64_dec_if_positive - decrement by 1 if old value positive
- * @v: pointer of type atomic64_t
- */
#define arch_atomic64_dec_if_positive(v) arch_atomic64_sub_if_positive(1, v)

#endif /* CONFIG_64BIT */
diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h
index 5e754e8957671..55a55ec043502 100644
--- a/arch/x86/include/asm/atomic.h
+++ b/arch/x86/include/asm/atomic.h
@@ -14,12 +14,6 @@
* resource counting etc..
*/

-/**
- * arch_atomic_read - read atomic variable
- * @v: pointer of type atomic_t
- *
- * Atomically reads the value of @v.
- */
static __always_inline int arch_atomic_read(const atomic_t *v)
{
/*
@@ -29,25 +23,11 @@ static __always_inline int arch_atomic_read(const atomic_t *v)
return __READ_ONCE((v)->counter);
}

-/**
- * arch_atomic_set - set atomic variable
- * @v: pointer of type atomic_t
- * @i: required value
- *
- * Atomically sets the value of @v to @i.
- */
static __always_inline void arch_atomic_set(atomic_t *v, int i)
{
__WRITE_ONCE(v->counter, i);
}

-/**
- * arch_atomic_add - add integer to atomic variable
- * @i: integer value to add
- * @v: pointer of type atomic_t
- *
- * Atomically adds @i to @v.
- */
static __always_inline void arch_atomic_add(int i, atomic_t *v)
{
asm volatile(LOCK_PREFIX "addl %1,%0"
@@ -55,13 +35,6 @@ static __always_inline void arch_atomic_add(int i, atomic_t *v)
: "ir" (i) : "memory");
}

-/**
- * arch_atomic_sub - subtract integer from atomic variable
- * @i: integer value to subtract
- * @v: pointer of type atomic_t
- *
- * Atomically subtracts @i from @v.
- */
static __always_inline void arch_atomic_sub(int i, atomic_t *v)
{
asm volatile(LOCK_PREFIX "subl %1,%0"
@@ -69,27 +42,12 @@ static __always_inline void arch_atomic_sub(int i, atomic_t *v)
: "ir" (i) : "memory");
}

-/**
- * arch_atomic_sub_and_test - subtract value from variable and test result
- * @i: integer value to subtract
- * @v: pointer of type atomic_t
- *
- * Atomically subtracts @i from @v and returns
- * true if the result is zero, or false for all
- * other cases.
- */
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

-/**
- * arch_atomic_inc - increment atomic variable
- * @v: pointer of type atomic_t
- *
- * Atomically increments @v by 1.
- */
static __always_inline void arch_atomic_inc(atomic_t *v)
{
asm volatile(LOCK_PREFIX "incl %0"
@@ -97,12 +55,6 @@ static __always_inline void arch_atomic_inc(atomic_t *v)
}
#define arch_atomic_inc arch_atomic_inc

-/**
- * arch_atomic_dec - decrement atomic variable
- * @v: pointer of type atomic_t
- *
- * Atomically decrements @v by 1.
- */
static __always_inline void arch_atomic_dec(atomic_t *v)
{
asm volatile(LOCK_PREFIX "decl %0"
@@ -110,69 +62,30 @@ static __always_inline void arch_atomic_dec(atomic_t *v)
}
#define arch_atomic_dec arch_atomic_dec

-/**
- * arch_atomic_dec_and_test - decrement and test
- * @v: pointer of type atomic_t
- *
- * Atomically decrements @v by 1 and
- * returns true if the result is 0, or false for all other
- * cases.
- */
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

-/**
- * arch_atomic_inc_and_test - increment and test
- * @v: pointer of type atomic_t
- *
- * Atomically increments @v by 1
- * and returns true if the result is zero, or false for all
- * other cases.
- */
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

-/**
- * arch_atomic_add_negative - add and test if negative
- * @i: integer value to add
- * @v: pointer of type atomic_t
- *
- * Atomically adds @i to @v and returns true
- * if the result is negative, or false when
- * result is greater than or equal to zero.
- */
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

-/**
- * arch_atomic_add_return - add integer and return
- * @i: integer value to add
- * @v: pointer of type atomic_t
- *
- * Atomically adds @i to @v and returns @i + @v
- */
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

-/**
- * arch_atomic_sub_return - subtract integer and return
- * @v: pointer of type atomic_t
- * @i: integer value to subtract
- *
- * Atomically subtracts @i from @v and returns @v - @i
- */
static __always_inline int arch_atomic_sub_return(int i, atomic_t *v)
{
return arch_atomic_add_return(-i, v);
diff --git a/arch/x86/include/asm/atomic64_32.h b/arch/x86/include/asm/atomic64_32.h
index 808b4eece251e..3486d91b8595f 100644
--- a/arch/x86/include/asm/atomic64_32.h
+++ b/arch/x86/include/asm/atomic64_32.h
@@ -61,30 +61,12 @@ ATOMIC64_DECL(add_unless);
#undef __ATOMIC64_DECL
#undef ATOMIC64_EXPORT

-/**
- * arch_atomic64_cmpxchg - cmpxchg atomic64 variable
- * @v: pointer to type atomic64_t
- * @o: expected value
- * @n: new value
- *
- * Atomically sets @v to @n if it was equal to @o and returns
- * the old value.
- */
-
static __always_inline s64 arch_atomic64_cmpxchg(atomic64_t *v, s64 o, s64 n)
{
return arch_cmpxchg64(&v->counter, o, n);
}
#define arch_atomic64_cmpxchg arch_atomic64_cmpxchg

-/**
- * arch_atomic64_xchg - xchg atomic64 variable
- * @v: pointer to type atomic64_t
- * @n: value to assign
- *
- * Atomically xchgs the value of @v to @n and returns
- * the old value.
- */
static __always_inline s64 arch_atomic64_xchg(atomic64_t *v, s64 n)
{
s64 o;
@@ -97,13 +79,6 @@ static __always_inline s64 arch_atomic64_xchg(atomic64_t *v, s64 n)
}
#define arch_atomic64_xchg arch_atomic64_xchg

-/**
- * arch_atomic64_set - set atomic64 variable
- * @v: pointer to type atomic64_t
- * @i: value to assign
- *
- * Atomically sets the value of @v to @n.
- */
static __always_inline void arch_atomic64_set(atomic64_t *v, s64 i)
{
unsigned high = (unsigned)(i >> 32);
@@ -113,12 +88,6 @@ static __always_inline void arch_atomic64_set(atomic64_t *v, s64 i)
: "eax", "edx", "memory");
}

-/**
- * arch_atomic64_read - read atomic64 variable
- * @v: pointer to type atomic64_t
- *
- * Atomically reads the value of @v and returns it.
- */
static __always_inline s64 arch_atomic64_read(const atomic64_t *v)
{
s64 r;
@@ -126,13 +95,6 @@ static __always_inline s64 arch_atomic64_read(const atomic64_t *v)
return r;
}

-/**
- * arch_atomic64_add_return - add and return
- * @i: integer value to add
- * @v: pointer to type atomic64_t
- *
- * Atomically adds @i to @v and returns @i + *@v
- */
static __always_inline s64 arch_atomic64_add_return(s64 i, atomic64_t *v)
{
alternative_atomic64(add_return,
@@ -142,9 +104,6 @@ static __always_inline s64 arch_atomic64_add_return(s64 i, atomic64_t *v)
}
#define arch_atomic64_add_return arch_atomic64_add_return

-/*
- * Other variants with different arithmetic operators:
- */
static __always_inline s64 arch_atomic64_sub_return(s64 i, atomic64_t *v)
{
alternative_atomic64(sub_return,
@@ -172,13 +131,6 @@ static __always_inline s64 arch_atomic64_dec_return(atomic64_t *v)
}
#define arch_atomic64_dec_return arch_atomic64_dec_return

-/**
- * arch_atomic64_add - add integer to atomic64 variable
- * @i: integer value to add
- * @v: pointer to type atomic64_t
- *
- * Atomically adds @i to @v.
- */
static __always_inline s64 arch_atomic64_add(s64 i, atomic64_t *v)
{
__alternative_atomic64(add, add_return,
@@ -187,13 +139,6 @@ static __always_inline s64 arch_atomic64_add(s64 i, atomic64_t *v)
return i;
}

-/**
- * arch_atomic64_sub - subtract the atomic64 variable
- * @i: integer value to subtract
- * @v: pointer to type atomic64_t
- *
- * Atomically subtracts @i from @v.
- */
static __always_inline s64 arch_atomic64_sub(s64 i, atomic64_t *v)
{
__alternative_atomic64(sub, sub_return,
@@ -202,12 +147,6 @@ static __always_inline s64 arch_atomic64_sub(s64 i, atomic64_t *v)
return i;
}

-/**
- * arch_atomic64_inc - increment atomic64 variable
- * @v: pointer to type atomic64_t
- *
- * Atomically increments @v by 1.
- */
static __always_inline void arch_atomic64_inc(atomic64_t *v)
{
__alternative_atomic64(inc, inc_return, /* no output */,
@@ -215,12 +154,6 @@ static __always_inline void arch_atomic64_inc(atomic64_t *v)
}
#define arch_atomic64_inc arch_atomic64_inc

-/**
- * arch_atomic64_dec - decrement atomic64 variable
- * @v: pointer to type atomic64_t
- *
- * Atomically decrements @v by 1.
- */
static __always_inline void arch_atomic64_dec(atomic64_t *v)
{
__alternative_atomic64(dec, dec_return, /* no output */,
@@ -228,15 +161,6 @@ static __always_inline void arch_atomic64_dec(atomic64_t *v)
}
#define arch_atomic64_dec arch_atomic64_dec

-/**
- * arch_atomic64_add_unless - add unless the number is a given value
- * @v: pointer of type atomic64_t
- * @a: the amount to add to v...
- * @u: ...unless v is equal to u.
- *
- * Atomically adds @a to @v, so long as it was not @u.
- * Returns non-zero if the add was done, zero otherwise.
- */
static __always_inline int arch_atomic64_add_unless(atomic64_t *v, s64 a, s64 u)
{
unsigned low = (unsigned)u;
diff --git a/arch/x86/include/asm/atomic64_64.h b/arch/x86/include/asm/atomic64_64.h
index c496595bf6012..3165c0feedf74 100644
--- a/arch/x86/include/asm/atomic64_64.h
+++ b/arch/x86/include/asm/atomic64_64.h
@@ -10,37 +10,16 @@

#define ATOMIC64_INIT(i) { (i) }

-/**
- * arch_atomic64_read - read atomic64 variable
- * @v: pointer of type atomic64_t
- *
- * Atomically reads the value of @v.
- * Doesn't imply a read memory barrier.
- */
static __always_inline s64 arch_atomic64_read(const atomic64_t *v)
{
return __READ_ONCE((v)->counter);
}

-/**
- * arch_atomic64_set - set atomic64 variable
- * @v: pointer to type atomic64_t
- * @i: required value
- *
- * Atomically sets the value of @v to @i.
- */
static __always_inline void arch_atomic64_set(atomic64_t *v, s64 i)
{
__WRITE_ONCE(v->counter, i);
}

-/**
- * arch_atomic64_add - add integer to atomic64 variable
- * @i: integer value to add
- * @v: pointer to type atomic64_t
- *
- * Atomically adds @i to @v.
- */
static __always_inline void arch_atomic64_add(s64 i, atomic64_t *v)
{
asm volatile(LOCK_PREFIX "addq %1,%0"
@@ -48,13 +27,6 @@ static __always_inline void arch_atomic64_add(s64 i, atomic64_t *v)
: "er" (i), "m" (v->counter) : "memory");
}

-/**
- * arch_atomic64_sub - subtract the atomic64 variable
- * @i: integer value to subtract
- * @v: pointer to type atomic64_t
- *
- * Atomically subtracts @i from @v.
- */
static __always_inline void arch_atomic64_sub(s64 i, atomic64_t *v)
{
asm volatile(LOCK_PREFIX "subq %1,%0"
@@ -62,27 +34,12 @@ static __always_inline void arch_atomic64_sub(s64 i, atomic64_t *v)
: "er" (i), "m" (v->counter) : "memory");
}

-/**
- * arch_atomic64_sub_and_test - subtract value from variable and test result
- * @i: integer value to subtract
- * @v: pointer to type atomic64_t
- *
- * Atomically subtracts @i from @v and returns
- * true if the result is zero, or false for all
- * other cases.
- */
static __always_inline bool arch_atomic64_sub_and_test(s64 i, atomic64_t *v)
{
return GEN_BINARY_RMWcc(LOCK_PREFIX "subq", v->counter, e, "er", i);
}
#define arch_atomic64_sub_and_test arch_atomic64_sub_and_test

-/**
- * arch_atomic64_inc - increment atomic64 variable
- * @v: pointer to type atomic64_t
- *
- * Atomically increments @v by 1.
- */
static __always_inline void arch_atomic64_inc(atomic64_t *v)
{
asm volatile(LOCK_PREFIX "incq %0"
@@ -91,12 +48,6 @@ static __always_inline void arch_atomic64_inc(atomic64_t *v)
}
#define arch_atomic64_inc arch_atomic64_inc

-/**
- * arch_atomic64_dec - decrement atomic64 variable
- * @v: pointer to type atomic64_t
- *
- * Atomically decrements @v by 1.
- */
static __always_inline void arch_atomic64_dec(atomic64_t *v)
{
asm volatile(LOCK_PREFIX "decq %0"
@@ -105,56 +56,24 @@ static __always_inline void arch_atomic64_dec(atomic64_t *v)
}
#define arch_atomic64_dec arch_atomic64_dec

-/**
- * arch_atomic64_dec_and_test - decrement and test
- * @v: pointer to type atomic64_t
- *
- * Atomically decrements @v by 1 and
- * returns true if the result is 0, or false for all other
- * cases.
- */
static __always_inline bool arch_atomic64_dec_and_test(atomic64_t *v)
{
return GEN_UNARY_RMWcc(LOCK_PREFIX "decq", v->counter, e);
}
#define arch_atomic64_dec_and_test arch_atomic64_dec_and_test

-/**
- * arch_atomic64_inc_and_test - increment and test
- * @v: pointer to type atomic64_t
- *
- * Atomically increments @v by 1
- * and returns true if the result is zero, or false for all
- * other cases.
- */
static __always_inline bool arch_atomic64_inc_and_test(atomic64_t *v)
{
return GEN_UNARY_RMWcc(LOCK_PREFIX "incq", v->counter, e);
}
#define arch_atomic64_inc_and_test arch_atomic64_inc_and_test

-/**
- * arch_atomic64_add_negative - add and test if negative
- * @i: integer value to add
- * @v: pointer to type atomic64_t
- *
- * Atomically adds @i to @v and returns true
- * if the result is negative, or false when
- * result is greater than or equal to zero.
- */
static __always_inline bool arch_atomic64_add_negative(s64 i, atomic64_t *v)
{
return GEN_BINARY_RMWcc(LOCK_PREFIX "addq", v->counter, s, "er", i);
}
#define arch_atomic64_add_negative arch_atomic64_add_negative

-/**
- * arch_atomic64_add_return - add and return
- * @i: integer value to add
- * @v: pointer to type atomic64_t
- *
- * Atomically adds @i to @v and returns @i + @v
- */
static __always_inline s64 arch_atomic64_add_return(s64 i, atomic64_t *v)
{
return i + xadd(&v->counter, i);
--
2.30.2