locking/atomic, arc: Use s64 for atomic64

As a step towards making the atomic64 API use consistent types treewide,
let's have the arc atomic64 implementation use s64 as the underlying
type for atomic64_t, rather than u64, matching the generated headers.

Otherwise, there should be no functional change as a result of this
patch.

Acked-By: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: aou@eecs.berkeley.edu
Cc: arnd@arndb.de
Cc: bp@alien8.de
Cc: catalin.marinas@arm.com
Cc: davem@davemloft.net
Cc: fenghua.yu@intel.com
Cc: heiko.carstens@de.ibm.com
Cc: herbert@gondor.apana.org.au
Cc: ink@jurassic.park.msu.ru
Cc: jhogan@kernel.org
Cc: linux@armlinux.org.uk
Cc: mattst88@gmail.com
Cc: mpe@ellerman.id.au
Cc: palmer@sifive.com
Cc: paul.burton@mips.com
Cc: paulus@samba.org
Cc: ralf@linux-mips.org
Cc: rth@twiddle.net
Cc: tony.luck@intel.com
Link: https://lkml.kernel.org/r/20190522132250.26499-6-mark.rutland@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/arc/include/asm/atomic.h b/arch/arc/include/asm/atomic.h
index 158af07..2c75df5 100644 (file)
--- a/arch/arc/include/asm/atomic.h
+++ b/arch/arc/include/asm/atomic.h
@@ -324,14 +324,14 @@ ATOMIC_OPS(xor, ^=, CTOP_INST_AXOR_DI_R2_R2_R3)
  */
 
 typedef struct {
-       aligned_u64 counter;
+       s64 __aligned(8) counter;
 } atomic64_t;
 
 #define ATOMIC64_INIT(a) { (a) }
 
-static inline long long atomic64_read(const atomic64_t *v)
+static inline s64 atomic64_read(const atomic64_t *v)
 {
-       unsigned long long val;
+       s64 val;
 
        __asm__ __volatile__(
        "       ldd   %0, [%1]  \n"
@@ -341,7 +341,7 @@ static inline long long atomic64_read(const atomic64_t *v)
        return val;
 }
 
-static inline void atomic64_set(atomic64_t *v, long long a)
+static inline void atomic64_set(atomic64_t *v, s64 a)
 {
        /*
         * This could have been a simple assignment in "C" but would need
@@ -362,9 +362,9 @@ static inline void atomic64_set(atomic64_t *v, long long a)
 }
 
 #define ATOMIC64_OP(op, op1, op2)                                      \
-static inline void atomic64_##op(long long a, atomic64_t *v)           \
+static inline void atomic64_##op(s64 a, atomic64_t *v)                 \
 {                                                                      \
-       unsigned long long val;                                         \
+       s64 val;                                                        \
                                                                        \
        __asm__ __volatile__(                                           \
        "1:                             \n"                             \
@@ -375,13 +375,13 @@ static inline void atomic64_##op(long long a, atomic64_t *v)              \
        "       bnz     1b              \n"                             \
        : "=&r"(val)                                                    \
        : "r"(&v->counter), "ir"(a)                                     \
-       : "cc");                                                \
+       : "cc");                                                        \
 }                                                                      \
 
 #define ATOMIC64_OP_RETURN(op, op1, op2)                               \
-static inline long long atomic64_##op##_return(long long a, atomic64_t *v)     \
+static inline s64 atomic64_##op##_return(s64 a, atomic64_t *v)         \
 {                                                                      \
-       unsigned long long val;                                         \
+       s64 val;                                                        \
                                                                        \
        smp_mb();                                                       \
                                                                        \
@@ -402,9 +402,9 @@ static inline long long atomic64_##op##_return(long long a, atomic64_t *v)  \
 }
 
 #define ATOMIC64_FETCH_OP(op, op1, op2)                                        \
-static inline long long atomic64_fetch_##op(long long a, atomic64_t *v)        \
+static inline s64 atomic64_fetch_##op(s64 a, atomic64_t *v)            \
 {                                                                      \
-       unsigned long long val, orig;                                   \
+       s64 val, orig;                                                  \
                                                                        \
        smp_mb();                                                       \
                                                                        \
@@ -444,10 +444,10 @@ ATOMIC64_OPS(xor, xor, xor)
 #undef ATOMIC64_OP_RETURN
 #undef ATOMIC64_OP
 
-static inline long long
-atomic64_cmpxchg(atomic64_t *ptr, long long expected, long long new)
+static inline s64
+atomic64_cmpxchg(atomic64_t *ptr, s64 expected, s64 new)
 {
-       long long prev;
+       s64 prev;
 
        smp_mb();
 
@@ -467,9 +467,9 @@ atomic64_cmpxchg(atomic64_t *ptr, long long expected, long long new)
        return prev;
 }
 
-static inline long long atomic64_xchg(atomic64_t *ptr, long long new)
+static inline s64 atomic64_xchg(atomic64_t *ptr, s64 new)
 {
-       long long prev;
+       s64 prev;
 
        smp_mb();
 
@@ -495,9 +495,9 @@ static inline long long atomic64_xchg(atomic64_t *ptr, long long new)
  * the atomic variable, v, was not decremented.
  */
 
-static inline long long atomic64_dec_if_positive(atomic64_t *v)
+static inline s64 atomic64_dec_if_positive(atomic64_t *v)
 {
-       long long val;
+       s64 val;
 
        smp_mb();
 
@@ -528,10 +528,9 @@ static inline long long atomic64_dec_if_positive(atomic64_t *v)
  * Atomically adds @a to @v, if it was not @u.
  * Returns the old value of @v
  */
-static inline long long atomic64_fetch_add_unless(atomic64_t *v, long long a,
-                                                 long long u)
+static inline s64 atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u)
 {
-       long long old, temp;
+       s64 old, temp;
 
        smp_mb();