[PATCH 12/28] metag: Provide atomic_{or,xor,and}

Peter Zijlstra
2015-07-16T17:21:22Z

[-- Attachment #1: peterz-metag-atomic_logic_ops.patch --]
[-- Type: text/plain, Size: 2706 bytes --]

Implement atomic logic ops -- atomic_{or,xor,and}.

These will replace the atomic_{set,clear}_mask functions that are
available on some archs.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/metag/include/asm/atomic_lnkget.h | 38 ++++++++-------------------------
arch/metag/include/asm/atomic_lock1.h | 21 ++++++------------
2 files changed, 17 insertions(+), 42 deletions(-)

--- a/arch/metag/include/asm/atomic_lnkget.h
+++ b/arch/metag/include/asm/atomic_lnkget.h
@@ -74,42 +74,24 @@ static inline int atomic_##op##_return(i
ATOMIC_OPS(add)
ATOMIC_OPS(sub)

+#define CONFIG_ARCH_HAS_ATOMIC_OR
+
+ATOMIC_OP(and)
+ATOMIC_OP(or)
+ATOMIC_OP(xor)
+
#undef ATOMIC_OPS
#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP

-static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
+static inline __deprecated void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
- int temp;
-
- asm volatile (
- "1: LNKGETD %0, [%1]\n"
- " AND %0, %0, %2\n"
- " LNKSETD [%1] %0\n"
- " DEFR %0, TXSTAT\n"
- " ANDT %0, %0, #HI(0x3f000000)\n"
- " CMPT %0, #HI(0x02000000)\n"
- " BNZ 1b\n"
- : "=&d" (temp)
- : "da" (&v->counter), "bd" (~mask)
- : "cc");
+ atomic_and(~mask, v);
}

-static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
+static inline __deprecated void atomic_set_mask(unsigned int mask, atomic_t *v)
{
- int temp;
-
- asm volatile (
- "1: LNKGETD %0, [%1]\n"
- " OR %0, %0, %2\n"
- " LNKSETD [%1], %0\n"
- " DEFR %0, TXSTAT\n"
- " ANDT %0, %0, #HI(0x3f000000)\n"
- " CMPT %0, #HI(0x02000000)\n"
- " BNZ 1b\n"
- : "=&d" (temp)
- : "da" (&v->counter), "bd" (mask)
- : "cc");
+ atomic_or(mask, v);
}

static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
--- a/arch/metag/include/asm/atomic_lock1.h
+++ b/arch/metag/include/asm/atomic_lock1.h
@@ -68,29 +68,22 @@ static inline int atomic_##op##_return(i

ATOMIC_OPS(add, +=)
ATOMIC_OPS(sub, -=)
+ATOMIC_OP(and, &=)
+ATOMIC_OP(or, |=)
+ATOMIC_OP(xor, ^=)

#undef ATOMIC_OPS
#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP

-static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
+static inline __deprecated void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
- unsigned long flags;
-
- __global_lock1(flags);
- fence();
- v->counter &= ~mask;
- __global_unlock1(flags);
+ atomic_and(~mask, v);
}

-static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
+static inline __deprecated void atomic_set_mask(unsigned int mask, atomic_t *v)
{
- unsigned long flags;
-
- __global_lock1(flags);
- fence();
- v->counter |= mask;
- __global_unlock1(flags);
+ atomic_or(mask, v);
}

static inline int atomic_cmpxchg(atomic_t *v, int old, int new)