[PATCH 14/28] mn10300: Provide atomic_{or,xor,and}

Peter Zijlstra
2015-07-16T17:21:24Z

[-- Attachment #1: peterz-mn10300-atomic_logic_ops.patch --]
[-- Type: text/plain, Size: 2346 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/mn10300/include/asm/atomic.h | 57 ++++++--------------------------------
1 file changed, 10 insertions(+), 47 deletions(-)

--- a/arch/mn10300/include/asm/atomic.h
+++ b/arch/mn10300/include/asm/atomic.h
@@ -89,6 +89,12 @@ 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
@@ -134,31 +140,9 @@ static inline void atomic_dec(atomic_t *
*
* Atomically clears the bits set in mask from the memory word specified.
*/
-static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
+static inline __deprecated void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
-#ifdef CONFIG_SMP
- int status;
-
- asm volatile(
- "1: mov %3,(_AAR,%2) \n"
- " mov (_ADR,%2),%0 \n"
- " and %4,%0 \n"
- " mov %0,(_ADR,%2) \n"
- " mov (_ADR,%2),%0 \n" /* flush */
- " mov (_ASR,%2),%0 \n"
- " or %0,%0 \n"
- " bne 1b \n"
- : "=&r"(status), "=m"(*addr)
- : "a"(ATOMIC_OPS_BASE_ADDR), "r"(addr), "r"(~mask)
- : "memory", "cc");
-#else
- unsigned long flags;
-
- mask = ~mask;
- flags = arch_local_cli_save();
- *addr &= mask;
- arch_local_irq_restore(flags);
-#endif
+ atomic_and(~mask, v);
}

/**
@@ -168,30 +152,9 @@ static inline void atomic_clear_mask(uns
*
* Atomically sets the bits set in mask from the memory word specified.
*/
-static inline void atomic_set_mask(unsigned long mask, unsigned long *addr)
+static inline __deprecated void atomic_set_mask(unsigned int mask, atomic_t *v)
{
-#ifdef CONFIG_SMP
- int status;
-
- asm volatile(
- "1: mov %3,(_AAR,%2) \n"
- " mov (_ADR,%2),%0 \n"
- " or %4,%0 \n"
- " mov %0,(_ADR,%2) \n"
- " mov (_ADR,%2),%0 \n" /* flush */
- " mov (_ASR,%2),%0 \n"
- " or %0,%0 \n"
- " bne 1b \n"
- : "=&r"(status), "=m"(*addr)
- : "a"(ATOMIC_OPS_BASE_ADDR), "r"(addr), "r"(mask)
- : "memory", "cc");
-#else
- unsigned long flags;
-
- flags = arch_local_cli_save();
- *addr |= mask;
- arch_local_irq_restore(flags);
-#endif
+ atomic_or(mask, v);
}

#endif /* __KERNEL__ */