On Fri, Jun 12, 2009 at 09:04:52AM -0500, Kumar Gala wrote:
>> On UP, all the spinlock manipulation goes away and we simply disable
>> interrupts around each operation. In fact gcc eliminates the whole
>> atomic64_lock variable as well.
>>
>> Signed-off-by: Paul Mackerras
>> ---
>> Compile-tested
On Jun 12, 2009, at 7:02 AM, Paul Mackerras wrote:
32-bit powerpc processors have no 64-bit atomic instructions, but we
will
need atomic64_t in order to support the perf_counter subsystem on 32-
bit
processors.
This adds an implementation of 64-bit atomic operations using hashed
spinlocks t
32-bit powerpc processors have no 64-bit atomic instructions, but we will
need atomic64_t in order to support the perf_counter subsystem on 32-bit
processors.
This adds an implementation of 64-bit atomic operations using hashed
spinlocks to provide atomicity. For each atomic operation, the addres
