cpu topology: remove stale arch_provides_topology_pointers and define_siblings_show_m...

arch_provides_topology_pointers was introduced in commit 23ca4bba3 (x86:
cleanup early per cpu variables/accesses v4) to indicate pointers to the
topology cpumask_t maps are valid to avoid copying data on to/off of the
stack.

But later in commit fbd59a8d (cpumask: Use topology_core_cpumask()/
topology_thread_cpumask()), the pointers to the topology struct cpumask maps
are always valid.

After that commit, the only difference is that there is a redundant
"unsigned int cpu = dev->id;" if arch_provides_topology_pointers defined, but
dev->id is type 'u32' which devolves to 'unsigned int' on all supported arches.
So this arch_provides_topology_pointers define is pointless and only cause
obfuscation now, remove it.

Tested on x86 machine, topology information in sys/devices/system/cpu/
cpuX/topology/ is the same after appling this patch set.

Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index 2f5919e..94ffee3 100644 (file)
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -62,25 +62,6 @@ static ssize_t show_cpumap(int type, const struct cpumask *mask, char *buf)
 }
 #endif
 
-#ifdef arch_provides_topology_pointers
-#define define_siblings_show_map(name)                                 \
-static ssize_t show_##name(struct device *dev,                         \
-                          struct device_attribute *attr, char *buf)    \
-{                                                                      \
-       unsigned int cpu = dev->id;                                     \
-       return show_cpumap(0, topology_##name(cpu), buf);               \
-}
-
-#define define_siblings_show_list(name)                                        \
-static ssize_t show_##name##_list(struct device *dev,                  \
-                                 struct device_attribute *attr,        \
-                                 char *buf)                            \
-{                                                                      \
-       unsigned int cpu = dev->id;                                     \
-       return show_cpumap(1, topology_##name(cpu), buf);               \
-}
-
-#else
 #define define_siblings_show_map(name)                                 \
 static ssize_t show_##name(struct device *dev,                         \
                           struct device_attribute *attr, char *buf)    \
@@ -95,7 +76,6 @@ static ssize_t show_##name##_list(struct device *dev,                 \
 {                                                                      \
        return show_cpumap(1, topology_##name(dev->id), buf);           \
 }
-#endif
 
 #define define_siblings_show_func(name)                \
        define_siblings_show_map(name); define_siblings_show_list(name)