powerpc: Fix bugs introduced by sysfs changes
Rusty's patch to change our sysfs access to various registers
to use smp_call_function_single() introduced a whole bunch of
warnings. This fixes them. This version also fixes an actual
bug in here where it did mtspr instead of mfspr when reading
the files
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index e6cd6c9..f41aec8 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -134,17 +134,15 @@
}
EXPORT_SYMBOL(ppc_enable_pmcs);
-
#define SYSFS_PMCSETUP(NAME, ADDRESS) \
static void read_##NAME(void *val) \
{ \
- mtspr(ADDRESS, *(unsigned long *)val); \
+ *(unsigned long *)val = mfspr(ADDRESS); \
} \
-static unsigned long write_##NAME(unsigned long val) \
+static void write_##NAME(void *val) \
{ \
ppc_enable_pmcs(); \
mtspr(ADDRESS, *(unsigned long *)val); \
- return 0; \
} \
static ssize_t show_##NAME(struct sys_device *dev, \
struct sysdev_attribute *attr, \