powerpc: declare unmodified attribute_group usages const

Inspired by (bd75b4ef4977: Constify static attribute_group structs),
accepted by linux-next, reported:
https://patchwork.ozlabs.org/project/linuxppc-dev/patch/[e-mail]/

Nearly all singletons of type struct attribute_group are never modified,
and so are candidates for being const. Declare them as const.

Signed-off-by: Rohan McLure <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/powerpc/include/asm/spu.h

···
 int spu_add_dev_attr(struct device_attribute *attr);
 void spu_remove_dev_attr(struct device_attribute *attr);
 
-int spu_add_dev_attr_group(struct attribute_group *attrs);
-void spu_remove_dev_attr_group(struct attribute_group *attrs);
+int spu_add_dev_attr_group(const struct attribute_group *attrs);
+void spu_remove_dev_attr_group(const struct attribute_group *attrs);
 
 extern void notify_spus_active(void);
 extern void do_notify_spus_active(void);

arch/powerpc/perf/generic-compat-pmu.c

···
 	NULL
 };
 
-static struct attribute_group generic_compat_pmu_events_group = {
+static const struct attribute_group generic_compat_pmu_events_group = {
 	.name = "events",
 	.attrs = generic_compat_events_attr,
 };
···
 	NULL,
 };
 
-static struct attribute_group generic_compat_pmu_format_group = {
+static const struct attribute_group generic_compat_pmu_format_group = {
 	.name = "format",
 	.attrs = generic_compat_pmu_format_attr,
 };

arch/powerpc/perf/hv-24x7.c

···
 	NULL,
 };
 
-static struct attribute_group format_group = {
+static const struct attribute_group format_group = {
 	.name = "format",
 	.attrs = format_attrs,
 };
···
 	NULL,
 };
 
-static struct attribute_group cpumask_attr_group = {
+static const struct attribute_group cpumask_attr_group = {
 	.attrs = cpumask_attrs,
 };
 
···
 	NULL,
 };
 
-static struct attribute_group if_group = {
+static const struct attribute_group if_group = {
 	.name = "interface",
 	.bin_attrs = if_bin_attrs,
 	.attrs = if_attrs,

arch/powerpc/perf/hv-gpci.c

···
 	NULL,
 };
 
-static struct attribute_group format_group = {
+static const struct attribute_group format_group = {
 	.name = "format",
 	.attrs = format_attrs,
 };
 
-static struct attribute_group event_group = {
+static const struct attribute_group event_group = {
 	.name  = "events",
 	.attrs = hv_gpci_event_attrs,
 };
···
 	NULL,
 };
 
-static struct attribute_group cpumask_attr_group = {
+static const struct attribute_group cpumask_attr_group = {
 	.attrs = cpumask_attrs,
 };
 
-static struct attribute_group interface_group = {
+static const struct attribute_group interface_group = {
 	.name = "interface",
 	.attrs = interface_attrs,
 };

arch/powerpc/perf/imc-pmu.c

···
 	NULL,
 };
 
-static struct attribute_group imc_format_group = {
+static const struct attribute_group imc_format_group = {
 	.name = "format",
 	.attrs = imc_format_attrs,
 };
···
 	NULL,
 };
 
-static struct attribute_group trace_imc_format_group = {
+static const struct attribute_group trace_imc_format_group = {
 .name = "format",
 .attrs = trace_imc_format_attrs,
 };
···
 	NULL,
 };
 
-static struct attribute_group imc_pmu_cpumask_attr_group = {
+static const struct attribute_group imc_pmu_cpumask_attr_group = {
 	.attrs = imc_pmu_cpumask_attrs,
 };
 

arch/powerpc/perf/isa207-common.c

···
 	NULL,
 };
 
-struct attribute_group isa207_pmu_format_group = {
+const struct attribute_group isa207_pmu_format_group = {
 	.name = "format",
 	.attrs = isa207_pmu_format_attr,
 };

arch/powerpc/perf/power10-pmu.c

···
 	NULL
 };
 
-static struct attribute_group power10_pmu_events_group_dd1 = {
+static const struct attribute_group power10_pmu_events_group_dd1 = {
 	.name = "events",
 	.attrs = power10_events_attr_dd1,
 };
 
-static struct attribute_group power10_pmu_events_group = {
+static const struct attribute_group power10_pmu_events_group = {
 	.name = "events",
 	.attrs = power10_events_attr,
 };
···
 	NULL,
 };
 
-static struct attribute_group power10_pmu_format_group = {
+static const struct attribute_group power10_pmu_format_group = {
 	.name = "format",
 	.attrs = power10_pmu_format_attr,
 };

arch/powerpc/perf/power7-pmu.c

···
 	NULL
 };
 
-static struct attribute_group power7_pmu_events_group = {
+static const struct attribute_group power7_pmu_events_group = {
 	.name = "events",
 	.attrs = power7_events_attr,
 };
···
 	NULL,
 };
 
-static struct attribute_group power7_pmu_format_group = {
+static const struct attribute_group power7_pmu_format_group = {
 	.name = "format",
 	.attrs = power7_pmu_format_attr,
 };

arch/powerpc/perf/power8-pmu.c

···
  */
 
 /* PowerISA v2.07 format attribute structure*/
-extern struct attribute_group isa207_pmu_format_group;
+extern const struct attribute_group isa207_pmu_format_group;
 
 /* Table of alternatives, sorted by column 0 */
 static const unsigned int event_alternatives[][MAX_ALT] = {
···
 	NULL
 };
 
-static struct attribute_group power8_pmu_events_group = {
+static const struct attribute_group power8_pmu_events_group = {
 	.name = "events",
 	.attrs = power8_events_attr,
 };

arch/powerpc/perf/power9-pmu.c

···
 #define PVR_POWER9_CUMULUS		0x00002000
 
 /* PowerISA v2.07 format attribute structure*/
-extern struct attribute_group isa207_pmu_format_group;
+extern const struct attribute_group isa207_pmu_format_group;
 
 int p9_dd21_bl_ev[] = {
 	PM_MRK_ST_DONE_L2,
···
 	NULL
 };
 
-static struct attribute_group power9_pmu_events_group = {
+static const struct attribute_group power9_pmu_events_group = {
 	.name = "events",
 	.attrs = power9_events_attr,
 };
···
 	NULL,
 };
 
-static struct attribute_group power9_pmu_format_group = {
+static const struct attribute_group power9_pmu_format_group = {
 	.name = "format",
 	.attrs = power9_pmu_format_attr,
 };

arch/powerpc/platforms/cell/cbe_thermal.c

···
 	NULL,
 };
 
-static struct attribute_group spu_attribute_group = {
+static const struct attribute_group spu_attribute_group = {
 	.name	= "thermal",
 	.attrs	= spu_attributes,
 };

arch/powerpc/platforms/cell/spu_base.c

···
 }
 EXPORT_SYMBOL_GPL(spu_add_dev_attr);
 
-int spu_add_dev_attr_group(struct attribute_group *attrs)
+int spu_add_dev_attr_group(const struct attribute_group *attrs)
 {
 	struct spu *spu;
 	int rc = 0;
···
 }
 EXPORT_SYMBOL_GPL(spu_remove_dev_attr);
 
-void spu_remove_dev_attr_group(struct attribute_group *attrs)
+void spu_remove_dev_attr_group(const struct attribute_group *attrs)
 {
 	struct spu *spu;
 

arch/powerpc/platforms/powernv/opal-core.c

···
 
 };
 
-static struct attribute_group mpipl_group = {
+static const struct attribute_group mpipl_group = {
 	.attrs = mpipl_attr,
 	.bin_attrs =  mpipl_bin_attr,
 };

arch/powerpc/platforms/powernv/opal-dump.c

···
 	NULL,
 };
 
-static struct attribute_group initiate_attr_group = {
+static const struct attribute_group initiate_attr_group = {
 	.attrs = initiate_attrs,
 };
 

arch/powerpc/platforms/powernv/opal-flash.c

···
 	NULL	/* need to NULL terminate the list of attributes */
 };
 
-static struct attribute_group image_op_attr_group = {
+static const struct attribute_group image_op_attr_group = {
 	.attrs = image_op_attrs,
 };
 

arch/powerpc/platforms/pseries/papr_scm.c

···
 	NULL,
 };
 
-static struct attribute_group papr_nd_attribute_group = {
+static const struct attribute_group papr_nd_attribute_group = {
 	.name = "papr",
 	.is_visible = papr_nd_attribute_visible,
 	.attrs = papr_nd_attributes,

arch/powerpc/platforms/pseries/power.c

···
         NULL,
 };
 
-static struct attribute_group attr_group = {
+static const struct attribute_group attr_group = {
         .attrs = g,
 };