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/20220210202805.7750-4-rikard.falkeborn@gmail.com/

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 <rmclure@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220307231414.86560-1-rmclure@linux.ibm.com

arch/powerpc/include/asm/spu.h

@@ -249,8 +249,8 @@ void unregister_spu_syscalls(struct spufs_calls *calls);
 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

@@ -130,7 +130,7 @@ static struct attribute *generic_compat_events_attr[] = {
 	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,
 };
@@ -146,7 +146,7 @@ static struct attribute *generic_compat_pmu_format_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

@@ -204,7 +204,7 @@ static struct attribute *format_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group format_group = {
+static const struct attribute_group format_group = {
 	.name = "format",
 	.attrs = format_attrs,
 };
@@ -1148,7 +1148,7 @@ static struct attribute *cpumask_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group cpumask_attr_group = {
+static const struct attribute_group cpumask_attr_group = {
 	.attrs = cpumask_attrs,
 };
 
@@ -1162,7 +1162,7 @@ static struct attribute *if_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

@@ -65,12 +65,12 @@ static struct attribute *format_attrs[] = {
 	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,
 };
@@ -126,11 +126,11 @@ static struct attribute *cpumask_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

@@ -71,7 +71,7 @@ static struct attribute *imc_format_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group imc_format_group = {
+static const struct attribute_group imc_format_group = {
 	.name = "format",
 	.attrs = imc_format_attrs,
 };
@@ -90,7 +90,7 @@ static struct attribute *trace_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,
 };
@@ -125,7 +125,7 @@ static struct attribute *imc_pmu_cpumask_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

@@ -37,7 +37,7 @@ static struct attribute *isa207_pmu_format_attr[] = {
 	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

@@ -200,12 +200,12 @@ static struct attribute *power10_events_attr[] = {
 	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,
 };
@@ -253,7 +253,7 @@ static struct attribute *power10_pmu_format_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

@@ -405,7 +405,7 @@ static struct attribute *power7_events_attr[] = {
 	NULL
 };
 
-static struct attribute_group power7_pmu_events_group = {
+static const struct attribute_group power7_pmu_events_group = {
 	.name = "events",
 	.attrs = power7_events_attr,
 };
@@ -417,7 +417,7 @@ static struct attribute *power7_pmu_format_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

@@ -92,7 +92,7 @@ enum {
  */
 
 /* 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] = {
@@ -182,7 +182,7 @@ static struct attribute *power8_events_attr[] = {
 	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

@@ -96,7 +96,7 @@ extern u64 PERF_REG_EXTENDED_MASK;
 #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,
@@ -217,7 +217,7 @@ static struct attribute *power9_events_attr[] = {
 	NULL
 };
 
-static struct attribute_group power9_pmu_events_group = {
+static const struct attribute_group power9_pmu_events_group = {
 	.name = "events",
 	.attrs = power9_events_attr,
 };
@@ -253,7 +253,7 @@ static struct attribute *power9_pmu_format_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

@@ -255,7 +255,7 @@ static struct attribute *spu_attributes[] = {
 	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

@@ -490,7 +490,7 @@ int spu_add_dev_attr(struct device_attribute *attr)
 }
 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;
@@ -529,7 +529,7 @@ void spu_remove_dev_attr(struct device_attribute *attr)
 }
 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

@@ -603,7 +603,7 @@ static struct bin_attribute *mpipl_bin_attr[] = {
 
 };
 
-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

@@ -150,7 +150,7 @@ static struct attribute *initiate_attrs[] = {
 	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

@@ -512,7 +512,7 @@ static struct attribute *image_op_attrs[] = {
 	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

@@ -1039,7 +1039,7 @@ static struct attribute *papr_nd_attributes[] = {
 	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

@@ -51,7 +51,7 @@ static struct attribute *g[] = {
         NULL,
 };
 
-static struct attribute_group attr_group = {
+static const struct attribute_group attr_group = {
         .attrs = g,
 };