[PATCH 1/3] powerpc/cacheinfo: Use cpumap_print to print cpumap

[Srikar Dronamraju]

Tejun Heo had modified shared_cpu_map_show to use scnprintf instead of
cpumap_print during support for *pb[l] format.
Refer commit 0c118b7bd09a ("powerpc: use %*pb[l] to print bitmaps including
cpumasks and nodemasks")

cpumap_print_to_pagebuf is a standard function to print cpumap.  With
commit 9cf79d115f0d ("bitmap: remove explicit newline handling using
scnprintf format string"), there is no need to print explicit newline and
trailing null character. cpumap_print_to_pagebuf internally uses
scnprintf. Hence replace scnprintf with cpumap_print_to_pagebuf.

Note: shared_cpu_map_show in drivers/base/cacheinfo.c already uses
cpumap_print_to_pagebuf.

Before this patch
# cat /sys/devices/system/cpu0/cache/index1/shared_cpu_map
00ff

#
		(Notice the extra blank line).

After this patch
# cat /sys/devices/system/cpu0/cache/index1/shared_cpu_map
00ff
#

Cc: Nathan Lynch <nathanl at linux.ibm.com>
Cc: Tejun Heo <tj at kernel.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: linuxppc-dev at lists.ozlabs.org
Signed-off-by: Srikar Dronamraju <srikar at linux.vnet.ibm.com>
---
 arch/powerpc/kernel/cacheinfo.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/cacheinfo.c b/arch/powerpc/kernel/cacheinfo.c
index 470336277c67..0d3c45e2fccd 100644
--- a/arch/powerpc/kernel/cacheinfo.c
+++ b/arch/powerpc/kernel/cacheinfo.c
@@ -652,7 +652,7 @@ static ssize_t shared_cpu_map_show(struct kobject *k, struct kobj_attribute *att
 	struct cache_index_dir *index;
 	struct cache *cache;
 	const struct cpumask *mask;
-	int ret, cpu;
+	int cpu;
 
 	index = kobj_to_cache_index_dir(k);
 	cache = index->cache;
@@ -664,11 +664,7 @@ static ssize_t shared_cpu_map_show(struct kobject *k, struct kobj_attribute *att
 		mask  = &cache->shared_cpu_map;
 	}
 
-	ret = scnprintf(buf, PAGE_SIZE - 1, "%*pb\n",
-			cpumask_pr_args(mask));
-	buf[ret++] = '\n';
-	buf[ret] = '\0';
-	return ret;
+	return cpumap_print_to_pagebuf(false, buf, mask);
 }
 
 static struct kobj_attribute cache_shared_cpu_map_attr =
-- 
2.17.1