[PATCH v1] kernel/sysctl.c: Switch to bitmap_zalloc()

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

Switch to bitmap_zalloc() to show clearly what we are allocating.
Besides that it returns pointer of bitmap type instead of opaque void *.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 kernel/sysctl.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 46a0d0a14a66..cea18c7c2594 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -3167,9 +3167,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
 		if (IS_ERR(kbuf))
 			return PTR_ERR(kbuf);
 
-		tmp_bitmap = kcalloc(BITS_TO_LONGS(bitmap_len),
-				     sizeof(unsigned long),
-				     GFP_KERNEL);
+		tmp_bitmap = bitmap_zalloc(bitmap_len, GFP_KERNEL);
 		if (!tmp_bitmap) {
 			kfree(kbuf);
 			return -ENOMEM;
@@ -3260,7 +3258,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
 		*ppos += *lenp;
 	}
 
-	kfree(tmp_bitmap);
+	bitmap_free(tmp_bitmap);
 	return err;
 }
 
-- 
2.20.1