Remove ugly casts by using the more natural kmalloc/kfree allocation,
also replace GFP_USER(pointless here) with GFP_KERNEL.

Reviewed-by: Pedro Falcato <pfalcato@suse.de>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
 mm/mincore.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mm/mincore.c b/mm/mincore.c
index 0eb832ee0a30..bff19a0df9f5 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -12,6 +12,7 @@
 #include <linux/gfp.h>
 #include <linux/pagewalk.h>
 #include <linux/mman.h>
+#include <linux/slab.h>
 #include <linux/syscalls.h>
 #include <linux/swap.h>
 #include <linux/leafops.h>
@@ -313,7 +314,7 @@ SYSCALL_DEFINE3(mincore, unsigned long, start, size_t, len,
 	if (!access_ok(vec, pages))
 		return -EFAULT;
 
-	tmp = (void *) __get_free_page(GFP_USER);
+	tmp = kmalloc(PAGE_SIZE, GFP_KERNEL);
 	if (!tmp)
 		return -EAGAIN;
 
@@ -338,6 +339,6 @@ SYSCALL_DEFINE3(mincore, unsigned long, start, size_t, len,
 		start += retval << PAGE_SHIFT;
 		retval = 0;
 	}
-	free_page((unsigned long) tmp);
+	kfree(tmp);
 	return retval;
 }
-- 
2.55.0