[PATCH 04/17] nilfs2: replace get_zeroed_page() with kzalloc()

nilfs_ioctl_wrap_copy() allocates a temporary buffer with
get_zeroed_page().

kzalloc() is a better API for such use and it also provides better
scalability and more debugging possibilities.

Replace use of get_zeroed_page() with kzalloc().

Signed-off-by: Mike Rapoport (Microsoft) <[email protected]>
---
 fs/nilfs2/ioctl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index e0a606643e87..b73f2c5d10f0 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -69,7 +69,7 @@ static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
 	if (argv->v_index > ~(__u64)0 - argv->v_nmembs)
 		return -EINVAL;
 
-	buf = (void *)get_zeroed_page(GFP_NOFS);
+	buf = kzalloc(PAGE_SIZE, GFP_NOFS);
 	if (unlikely(!buf))
 		return -ENOMEM;
 	maxmembs = PAGE_SIZE / argv->v_size;
@@ -107,7 +107,7 @@ static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
 	}
 	argv->v_nmembs = total;
 
-	free_pages((unsigned long)buf, 0);
+	kfree(buf);
 	return ret;
 }
 

-- 
2.53.0