[PATCH 4/4] fat: allocate multiple clusters in fallocate

[Matheus Alves de Almeida]

The fat_fallocate() code currently does many 1-cluster allocations when
growing a file. Make it allocate everything with one call instead.

Signed-off-by: Matheus Alves de Almeida <matheus.aalmeida@xxxxxxxxxxxx>
---
 fs/fat/file.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/fs/fat/file.c b/fs/fat/file.c
index 41d49e9de..3aa541c6b 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -290,12 +290,10 @@ static long fat_fallocate(struct file *file, int mode,
 		nr_cluster = (mm_bytes + (sbi->cluster_size - 1)) >>
 			sbi->cluster_bits;
 
-		/* Start the allocation.We are not zeroing out the clusters */
-		while (nr_cluster-- > 0) {
-			err = fat_add_clusters(inode, 1);
-			if (err)
-				goto error;
-		}
+		/* Allocate the clusters. We are not zeroing them out */
+		err = fat_add_clusters(inode, nr_cluster);
+		if (err)
+			goto error;
 	} else {
 		if ((offset + len) <= i_size_read(inode))
 			goto error;
-- 
2.43.0