ovl: use kvalloc in xattr copy-up
Extended attributes are usually small, but could be up to 64k in size, so
use the most efficient method for doing the allocation.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 9d8ebf0..4e7d5bf 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -63,7 +63,7 @@ int ovl_copy_xattr(struct super_block *sb, struct dentry *old,
return list_size;
}
- buf = kzalloc(list_size, GFP_KERNEL);
+ buf = kvzalloc(list_size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
@@ -106,11 +106,12 @@ int ovl_copy_xattr(struct super_block *sb, struct dentry *old,
if (size > value_size) {
void *new;
- new = krealloc(value, size, GFP_KERNEL);
+ new = kvmalloc(size, GFP_KERNEL);
if (!new) {
error = -ENOMEM;
break;
}
+ kvfree(value);
value = new;
value_size = size;
goto retry;
@@ -125,9 +126,9 @@ int ovl_copy_xattr(struct super_block *sb, struct dentry *old,
error = 0;
}
}
- kfree(value);
+ kvfree(value);
out:
- kfree(buf);
+ kvfree(buf);
return error;
}