fs: super: use GFP_KERNEL instead of GFP_USER for super block allocation

There is no reason to use a GFP_USER flag for struct super_block allocation
in the alloc_super(). Instead, let's use GFP_KERNEL for that.

>From the memory management perspective, the only difference between
GFP_USER and GFP_KERNEL is that GFP_USER allocations are tied to a cpuset,
while GFP_KERNEL ones are not.

There is no real issue and this is not a candidate to go to the stable,
but let's fix it for a consistency sake.

Cc: Jan Kara <jack@suse.cz>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: <linux-fsdevel@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>
Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Link: https://lore.kernel.org/r/20231208151022.156273-1-aleksandr.mikhalitsyn@canonical.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/super.c b/fs/super.c
index 076392396e724e210d565e6f78b35d88613e471d..6fe482371633396e54b9c454cdc59b03ac9be7a7 100644 (file)
--- a/fs/super.c
+++ b/fs/super.c
@@ -323,7 +323,7 @@ static void destroy_unused_super(struct super_block *s)
 static struct super_block *alloc_super(struct file_system_type *type, int flags,
                                       struct user_namespace *user_ns)
 {
-       struct super_block *s = kzalloc(sizeof(struct super_block),  GFP_USER);
+       struct super_block *s = kzalloc(sizeof(struct super_block), GFP_KERNEL);
        static const struct super_operations default_op;
        int i;