seq_file: allocate seq_file from kmem_cache

For fine-grained debugging and usercopy protection.

Link: http://lkml.kernel.org/r/20180310085027.GA17121@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Glauber Costa <glommer@gmail.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/init/main.c b/init/main.c
index 50359a3162d0..b795aa341a3a 100644
--- a/init/main.c
+++ b/init/main.c
@@ -715,6 +715,7 @@ asmlinkage __visible void __init start_kernel(void)
         vfs_caches_init();
         pagecache_init();
         signals_init();
+        seq_file_init();
         proc_root_init();
         nsfs_init();
         cpuset_init();