smb: client: reduce stack usage in cifs_demultiplex_thread()

Clang warns about exceeded stack frame size

  fs/smb/client/connect.c:1109:1: warning: stack frame size (1048)
  exceeds limit (1024) in 'cifs_demultiplex_thread'
  [-Wframe-larger-than]

It turns out that clean_demultiplex_info() got inlined into
cifs_demultiplex_thread(), so mark it as noinline_for_stack to save
some stack space.

Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c
index b3461d5d0f7dae08d3107a4548a570f97a01d8fb..e19a9c81a5fa13faf20765c193a9433bc45baef4 100644 (file)
--- a/fs/smb/client/connect.c
+++ b/fs/smb/client/connect.c
@@ -911,8 +911,8 @@ cifs_enable_signing(struct TCP_Server_Info *server, bool mnt_sign_required)
        return 0;
 }
 
-
-static void clean_demultiplex_info(struct TCP_Server_Info *server)
+static noinline_for_stack void
+clean_demultiplex_info(struct TCP_Server_Info *server)
 {
        int length;