kernel: explicitly include required header files under kernel/

Following an experimental deletion of the unnecessary directive

 #include <linux/slab.h>

from the header file <linux/percpu.h>, these files under kernel/ were exposed
as needing to include one of <linux/slab.h> or <linux/gfp.h>, so explicit
includes were added where necessary.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
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/kernel/user_namespace.c b/kernel/user_namespace.c
index 4c9006275df7..2731ba80e30b 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -8,6 +8,7 @@
 #include <linux/module.h>
 #include <linux/version.h>
 #include <linux/nsproxy.h>
+#include <linux/slab.h>
 #include <linux/user_namespace.h>
 
 /*