[PATCH 07/19] lib/list_sort.c: Rearrange includes

[Rasmus Villemoes <linux@rasmusvillemoes.dk>]

Memory allocation only happens in the self test, just as random
numbers are only used there. So move the inclusion of slab.h inside
the CONFIG_TEST_LIST_SORT.

We don't need module.h and all of the stuff it carries with it, so
replace with export.h and compiler.h. Unfortunately, the ARRAY_SIZE
macro from kernel.h requires the user to ensure bug.h is also included
(for BUILD_BUG_ON_ZERO, used by __must_be_array). We used to get that
through some maze of nested includes, but just include it explicitly.

linux/string.h is then only included implicitly through
kernel.h->printk.h->dynamic_debug.h, but only if
!CONFIG_DYNAMIC_DEBUG, so just include it explicitly (for memset).

objdump -d says the generated code is the same, and wc -l says that
lib/.list_sort.o.cmd went from 579 to 165 lines.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
---
 lib/list_sort.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/list_sort.c b/lib/list_sort.c
index 12bcba1c8612..b29015102698 100644
--- a/lib/list_sort.c
+++ b/lib/list_sort.c
@@ -2,9 +2,11 @@
 #define pr_fmt(fmt) "list_sort_test: " fmt
 
 #include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/bug.h>
+#include <linux/compiler.h>
+#include <linux/export.h>
+#include <linux/string.h>
 #include <linux/list_sort.h>
-#include <linux/slab.h>
 #include <linux/list.h>
 
 #define MAX_LIST_LENGTH_BITS 20
@@ -146,6 +148,7 @@ EXPORT_SYMBOL(list_sort);
 
 #ifdef CONFIG_TEST_LIST_SORT
 
+#include <linux/slab.h>
 #include <linux/random.h>
 
 /*
-- 
2.1.3