[PATCH] kcov: add more missing include

[Kefeng Wang <wangkefeng.wang@huawei.com>]

It is fragile that some definitions acquired via transitive
dependencies, as shown in below:

atomic_*        (<linux/atomic.h>)
ENOMEM/EN*      (<linux/errno.h>)
EXPORT_SYMBOL   (<linux/export.h>)
device_initcall (<linux/init.h>)
preempt_*       (<linux/preempt.h>)

Include them to prevent possible issues.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
 kernel/kcov.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/kernel/kcov.c b/kernel/kcov.c
index 3cbb0c8..cc2fa35ca 100644
--- a/kernel/kcov.c
+++ b/kernel/kcov.c
@@ -1,11 +1,16 @@
 #define pr_fmt(fmt) "kcov: " fmt
 
 #define DISABLE_BRANCH_PROFILING
+#include <linux/atomic.h>
 #include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/export.h>
 #include <linux/types.h>
 #include <linux/file.h>
 #include <linux/fs.h>
+#include <linux/init.h>
 #include <linux/mm.h>
+#include <linux/preempt.h>
 #include <linux/printk.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
-- 
1.7.12.4