The patch titled
sched: fix build breakage if !SYSFS
has been added to the -mm tree. Its filename is
fix-build-breakage-if-sysfs.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: sched: fix build breakage if !SYSFS
From: Dhaval Giani <dhaval@xxxxxxxxxxxxxxxxxx>
When CONFIG_SYSFS is not set, CONFIG_FAIR_USER_SCHED fails to build
with
kernel/built-in.o: In function `uids_kobject_init':
(.init.text+0x1488): undefined reference to `kernel_subsys'
kernel/built-in.o: In function `uids_kobject_init':
(.init.text+0x1490): undefined reference to `kernel_subsys'
kernel/built-in.o: In function `uids_kobject_init':
(.init.text+0x1480): undefined reference to `kernel_subsys'
kernel/built-in.o: In function `uids_kobject_init':
(.init.text+0x1494): undefined reference to `kernel_subsys'
This patch fixes this build error.
Signed-off-by: Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Dhaval Giani <dhaval@xxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/sched.h | 2 ++
kernel/user.c | 23 +++++++++++++++--------
2 files changed, 17 insertions(+), 8 deletions(-)
diff -puN include/linux/sched.h~fix-build-breakage-if-sysfs include/linux/sched.h
--- a/include/linux/sched.h~fix-build-breakage-if-sysfs
+++ a/include/linux/sched.h
@@ -535,10 +535,12 @@ struct user_struct {
#ifdef CONFIG_FAIR_USER_SCHED
struct task_group *tg;
+#ifdef CONFIG_SYSFS
struct kset kset;
struct subsys_attribute user_attr;
struct work_struct work;
#endif
+#endif
};
#ifdef CONFIG_FAIR_USER_SCHED
diff -puN kernel/user.c~fix-build-breakage-if-sysfs kernel/user.c
--- a/kernel/user.c~fix-build-breakage-if-sysfs
+++ a/kernel/user.c
@@ -84,9 +84,6 @@ static struct user_struct *uid_hash_find
#ifdef CONFIG_FAIR_USER_SCHED
-static struct kobject uids_kobject; /* represents /sys/kernel/uids directory */
-static DEFINE_MUTEX(uids_mutex);
-
static void sched_destroy_user(struct user_struct *up)
{
sched_destroy_group(up->tg);
@@ -108,6 +105,19 @@ static void sched_switch_user(struct tas
sched_move_task(p);
}
+#else /* CONFIG_FAIR_USER_SCHED */
+
+static void sched_destroy_user(struct user_struct *up) { }
+static int sched_create_user(struct user_struct *up) { return 0; }
+static void sched_switch_user(struct task_struct *p) { }
+
+#endif /* CONFIG_FAIR_USER_SCHED */
+
+#if defined(CONFIG_FAIR_USER_SCHED) && defined(CONFIG_SYSFS)
+
+static struct kobject uids_kobject; /* represents /sys/kernel/uids directory */
+static DEFINE_MUTEX(uids_mutex);
+
static inline void uids_mutex_lock(void)
{
mutex_lock(&uids_mutex);
@@ -254,11 +264,8 @@ static inline void free_user(struct user
schedule_work(&up->work);
}
-#else /* CONFIG_FAIR_USER_SCHED */
+#else /* CONFIG_FAIR_USER_SCHED && CONFIG_SYSFS */
-static void sched_destroy_user(struct user_struct *up) { }
-static int sched_create_user(struct user_struct *up) { return 0; }
-static void sched_switch_user(struct task_struct *p) { }
static inline int user_kobject_create(struct user_struct *up) { return 0; }
static inline void uids_mutex_lock(void) { }
static inline void uids_mutex_unlock(void) { }
@@ -277,7 +284,7 @@ static inline void free_user(struct user
kmem_cache_free(uid_cachep, up);
}
-#endif /* CONFIG_FAIR_USER_SCHED */
+#endif
/*
* Locate the user_struct for the passed UID. If found, take a ref on it. The
_
Patches currently in -mm which might be from dhaval@xxxxxxxxxxxxxxxxxx are
origin.patch
fix-build-breakage-if-sysfs.patch
fix-build-breakage-if-sysfs-fix.patch
hook-up-group-scheduler-with-control-groups.patch
hook-up-group-scheduler-with-control-groups-fix.patch
-
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