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authorKay Sievers <kay.sievers@vrfy.org>2011-05-10 21:27:34 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2011-05-17 23:19:18 +0200
commit13d53f8775c6a00b070a3eef6833795412eb7fcd (patch)
tree4d8d2c2261c9c41bfc37b1199b8789f5037e49ad
parentc3b0795c98c08351567464150db66d11e05d7611 (diff)
downloadop-kernel-dev-13d53f8775c6a00b070a3eef6833795412eb7fcd.zip
op-kernel-dev-13d53f8775c6a00b070a3eef6833795412eb7fcd.tar.gz
kmod: always provide usermodehelper_disable()
We need to prevent kernel-forked processes during system poweroff. Such processes try to access the filesystem whose disks we are trying to shutdown at the same time. This causes delays and exceptions in the storage drivers. A follow-up patch will add these calls and need usermodehelper_disable() also on systems without suspend support. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
-rw-r--r--include/linux/kmod.h4
-rw-r--r--kernel/kmod.c7
2 files changed, 0 insertions, 11 deletions
diff --git a/include/linux/kmod.h b/include/linux/kmod.h
index 7f3dbcb..3102318 100644
--- a/include/linux/kmod.h
+++ b/include/linux/kmod.h
@@ -111,12 +111,8 @@ call_usermodehelper(char *path, char **argv, char **envp, enum umh_wait wait)
extern void usermodehelper_init(void);
-#ifdef CONFIG_PM_SLEEP
extern int usermodehelper_disable(void);
extern void usermodehelper_enable(void);
extern bool usermodehelper_is_disabled(void);
-#else
-static inline bool usermodehelper_is_disabled(void) { return false; }
-#endif
#endif /* __LINUX_KMOD_H__ */
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 9ab513b..5ae0ff3 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -245,7 +245,6 @@ static void __call_usermodehelper(struct work_struct *work)
}
}
-#ifdef CONFIG_PM_SLEEP
/*
* If set, call_usermodehelper_exec() will exit immediately returning -EBUSY
* (used for preventing user land processes from being created after the user
@@ -321,12 +320,6 @@ static void helper_unlock(void)
if (atomic_dec_and_test(&running_helpers))
wake_up(&running_helpers_waitq);
}
-#else /* CONFIG_PM_SLEEP */
-#define usermodehelper_disabled 0
-
-static inline void helper_lock(void) {}
-static inline void helper_unlock(void) {}
-#endif /* CONFIG_PM_SLEEP */
/**
* call_usermodehelper_setup - prepare to call a usermode helper
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