sysfs, kernfs: introduce kernfs_notify()
Introduce kernfs interface to wake up poll(2) which takes and returns
sysfs_dirents.
sysfs_notify_dirent() is renamed to kernfs_notify() and sysfs_notify()
is updated so that it doesn't directly grab sysfs_mutex but acquires
the target sysfs_dirents using sysfs_get_dirent().
sysfs_notify_dirent() is reimplemented as a dumb inline wrapper around
kernfs_notify().
This patch doesn't introduce any behavior changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 2bc735d..0ab2b02 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -243,7 +243,6 @@
const char *link_name);
void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
-void sysfs_notify_dirent(struct sysfs_dirent *sd);
struct sysfs_dirent *sysfs_get_dirent_ns(struct sysfs_dirent *parent_sd,
const unsigned char *name,
const void *ns);
@@ -418,9 +417,6 @@
const char *attr)
{
}
-static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)
-{
-}
static inline struct sysfs_dirent *
sysfs_get_dirent_ns(struct sysfs_dirent *parent_sd, const unsigned char *name,
const void *ns)
@@ -466,4 +462,9 @@
return sysfs_get_dirent_ns(parent_sd, name, NULL);
}
+static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)
+{
+ kernfs_notify(sd);
+}
+
#endif /* _SYSFS_H_ */