thermal: hwmon: EXPORT_SYMBOL_GPL for thermal hwmon sysfs - net-next.git - net-next plumbings

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author	Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>	2016-07-04 07:19:32 +0000
committer	Zhang Rui <rui.zhang@intel.com>	2016-08-08 10:57:39 +0800
commit	f4c592439b144ef1de66eac764140643a54099eb (patch)
tree	a8c3413a08d45a96b8c060ca6670396a56378717 /Documentation
parent	d0b7306d203c82e7c04d6eb066ca4898f016ebdd (diff)

thermal: hwmon: EXPORT_SYMBOL_GPL for thermal hwmon sysfs

thermal_add_hwmon_sysfs()/thermal_remove_hwmon_sysfs() need EXPORT_SYMBOL_GPL(). Otherwise we will have ERROR >> ERROR: "thermal_remove_hwmon_sysfs" [drivers/thermal/rcar_thermal.ko] undefined! >> ERROR: "thermal_add_hwmon_sysfs" [drivers/thermal/rcar_thermal.ko] undefined! Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>

Diffstat (limited to 'Documentation')

0 files changed, 0 insertions, 0 deletions

hash chain to happen on the same time. Kristen Johansen <kjlx@templeofstupid.com> reported: > This can cause a panic when simultaneous callers of put_mountpoint > attempt to free the same mountpoint. This occurs because some callers > hold the mount_hash_lock, while others hold the namespace lock. Some > even hold both. > > In this submitter's case, the panic manifested itself as a GP fault in > put_mountpoint() when it called hlist_del() and attempted to dereference > a m_hash.pprev that had been poisioned by another thread. Al Viro observed that the simple fix is to switch from using the namespace_sem to the mount_lock to protect the mountpoint hash table. I have taken Al's suggested patch moved put_mountpoint in pivot_root (instead of taking mount_lock an additional time), and have replaced new_mountpoint with get_mountpoint a function that does the hash table lookup and addition under the mount_lock. The introduction of get_mounptoint ensures that only the mount_lock is needed to manipulate the mountpoint hashtable. d_set_mounted is modified to only set DCACHE_MOUNTED if it is not already set. This allows get_mountpoint to use the setting of DCACHE_MOUNTED to ensure adding a struct mountpoint for a dentry happens exactly once. Cc: stable@vger.kernel.org Fixes: ce07d891a089 ("mnt: Honor MNT_LOCKED when detaching mounts") Reported-by: Krister Johansen <kjlx@templeofstupid.com> Suggested-by: Al Viro <viro@ZenIV.linux.org.uk> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

Diffstat (limited to 'include/trace/events')