1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/ssb/ssb.h b/include/linux/ssb/ssb.h
index 0eaa98424f0a..cacbae531945 100644
--- a/include/linux/ssb/ssb.h
+++ b/include/linux/ssb/ssb.h
@@ -231,7 +231,8 @@ struct ssb_bus {
         struct ssb_device *mapped_device;
         /* Currently mapped PCMCIA segment. (bustype == SSB_BUSTYPE_PCMCIA only) */
         u8 mapped_pcmcia_seg;
-        /* Lock for core and segment switching. */
+        /* Lock for core and segment switching.
+         * On PCMCIA-host busses this is used to protect the whole MMIO access. */
         spinlock_t bar_lock;
 
         /* The bus this backplane is running on. */