diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index e319c67c5964a66f78173bf60f5c6d6b16ef2e20..f62c2d125b69a114d6e44979675b6c31a29d9e43 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -95,5 +95,7 @@ source "drivers/staging/android/Kconfig"
 
 source "drivers/staging/dst/Kconfig"
 
+source "drivers/staging/pohmelfs/Kconfig"
+
 endif # !STAGING_EXCLUDE_BUILD
 endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 1971299a82fd3309b2a8eb12f13b466a24fe4775..16a8d703319f28b13a40b93f0b56ef5bc84ffa32 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -30,3 +30,4 @@ obj-$(CONFIG_TRANZPORT)		+= frontier/
 obj-$(CONFIG_EPL)		+= epl/
 obj-$(CONFIG_ANDROID)		+= android/
 obj-$(CONFIG_DST)		+= dst/
+obj-$(CONFIG_POHMELFS)		+= pohmelfs/
diff --git a/drivers/staging/pohmelfs/Kconfig b/drivers/staging/pohmelfs/Kconfig
new file mode 100644
index 0000000000000000000000000000000000000000..82d13ad67c86e17be48d78401f38dd51b031e82d
--- /dev/null
+++ b/drivers/staging/pohmelfs/Kconfig
@@ -0,0 +1,23 @@
+config POHMELFS
+	tristate "POHMELFS filesystem support"
+	select CONNECTOR
+	help
+	  POHMELFS stands for Parallel Optimized Host Message Exchange Layered File System.
+	  This is a network filesystem which supports coherent caching of data and metadata
+	  on clients.
+
+config POHMELFS_DEBUG
+	bool "POHMELFS debugging"
+	depends on POHMELFS
+	default n
+	help
+	  Turns on excessive POHMELFS debugging facilities.
+	  You usually do not want to slow things down noticebly and get really lots of kernel
+	  messages in syslog.
+
+config POHMELFS_CRYPTO
+	bool "POHMELFS crypto support"
+	depends on CONFIG_CRYPTO_BLKCIPHER && CONFIG_CRYPTO_HASH
+	help
+	  This option allows to encrypt and/or protect with strong cryptographic hash all dataflow
+	  between server and clients. Each config group can have own keys.
diff --git a/drivers/staging/pohmelfs/Makefile b/drivers/staging/pohmelfs/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..196561ca26bc7a8fd1941f6893f82aa5157fca26
--- /dev/null
+++ b/drivers/staging/pohmelfs/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_POHMELFS)	+= pohmelfs.o
+
+pohmelfs-y := inode.o config.o dir.o net.o path_entry.o trans.o crypto.o lock.o mcache.o
diff --git a/mm/filemap.c b/mm/filemap.c
index fc11974f2bee5ea0d39941f3dfce8b0b84910579..2e2d38ebda4bbf0b323bf0011634f87ac0b67402 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -513,6 +513,7 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
 	}
 	return ret;
 }
+EXPORT_SYMBOL_GPL(add_to_page_cache_lru);
 
 #ifdef CONFIG_NUMA
 struct page *__page_cache_alloc(gfp_t gfp)
@@ -645,6 +646,7 @@ int __lock_page_killable(struct page *page)
 	return __wait_on_bit_lock(page_waitqueue(page), &wait,
 					sync_page_killable, TASK_KILLABLE);
 }
+EXPORT_SYMBOL_GPL(__lock_page_killable);
 
 /**
  * __lock_page_nosync - get a lock on the page, without calling sync_page()