staging: zcache: fix Kconfig crypto dependency

ZCACHE is a boolean in the Kconfig.  When selected, it
should require that CRYPTO be builtin (=y).

Currently, ZCACHE=y and CRYPTO=m is a valid configuration
when it should not be.

This patch changes the zcache Kconfig to enforce this
dependency.

Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/zcache/Kconfig b/drivers/staging/zcache/Kconfig
index 3ed2c8f..7048e01 100644 (file)
--- a/drivers/staging/zcache/Kconfig
+++ b/drivers/staging/zcache/Kconfig
@@ -2,7 +2,7 @@ config ZCACHE
        bool "Dynamic compression of swap pages and clean pagecache pages"
        # X86 dependency is because zsmalloc uses non-portable pte/tlb
        # functions
-       depends on (CLEANCACHE || FRONTSWAP) && CRYPTO && X86
+       depends on (CLEANCACHE || FRONTSWAP) && CRYPTO=y && X86
        select ZSMALLOC
        select CRYPTO_LZO
        default n