zram: add more compression algorithms

Add "deflate", "lz4hc", "842" algorithms to the list of known
compression backends.  The real availability of those algorithms,
however, depends on the corresponding CONFIG_CRYPTO_FOO config options.

[sergey.senozhatsky@gmail.com: zram-add-more-compression-algorithms-v3]
Link: http://lkml.kernel.org/r/20160604024902.11778-7-sergey.senozhatsky@gmail.com
Link: http://lkml.kernel.org/r/20160531122017.2878-8-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c
index 9ab45d41624b0a9b4556dc457202e33fa17745f5..32e521a2b8c8e02f6869172b8d9e4ad1ebb08618 100644 (file)
--- a/drivers/block/zram/zcomp.c
+++ b/drivers/block/zram/zcomp.c
@@ -22,6 +22,15 @@ static const char * const backends[] = {
        "lzo",
 #if IS_ENABLED(CONFIG_CRYPTO_LZ4)
        "lz4",
+#endif
+#if IS_ENABLED(CONFIG_CRYPTO_DEFLATE)
+       "deflate",
+#endif
+#if IS_ENABLED(CONFIG_CRYPTO_LZ4HC)
+       "lz4hc",
+#endif
+#if IS_ENABLED(CONFIG_CRYPTO_842)
+       "842",
 #endif
        NULL
 };