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Date: Sun, 5 May 2024 14:13:05 +0900
From: Sergey Senozhatsky <senozhatsky@chromium.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: kernel test robot <lkp@intel.com>, Minchan Kim <minchan@kernel.org>,
	llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
	Linux Memory Management List <linux-mm@kvack.org>,
	linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
	Sergey Senozhatsky <senozhatsky@chromium.org>
Subject: Re: [PATCH 08/14] zram: check that backends array has at least one
 backend
Message-ID: <20240505051305.GB8623@google.com>
References: <20240503091823.3616962-9-senozhatsky@chromium.org>
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On (24/05/05 13:39), Sergey Senozhatsky wrote:
[..]
> > I guess just pick one if none were selected.

How do I pick one if none were selected? Does Kconfig support
something like that?

> : config ZRAM
> :        tristate "Compressed RAM block device support"
> :        depends on BLOCK && SYSFS && MMU
> :        select ZSMALLOC
> :        depends on (LZO_COMPRESS && LZO_DECOMPRESS) || \
> :                (LZ4_COMPRESS && LZ4_DECOMPRESS) || \
> :                (LZ4HC_COMPRESS && LZ4_DECOMPRESS) || \
> :                (ZSTD_COMPRESS && ZSTD_DECOMPRESS) || \
> :                (ZLIB_DEFLATE && ZLIB_INFLATE)

The problem I'm having with this is that FOO_COMPRESS can be M while
zram needs Y.