From: Andrew Morton <akpm@osdl.org>

Randy points out:

> I have a (randconfig) build of 2.6.19-rc5-mm2 with:
> 
> CONFIG_DEBUG_READAHEAD=y
> 
> which selects DEBUG_FS, so DEBUG_FS=y, but DEBUG_FS depends on
> SYSFS, and SYSFS is not set in the randconfig.
> 
> This randconfig causes this build error:
> 
> fs/built-in.o: In function `debugfs_init':
> inode.c:(.init.text+0xdb2): undefined reference to `kernel_subsys'
> 

`select' is evil.  Kill.

Cc: Wu Fengguang <wfg@mail.ustc.edu.cn>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 mm/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN mm/Kconfig~readahead-kconfig-options-fix mm/Kconfig
--- a/mm/Kconfig~readahead-kconfig-options-fix
+++ a/mm/Kconfig
@@ -196,7 +196,7 @@ config DEBUG_READAHEAD
 	bool "Readahead debug and accounting"
 	default n
 	depends on ADAPTIVE_READAHEAD
-	select DEBUG_FS
+	depends on DEBUG_FS
 	help
 	  This option injects extra code to dump detailed debug traces and do
 	  readahead events accounting.
_