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Groups > linux.kernel > #1640977 > unrolled thread

[PATCH linux-next] device-dax: fix BLOCK dependency

Started byFabian Frederick <fabf@skynet.be>
First post2017-05-13 21:10 +0200
Last post2017-05-14 01:30 +0200
Articles 2 — 2 participants

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  [PATCH linux-next] device-dax: fix BLOCK dependency Fabian Frederick <fabf@skynet.be> - 2017-05-13 21:10 +0200
    Re: [PATCH linux-next] device-dax: fix BLOCK dependency Dan Williams <dan.j.williams@intel.com> - 2017-05-14 01:30 +0200

#1640977 — [PATCH linux-next] device-dax: fix BLOCK dependency

FromFabian Frederick <fabf@skynet.be>
Date2017-05-13 21:10 +0200
Subject[PATCH linux-next] device-dax: fix BLOCK dependency
Message-ID<tGKAp-7Ln-1@gated-at.bofh.it>
commit ef51042472f5 ("block, dax: move "select DAX" from BLOCK to FS_DAX")
uses get_start_sect() which requires CONFIG_BLOCK

make allnoconfig + dax gives the following:

drivers/dax/super.c: In function 'bdev_dax_pgoff':
drivers/dax/super.c:50:26: error: implicit declaration of function
'get_start_sect' [-Werror=implicit-function-declaration]

Signed-off-by: Fabian Frederick <fabf@skynet.be>
---
 drivers/dax/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dax/Kconfig b/drivers/dax/Kconfig
index b79aa8f..1806628 100644
--- a/drivers/dax/Kconfig
+++ b/drivers/dax/Kconfig
@@ -1,5 +1,6 @@
 menuconfig DAX
 	tristate "DAX: direct access to differentiated memory"
+	depends on BLOCK
 	select SRCU
 	default m if NVDIMM_DAX
 
-- 
2.9.3

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#1641032

FromDan Williams <dan.j.williams@intel.com>
Date2017-05-14 01:30 +0200
Message-ID<tGOE1-1ZD-1@gated-at.bofh.it>
In reply to#1640977
On Sat, May 13, 2017 at 11:59 AM, Fabian Frederick <fabf@skynet.be> wrote:
> commit ef51042472f5 ("block, dax: move "select DAX" from BLOCK to FS_DAX")
> uses get_start_sect() which requires CONFIG_BLOCK
>
> make allnoconfig + dax gives the following:
>
> drivers/dax/super.c: In function 'bdev_dax_pgoff':
> drivers/dax/super.c:50:26: error: implicit declaration of function
> 'get_start_sect' [-Werror=implicit-function-declaration]
>

Ah, sorry for this breakage, I guess this is a config that kbuild does
not attempt. I'll fix this up by not compiling the block-related
helpers in the BLOCK=n case.

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