From: Petr Vorel <petr.vorel@gmail.com>
To: Eugeniu Rosca <roscaeugeniu@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>,
Ulf Magnusson <ulfalizer@gmail.com>,
Nicolas Pitre <nicolas.pitre@linaro.org>,
Randy Dunlap <rdunlap@infradead.org>,
Paul Bolle <pebolle@tiscali.nl>,
Eugeniu Rosca <erosca@de.adit-jv.com>,
linux-kbuild@vger.kernel.org,
Eugeniu Rosca <rosca.eugeniu@gmail.com>
Subject: Re: [PATCH 2/2] kconfig: Print the value of each reverse dependency
Date: Wed, 14 Feb 2018 01:46:27 +0100 [thread overview]
Message-ID: <20180214004626.GB1154@x230> (raw)
In-Reply-To: <20180213005610.10575-2-rosca.eugeniu@gmail.com>
Hi Eugeniu,
> From: Eugeniu Rosca <erosca@de.adit-jv.com>
> Assuming commit 617aebe6a97e ("Merge tag 'usercopy-v4.16-rc1' of
> git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux"), ARCH=arm64
> and vanilla arm64 defconfig, here is the top 10 CONFIG options with
> the highest amount of OR sub-expressions that make up the final
> "{Selected,Implied} by" reverse dependency expression.
> | Config | Revdep all | Revdep ![=n] |
> |-------------------------------|------------|--------------|
> | REGMAP_I2C | 212 | 9 |
> | CRC32 | 167 | 25 |
> | FW_LOADER | 128 | 5 |
> | MFD_CORE | 124 | 9 |
> | FB_CFB_IMAGEBLIT | 114 | 2 |
> | FB_CFB_COPYAREA | 111 | 2 |
> | FB_CFB_FILLRECT | 110 | 2 |
> | SND_PCM | 103 | 2 |
> | CRYPTO_HASH | 87 | 19 |
> | WATCHDOG_CORE | 86 | 6 |
> The story behind the above table is that the user needs to visually
> review/evaluate 212 expressions which *potentially* select REGMAP_I2C
> in order to identify the expressions which *actually* select REGMAP_I2C,
> for a particular ARCH and for a particular defconfig used.
> To make this experience smoother, transform the way reverse dependencies
> are displayed to the user from [1] to [2].
> [1] Before this commit
> Symbol: MTD_BLKDEVS [=y]
> ...
> Selected by:
> - MTD_BLOCK [=y] && MTD [=y] && BLOCK [=y]
> - MTD_BLOCK_RO [=n] && MTD [=y] && MTD_BLOCK [=y]!=y && BLOCK [=y]
> - FTL [=n] && MTD [=y] && BLOCK [=y]
> - NFTL [=n] && MTD [=y] && BLOCK [=y]
> - INFTL [=n] && MTD [=y] && BLOCK [=y]
> - RFD_FTL [=n] && MTD [=y] && BLOCK [=y]
> - SSFDC [=n] && MTD [=y] && BLOCK [=y]
> - SM_FTL [=n] && MTD [=y] && BLOCK [=y]
> - MTD_SWAP [=n] && MTD [=y] && SWAP [=y]
> [2] After this commit
> Symbol: MTD_BLKDEVS [=y]
> ...
> Selected by:
> - [y] MTD_BLOCK [=y] && MTD [=y] && BLOCK [=y]
> - [ ] MTD_BLOCK_RO [=n] && MTD [=y] && MTD_BLOCK [=y]!=y && BLOCK [=y]
> - [ ] FTL [=n] && MTD [=y] && BLOCK [=y]
> - [ ] NFTL [=n] && MTD [=y] && BLOCK [=y]
> - [ ] INFTL [=n] && MTD [=y] && BLOCK [=y]
> - [ ] RFD_FTL [=n] && MTD [=y] && BLOCK [=y]
> - [ ] SSFDC [=n] && MTD [=y] && BLOCK [=y]
> - [ ] SM_FTL [=n] && MTD [=y] && BLOCK [=y]
> - [ ] MTD_SWAP [=n] && MTD [=y] && SWAP [=y]
Note, Masahiro suggested to have ':' after first expression [1]:
Selected by:
[y]: EEPROM_AT24 [=y] && I2C [=y] && SYSFS [=y]
[ ]: NET_DSA_SMSC_LAN9303_I2C [=n] && NETDEVICES [=y] &&
HAVE_NET_DSA [=y] && NET_DSA [=n] && I2C [=y]
...
I think it's better, it's clearer that the expression is for whole line.
Kind regards,
Petr
[1]: https://marc.info/?l=linux-kbuild&m=151791725709825&w=4
next prev parent reply other threads:[~2018-02-14 0:46 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-13 0:56 [PATCH 1/2] kconfig: Print reverse dependencies on new line consistently Eugeniu Rosca
2018-02-13 0:56 ` [PATCH 2/2] kconfig: Print the value of each reverse dependency Eugeniu Rosca
2018-02-13 6:18 ` Ulf Magnusson
2018-02-13 23:54 ` Eugeniu Rosca
2018-02-14 0:41 ` Petr Vorel
2018-02-17 17:26 ` Eugeniu Rosca
2018-02-14 4:09 ` Ulf Magnusson
2018-02-17 17:20 ` Eugeniu Rosca
2018-02-17 17:31 ` Ulf Magnusson
2018-02-18 11:34 ` Eugeniu Rosca
2018-02-14 0:46 ` Petr Vorel [this message]
2018-02-13 6:11 ` [PATCH 1/2] kconfig: Print reverse dependencies on new line consistently Ulf Magnusson
2018-02-13 6:40 ` Petr Vorel
2018-02-14 0:32 ` Eugeniu Rosca
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