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kconfig: make allnoconfig disable options behind EMBEDDED and EXPERT

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"make allnoconfig" exists to ease testing of minimal configurations.
Documentation/SubmitChecklist includes a note to test with allnoconfig.
This helps catch missing dependencies on common-but-not-required
functionality, which might otherwise go unnoticed.

However, allnoconfig still leaves many symbols enabled, because they're
hidden behind CONFIG_EMBEDDED or CONFIG_EXPERT.  For instance, allnoconfig
still has CONFIG_PRINTK and CONFIG_BLOCK enabled, so drivers don't
typically get build-tested with those disabled.

To address this, introduce a new Kconfig option "allnoconfig_y", used on
symbols which only exist to hide other symbols.  Set it on CONFIG_EMBEDDED
(which then selects CONFIG_EXPERT).  allnoconfig will then disable all the
symbols hidden behind those.

Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Tested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Josh Triplett 2014-04-07 15:39:09 -07:00 • committed by Linus Torvalds
parent 527518f1a9
commit 5d2acfc7b9
8 changed files with 25 additions and 6 deletions
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3
scripts/kconfig/expr.h
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@ -109,6 +109,9 @@ struct symbol {
/* choice values need to be set before calculating this symbol value */
#define SYMBOL_NEED_SET_CHOICE_VALUES 0x100000
/* Set symbol to y if allnoconfig; used for symbols that hide others */
#define SYMBOL_ALLNOCONFIG_Y 0x200000
#define SYMBOL_MAXLENGTH 256
#define SYMBOL_HASHSIZE 9973