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kconfig-language.txt: remove bogus hint 

For the use case the hint describe a simple dependency is
enough.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
This commit is contained in:
Adrian Bunk 2008-05-04 02:15:35 +03:00 committed by Sam Ravnborg
parent c4143a8303
commit 2cb1e1257f
1 changed files with 0 additions and 24 deletions
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Documentation/kbuild/kconfig-language.txt
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@ -377,27 +377,3 @@ config FOO
limits FOO to module (=m) or disabled (=n).
Build limited by a third config symbol which may be =y or =m
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A common idiom that we see (and sometimes have problems with) is this:
When option C in B (module or subsystem) uses interfaces from A (module
or subsystem), and both A and B are tristate (could be =y or =m if they
were independent of each other, but they aren't), then we need to limit
C such that it cannot be built statically if A is built as a loadable
module. (C already depends on B, so there is no dependency issue to
take care of here.)
If A is linked statically into the kernel image, C can be built
statically or as loadable module(s). However, if A is built as loadable
module(s), then C must be restricted to loadable module(s) also. This
can be expressed in kconfig language as:
config C
depends on A = y || A = B
or for real examples, use this command in a kernel tree:
$ find . -name Kconfig\* | xargs grep -ns "depends on.*=.*||.*=" | grep -v orig