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authorRichard Weinberger <richard@nod.at>2016-08-02 14:03:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-02 17:31:41 -0400
commitbc083a64b6c035135c0f80718f9e9192cc0867c6 (patch)
treeb60f7be18e0793f100cd41bb008f3e5e10cfa22b /init
parentca52953f5f24aff0aa8fa8de750b76ba0302142d (diff)
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init/Kconfig: make COMPILE_TEST depend on !UML
UML is a bit special since it does not have iomem nor dma. That means a lot of drivers will not build if they miss a dependency on HAS_IOMEM. s390 used to have the same issues but since it gained PCI support UML is the only stranger. We are tired of patching dozens of new drivers after every merge window just to un-break allmod/yesconfig UML builds. One could argue that a decent driver has to know on what it depends and therefore a missing HAS_IOMEM dependency is a clear driver bug. But the dependency not obvious and not everyone does UML builds with COMPILE_TEST enabled when developing a device driver. A possible solution to make these builds succeed on UML would be providing stub functions for ioremap() and friends which fail upon runtime. Another one is simply disabling COMPILE_TEST for UML. Since it is the least hassle and does not force use to fake iomem support let's do the latter. Link: http://lkml.kernel.org/r/1466152995-28367-1-git-send-email-richard@nod.at Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 79c6aad..8f08f49 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -55,6 +55,7 @@ config CROSS_COMPILE
config COMPILE_TEST
bool "Compile also drivers which will not load"
+ depends on !UML
default n
help
Some drivers can be compiled on a different platform than they are
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