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authorYann E. MORIN <yann.morin.1998@free.fr>2013-08-06 18:45:07 +0200
committerYann E. MORIN <yann.morin.1998@free.fr>2013-08-15 22:48:08 +0200
commit04b19b773a60d201bc1b187ba7a7c86dc237a27b (patch)
tree258777513e409ba42fe9b592461bfa05504dd24c /init
parent83e8b90e1d2cc5ff5d2443f2486c2d786a4997ce (diff)
downloadlinux-04b19b773a60d201bc1b187ba7a7c86dc237a27b.tar.bz2
kconfig: silence warning when parsing auto.conf when a symbol has changed type
When a symbol changes type from tristate to bool, and was previously set to 'm', a subsequent silentoldconfig would warn about inconsistency, such as: include/config/auto.conf:3014:warning: symbol value 'm' invalid for HOTPLUG_PCI_PCIE Seen by Linus with the merge in aa8032b (sequence to reproduce by Michal): git checkout 1fe0135 make mrproper make allmodconfig make silentoldconfig git checkout aa8032b make allmodconfig make silentoldconfig Since HOTPLUG_PCI_PCIE changed from tristate to bool in aa8032b, it was previously set to 'm' in auto.conf by the first allmodconfig+silentoldconfig, but then was set to 'y' by the second allmodconfig. Then the second silentoldconfig prints the warning. The warning in this case is a spurious warning, which happens at the time kconfig tries to detect symbols that have changed, to touch the empty header files in include/config used for dependency-tracking by make. Silence the warning when we read the old auto.conf file, since it is perfectly legit that a symbol changed type since the previous call. Thread in: http://marc.info/?l=linux-pci&m=137569198904000&w=2 Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Marek <mmarek@suse.cz> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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