drivers/staging: make android tegra_ion.c properly tristate
The Kconfig currently controlling compilation of this code is: drivers/staging/android/ion/Kconfig:config ION_TEGRA drivers/staging/android/ion/Kconfig: tristate "Ion for Tegra" ...which led me to incorrectly conclude this file was built modular earlier. However the above CONFIG is just used to enter the dir and once we do enter that dir, we see the build is unconditional: drivers/staging/android/ion/Makefile:obj-$(CONFIG_ION_TEGRA) += tegra/ drivers/staging/android/ion/tegra/Makefile:obj-y += tegra_ion.o ...meaning that it currently is not being built as a module by anyone. However, given that the Kconfig did explicitly choose tristate, and that the dummy ion driver is (functionally) tristate, I chose to make the Makefile do the right thing for it to build as a module. After this change, on an ARM allmodconfig, we see: CC [M] drivers/staging/android/ion/tegra/tegra_ion.o so it does build OK as a module. I can't vouch for the modular functionality however, so consider this compile tested only. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Arve Hjønnevåg" <arve@android.com> Cc: Riley Andrews <riandrews@android.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Markus Elfring <elfring@users.sourceforge.net> Cc: devel@driverdev.osuosl.org Cc: linux-tegra@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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obj-y += tegra_ion.o
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obj-$(CONFIG_ION_TEGRA) += tegra_ion.o
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