Instead of relying on kernel version to determine if certain functions
or structure are present in the kernel, use the conftest.sh script to
test which functions, structures, etc are present at compile time. This
is beneficial for working with 3rd party Linux kernels that may have
back-ported upstream changes into their kernel and so the kernel version
checks do not work.
Bug 4119327
Change-Id: If315b18af74c830e9ba3993208de3a3326c4187d
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2984415
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
BMI088 driver was failing to build for Kernel version
> 6.2 and the following error is seen:
drivers/bmi088/bmi088_core.c:1043:42: error: 'struct iio_dev'
has no member named 'mlock'
mutex_lock(&st->snsrs[hw].bmi_iio->mlock);
mlock field is moved from indio_dev to iio_dev_opaque
structure from v6.2 onwards. Instead of using kernel
version, use conftest.sh script which checks for the
'mlock' field in iio_dev_opaque structure or not.
Bug 4190630
Change-Id: Icc540edd916718d30460b314600c20e70144b1d6
Signed-off-by: Gautham Srinivasan <gauthams@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2983266
Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com>
Tested-by: Jonathan Hunter <jonathanh@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
The max77851 driver is failing to build for Linux kernels v5.16 to v6.0
and the following error is seen ...
drivers/thermal/max77851_thermal.c:173:30: error: implicit declaration
of function 'devm_thermal_of_zone_register'; did you mean
'devm_thermal_zone_of_sensor_register'?
[-Werror=implicit-function-declaration]
thermal->tz_device = devm_thermal_of_zone_register(&pdev->dev, 0,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The function devm_thermal_of_zone_register() was introduced in Linux
kernel v6.1 and not v5.16.
Instead of relying on kernel version to determine if this function is
present using the conftest.sh script which checks the kernel that is
being compiled to see if this function is present or not. This is also
beneficial for working with 3rd party Linux kernels that may have
back-ported upstream changes into their kernel and so the kernel version
checks do not work either.
Bug 200749982
Change-Id: I8d5e70d2d39497d7f513c82cd3a45312b2bc016a
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2980925
The script conftest.sh can be used at build time to determine which
kernel headers or versions of kernel functions/macros are present in the
kernel that drivers are being compiled against. This is useful for cases
where changes are backported from upstream Linux kernels that may change
kernel functions and so we can no longer rely on the kernel version to
indicate which version of the kernel function to use.
The conftest.h header file is a top-level header file that includes all
the header files that are generated by the conftest.sh script. This
header file can be included by drivers so that they can use the various
definitions that are generated by conftest.sh. This file is located
along with the conftest.sh script because this is copied to the output
directory where all the generated header files are placed.
Bug 4119327
Bug 4228080
Change-Id: I781884e359e9688640661548620e01a178debac9
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2974065
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
