Hi Yishai,
On 10/30/24 3:54 PM, Yishai Jaffe via Lists.Yoctoproject.Org wrote:
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Thanks Quentin,
Changing the include to uapi/linux/sched/types.h solved the issue.
But just so I'm clear on this - Can you explain when I should use uapi headers
vs when to use the regular linux/xxx headers?
You should include the header where the structure is defined.
The "issue" in Yocto is that the headers aren't coming from your kernel
sources but from a generic linux kernel header recipe, and this is made
on purpose. The generic linux kernel header recipe is at 6.6 in
Scarthgap. Styhead has 6.10. The structure is defined in a different
header in 6.6 and in 6.7+ (including 6.10), so your out-of-tree module
needs the path from 6.6 in order to compile in Scarthgap, but will need
another path from 6.7+ in order to compile in Styhead.
You can handle that via #if in your code, if you need the exact same
source code to build on different Yocto/kernel versions. That is the
cross to bear when one develops out of tree kernel modules sadly.
Cheers,
Quentin
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