Re: [PATCH v2 16/17] selftests: vdso: Make VDSO function call more generic

On Thu, Aug 22, 2024 at 09:13:24AM +0200, Christophe Leroy wrote:

On powerpc, a call to a VDSO function is not a standard C function call. Unlike x86 that returns a negated error code in case of an error, powerpc sets CR[SO] and returns the error code as a positive value.

So use a macro called VDSO_CALL() which takes a pointer to the function to call, the number of arguments and the arguments.

You'll probably want to move to VDSO_CALL() for the whole test suite, not just the getrandom one, right?