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2016-03-02selftests/powerpc: Fix out of bounds access in TM signal testMichael Ellerman
Gcc helpfully points out that we're accessing past the end of the gprs array: tm-signal-msr-resv.c: In function 'signal_usr1': tm-signal-msr-resv.c:43:37: error: array subscript is above array bounds [-Werror=array-bounds] ucp->uc_mcontext.regs->gpr[PT_MSR] |= (7ULL); We haven't noticed previously because -flto was hiding it somehow. The code is confused, PT_MSR isn't a gpr, instead it's in uc_regs->gregs, so fix it. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-12-14selftests/powerpc: Add TM signal return testMichael Neuling
Test the kernel's signal return code to ensure that it doesn't crash when both the transactional and suspend MSR bits are set in the signal context. Signed-off-by: Michael Neuling <mikey@neuling.org> Tested-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> [mpe: Skip if we don't have TM] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>