Changes in v2: - Remove the now-unused out_free_domain error label in the xive patch after deleting the unreachable NULL check goto. - Fix a use-after-free of xive_ipis: when xive_init_ipis() fails, the error path frees xive_ipis but xive_smp_probe() ignores the error and proceeds to dereference it in xive_setup_cpu_ipi(). Propagate the error return through xive_smp_probe() and check it in both pnv_smp_probe() and pSeries_smp_probe().
This is a code cleanup series that removes unreachable NULL checks (and associated error handling) that follow allocations using __GFP_NOFAIL, which guarantees non-NULL return. Gou Hao (6): powerpc/xive: remove dead NULL check after GFP_NOFAIL allocation powerpc/xive: add error return value to xive_smp_probe() powerpc/xive: fix use-after-free of xive_ipis drm: remove dead WARN_ON NULL check after GFP_NOFAIL allocation lib/test_hmm: remove dead NULL checks after GFP_NOFAIL allocations RDMA/cxgb4: remove dead NULL checks after GFP_NOFAIL allocations arch/powerpc/include/asm/xive.h | 4 ++-- arch/powerpc/platforms/powernv/smp.c | 8 +++++--- arch/powerpc/platforms/pseries/smp.c | 8 +++++--- arch/powerpc/sysdev/xive/common.c | 15 +++++++++------ drivers/gpu/drm/drm_modeset_lock.c | 4 ---- drivers/infiniband/hw/cxgb4/mem.c | 10 ++-------- lib/test_hmm.c | 6 ------ 7 files changed, 23 insertions(+), 32 deletions(-) -- 2.20.1
