3.19-stable review patch. If anyone has any objections, please let me know.
------------------ From: Jan Stancek <jstan...@redhat.com> commit d52356e7f48e400ca258c6763a232a92fa82ff68 upstream. Space allocated for paca is based off nr_cpu_ids, but pnv_alloc_idle_core_states() iterates paca with cpu_nr_cores()*threads_per_core, which is using NR_CPUS. This causes pnv_alloc_idle_core_states() to write over memory, which is outside of paca array and may later lead to various panics. Fixes: 7cba160ad789 (powernv/cpuidle: Redesign idle states management) Signed-off-by: Jan Stancek <jstan...@redhat.com> Signed-off-by: Michael Ellerman <m...@ellerman.id.au> Signed-off-by: Preet U. Murthy <pre...@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- arch/powerpc/include/asm/cputhreads.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/powerpc/include/asm/cputhreads.h +++ b/arch/powerpc/include/asm/cputhreads.h @@ -55,7 +55,7 @@ static inline cpumask_t cpu_thread_mask_ static inline int cpu_nr_cores(void) { - return NR_CPUS >> threads_shift; + return nr_cpu_ids >> threads_shift; } static inline cpumask_t cpu_online_cores_map(void) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/