4.2.8-ckt12 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------ From: "Naveen N. Rao" <[email protected]> commit f47822078dece7189cad0a5f472f148e5e916736 upstream. On some architectures (powerpc in particular), the number of registers exceeds what can be represented in an integer bitmask. Ensure we generate the proper bitmask on such platforms. Fixes: 71ad0f5e4 ("perf tools: Support for DWARF CFI unwinding on post processing") Signed-off-by: Naveen N. Rao <[email protected]> Acked-by: Arnaldo Carvalho de Melo <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Signed-off-by: Kamal Mostafa <[email protected]> --- tools/perf/util/perf_regs.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c index 43168fb..2fb6f2a 100644 --- a/tools/perf/util/perf_regs.c +++ b/tools/perf/util/perf_regs.c @@ -7,18 +7,18 @@ int perf_reg_value(u64 *valp, struct regs_dump *regs, int id) int i, idx = 0; u64 mask = regs->mask; - if (regs->cache_mask & (1 << id)) + if (regs->cache_mask & (1ULL << id)) goto out; - if (!(mask & (1 << id))) + if (!(mask & (1ULL << id))) return -EINVAL; for (i = 0; i < id; i++) { - if (mask & (1 << i)) + if (mask & (1ULL << i)) idx++; } - regs->cache_mask |= (1 << id); + regs->cache_mask |= (1ULL << id); regs->cache_regs[id] = regs->regs[idx]; out: -- 2.7.4
