Add a warn_once to warn if the CPU target is not found. This could help to find about any such usecase.
This is a very rare case, which either means mask was empty or atomic update failed for all online CPUs. So it is worth printing that path for potential fix. Signed-off-by: Shrikanth Hegde <[email protected]> --- arch/powerpc/sysdev/xive/common.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index c120be73d149..dadd1f46ec93 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -564,6 +564,7 @@ static int xive_find_target_in_mask(const struct cpumask *mask, return cpu; } + WARN_ONCE(1, "target CPU not found in mask: %*pbl\n", cpumask_pr_args(mask)); return -1; } -- 2.47.3
