From: Paul E. McKenney Date: Thu, 6 Mar 2014 19:09:10 +0000 (-0800) Subject: rcu: Print negatives for stall-warning counter wraparound X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=83ebe63ead0fe60e4b548730800cb68293ce098b;p=linux-beck.git rcu: Print negatives for stall-warning counter wraparound The print_other_cpu_stall() and print_cpu_stall() functions print grace-period numbers using an unsigned format, which means that the number one less than zero is a very large number. This commit therefore causes these numbers to be printed with a signed format in order to improve readability of the RCU CPU stall-warning output. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett --- diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 2c53ac924cab..b33c29a99df3 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -932,9 +932,9 @@ static void print_other_cpu_stall(struct rcu_state *rsp) print_cpu_stall_info_end(); for_each_possible_cpu(cpu) totqlen += per_cpu_ptr(rsp->rda, cpu)->qlen; - pr_cont("(detected by %d, t=%ld jiffies, g=%lu, c=%lu, q=%lu)\n", + pr_cont("(detected by %d, t=%ld jiffies, g=%ld, c=%ld, q=%lu)\n", smp_processor_id(), (long)(jiffies - rsp->gp_start), - rsp->gpnum, rsp->completed, totqlen); + (long)rsp->gpnum, (long)rsp->completed, totqlen); if (ndetected == 0) pr_err("INFO: Stall ended before state dump start\n"); else if (!trigger_all_cpu_backtrace()) @@ -971,8 +971,9 @@ static void print_cpu_stall(struct rcu_state *rsp) print_cpu_stall_info_end(); for_each_possible_cpu(cpu) totqlen += per_cpu_ptr(rsp->rda, cpu)->qlen; - pr_cont(" (t=%lu jiffies g=%lu c=%lu q=%lu)\n", - jiffies - rsp->gp_start, rsp->gpnum, rsp->completed, totqlen); + pr_cont(" (t=%lu jiffies g=%ld c=%ld q=%lu)\n", + jiffies - rsp->gp_start, + (long)rsp->gpnum, (long)rsp->completed, totqlen); if (!trigger_all_cpu_backtrace()) dump_stack();