ARM: 9442/1: smp: Fix IPI alignment in /proc/interrupts

On a system with less than 1000 interrupts, prec = 3, causing a
misalignment for the IPI interrupts.  E.g. on Koelsch (R-Car M2-W):

    200:          0          0  gpio-rcar   6 Edge      SW36
    IPI0:          0          0  CPU wakeup interrupts
    IPI1:          0          0  Timer broadcast interrupts
    IPI2:       1701       2844  Rescheduling interrupts
    IPI3:      10338      21181  Function call interrupts
    IPI4:          0          0  CPU stop interrupts
    IPI5:        651        825  IRQ work interrupts
    IPI6:          0          0  completion interrupts
    Err:          0

Fix this by adopting the same solution as used on arm64.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 3431c0553f45cdf5f0b1b8dbb59bf38003da9995..50999886a8b5cbab82ca9ed83cc36a6b1f6d7e07 100644 (file)
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -551,7 +551,8 @@ void show_ipi_list(struct seq_file *p, int prec)
                if (!ipi_desc[i])
                        continue;
 
-               seq_printf(p, "%*s%u: ", prec - 1, "IPI", i);
+               seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i,
+                          prec >= 4 ? " " : "");
 
                for_each_online_cpu(cpu)
                        seq_printf(p, "%10u ", irq_desc_kstat_cpu(ipi_desc[i], cpu));