[PATCH v2 2/3] powerpc: Show PAGE_SIZE in __die() output

[Christophe Leroy]

Le 10/01/2019 à 12:57, Michael Ellerman a écrit :
> The page size the kernel is built with is useful info when debugging a
> crash, so add it to the output in __die().
> 
> Result looks like eg:
> 
>    kernel BUG at drivers/misc/lkdtm/bugs.c:63!
>    Oops: Exception in kernel mode, sig: 5 [#1]
>    LE PAGE_SIZE=64K SMP NR_CPUS=2048 NUMA pSeries
>    Modules linked in: vmx_crypto kvm binfmt_misc ip_tables
> 
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>

Reviewed-by: Christophe Leroy <christophe.leroy at c-s.fr>


> ---
>   arch/powerpc/kernel/traps.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> v2: Adapt to single printk.
> 
> diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
> index 164fc92895be..a872c64618ad 100644
> --- a/arch/powerpc/kernel/traps.c
> +++ b/arch/powerpc/kernel/traps.c
> @@ -257,8 +257,9 @@ static int __die(const char *str, struct pt_regs *regs, long err)
>   {
>   	printk("Oops: %s, sig: %ld [#%d]\n", str, err, ++die_counter);
>   
> -	printk("%s %s%s%s%s%s %s\n",
> +	printk("%s PAGE_SIZE=%luK%s%s%s%s%s %s\n",
>   	       IS_ENABLED(CONFIG_CPU_LITTLE_ENDIAN) ? "LE" : "BE",
> +	       PAGE_SIZE / 1024,
>   	       IS_ENABLED(CONFIG_PREEMPT) ? " PREEMPT" : "",
>   	       IS_ENABLED(CONFIG_SMP) ? " SMP" : "",
>   	       IS_ENABLED(CONFIG_SMP) ? (" NR_CPUS=" __stringify(NR_CPUS)) : "",
>