On Tue, 19 Mar 2019 15:52:25 +0000,
Masahiro Yamada <yamada.masah...@socionext.com> wrote:
>
> Since commit e7273ff49acf ("ARM: 8488/1: Make IPI_CPU_BACKTRACE a
> "non-secure" SGI"), IPI_CPU_BACKTRACE is assigned to SGI7.
>
> raise_nmi() passes IPI_CPU_BACKTRACE (=7) into smp_cross_call(),
> but it is above the array bound of ipi_types[].
>
> Increase NR_IPI, and add the entry to ipi_types[].
>
> This fixes the following GCC warning:
>
> CC arch/arm/kernel/smp.o
> arch/arm/kernel/smp.c: In function 'raise_nmi':
> arch/arm/kernel/smp.c:522:2: warning: array subscript 7 is above array bounds
> of 'const char *[7]' [-Warray-bounds]
> trace_ipi_raise_rcuidle(target, ipi_types[ipinr]);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
> ---
+Arnd.
A fix for this has been around since 2016:
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-February/409393.html
and reposted several times since. I don't know why it hasn't been
picked up.
M.
--
Jazz is not dead, it just smell funny.
