On Mon, Apr 08, 2019 at 11:26:20PM +0200, Arnd Bergmann wrote:
> clang points out that the declaration of cio_irb does not match the
> definition exactly, it is missing the alignment attribute:
>
> ../drivers/s390/cio/cio.c:50:1: warning: section does not match previous declaration [-Wsection]
> DEFINE_PER_CPU_ALIGNED(struct irb, cio_irb);
> ^
> ../include/linux/percpu-defs.h:150:2: note: expanded from macro 'DEFINE_PER_CPU_ALIGNED'
> DEFINE_PER_CPU_SECTION(type, name, PER_CPU_ALIGNED_SECTION) \
> ^
> ../include/linux/percpu-defs.h:93:9: note: expanded from macro 'DEFINE_PER_CPU_SECTION'
> extern __PCPU_ATTRS(sec) __typeof__(type) name; \
> ^
> ../include/linux/percpu-defs.h:49:26: note: expanded from macro '__PCPU_ATTRS'
> __percpu __attribute__((section(PER_CPU_BASE_SECTION sec))) \
> ^
> ../drivers/s390/cio/cio.h:118:1: note: previous attribute is here
> DECLARE_PER_CPU(struct irb, cio_irb);
> ^
> ../include/linux/percpu-defs.h:111:2: note: expanded from macro 'DECLARE_PER_CPU'
> DECLARE_PER_CPU_SECTION(type, name, "")
> ^
> ../include/linux/percpu-defs.h:87:9: note: expanded from macro 'DECLARE_PER_CPU_SECTION'
> extern __PCPU_ATTRS(sec) __typeof__(type) name
> ^
> ../include/linux/percpu-defs.h:49:26: note: expanded from macro '__PCPU_ATTRS'
> __percpu __attribute__((section(PER_CPU_BASE_SECTION sec))) \
> ^
> Use DECLARE_PER_CPU_ALIGNED() here, to make the two match.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Reviewed-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
> ---
> drivers/s390/cio/cio.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h
> index 9811fd8a0c73..92eabbb5f18d 100644
> --- a/drivers/s390/cio/cio.h
> +++ b/drivers/s390/cio/cio.h
> @@ -115,7 +115,7 @@ struct subchannel {
> struct schib_config config;
> } __attribute__ ((aligned(8)));
>
> -DECLARE_PER_CPU(struct irb, cio_irb);
> +DECLARE_PER_CPU_ALIGNED(struct irb, cio_irb);
>
> #define to_subchannel(n) container_of(n, struct subchannel, dev)
>
> --
> 2.20.0
>
