Re: [PATCH 1/4] s390/percpu: Use asm_inline for arch_this_cpu_add()

[Alexander Gordeev <agordeev@linux.ibm.com>]

On Mon, Oct 12, 2026 at 01:42:46PM +0200, Heiko Carstens wrote:
> When converting to preemptible percpu operations the arch_this_cpu_add()
> inline assemblies were not converted to use asm_inline instead of a plain
> asm statement.
> 
> With all the macro usage the inline assemblies grow significantly, and
> the compiler may decide to not inline even small functions. This can be
> observed with gcc16 and a defconfig build where many calls to
> __srcu_read_lock_fast() are not inlined anymore, even though it is
> basically only a this_cpu_inc().
> 
> Use asm_inline to address this.
> 
> Fixes: 18ec6c5d7ec6 ("s390/percpu: Use new percpu code section for arch_this_cpu_add()")
> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
> ---
>  arch/s390/include/asm/percpu.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>