Christopher Lameter <c...@linux.com> writes: > On Wed, 2 Aug 2017, Huang, Ying wrote: > >> --- a/include/linux/percpu.h >> +++ b/include/linux/percpu.h >> @@ -129,5 +129,8 @@ extern phys_addr_t per_cpu_ptr_to_phys(void *addr); >> #define alloc_percpu(type) \ >> (typeof(type) __percpu *)__alloc_percpu(sizeof(type), \ >> __alignof__(type)) >> +#define alloc_percpu_aligned(type) \ >> + ((typeof(type) __percpu *)__alloc_percpu(sizeof(type), \ >> + max_t(unsigned int, cache_line_size(), __alignof__(type)))) >> >> #endif /* __LINUX_PERCPU_H */ > > This is not needeed since alloc_percpu() already uses __alignof__(type). > > If you add an attribute to the definition of "type" that requires > cacheline alignmet (f.e. __cacheline_aligned) then alloc_percpu() will > align the allocation as you desire.
OK. Best Regards, Huang, Ying
