Can we keep this in linux/pmem.h? I'm pretty sure the stubs would need
it as well, and even if they don't it'll keep the includes consistent.
+ size_t len;
+ len = copy_from_iter_nocache((void __force *)addr, bytes, i);
+ * copy_from_iter_nocache() on x86 only uses non-temporal stores for
+ * iovec iterators, so for other types (bvec & kvec) we must do a
+ * cache write-back.
Shouldn't we fi that?
+ if (iter_is_iovec(i) == false)
+ __arch_wb_cache_pmem(addr, bytes);
And if not and iter_needs_pmem_wb helper to encode this knowledge would
+static inline void arch_clear_pmem(void __pmem *addr, size_t size)
+ /* TODO: implement the zeroing via non-temporal writes */
+ if (size == PAGE_SIZE && ((unsigned long)addr & ~PAGE_MASK) == 0)
+ clear_page((void __force *)addr);
+ memset((void __force *)addr, 0, size);
+ __arch_wb_cache_pmem(addr, size);
Please add a local vaiable so that the __force casting is only needed
once. Same for other functions with this pattern.