On 04/21/2017 02:56 AM, Sreekanth Reddy wrote: > On Thu, Apr 20, 2017 at 7:58 AM, Martin K. Petersen > <martin.petersen@xxxxxxxxxx> wrote: >> Sinan Kaya <okaya@xxxxxxxxxxxxxx> writes: >> >>> Due to relaxed ordering requirements on multiple architectures, >>> drivers are required to use wmb/rmb/mb combinations when they need to >>> guarantee observability between the memory and the HW. >>> >>> The mpt3sas driver is already using wmb() for this purpose. However, >>> it issues a writel following wmb(). writel() function on arm/arm64 >>> arhictectures have an embedded wmb() call inside. > > [Sreekanth] Whether same thing applicable for SPARC & POWER > architectures. If yes then we are fine with this patch changes. This is also true for Power. Reviewed-by: Brian King <brking@xxxxxxxxxxxxxxxxxx> -Brian -- Brian King Power Linux I/O IBM Linux Technology Center
