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[142.68.128.5]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-45da763fdbdsm38396711cf.82.2024.10.08.11.12.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Oct 2024 11:12:33 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1syEhE-006qUW-Iy; Tue, 08 Oct 2024 15:12:32 -0300 Date: Tue, 8 Oct 2024 15:12:32 -0300 From: Jason Gunthorpe To: Uros Bizjak Cc: iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Joerg Roedel , Suravee Suthikulpanit , Will Deacon , Robin Murphy Subject: Re: [PATCH] iommu/amd: Use atomic64_inc_return() in iommu.c Message-ID: <20241008181232.GD762027@ziepe.ca> References: <20241007084356.47799-1-ubizjak@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241007084356.47799-1-ubizjak@gmail.com> On Mon, Oct 07, 2024 at 10:43:31AM +0200, Uros Bizjak wrote: > Use atomic64_inc_return(&ref) instead of atomic64_add_return(1, &ref) > to use optimized implementation and ease register pressure around > the primitive for targets that implement optimized variant. > > Signed-off-by: Uros Bizjak > Cc: Joerg Roedel > Cc: Suravee Suthikulpanit > Cc: Will Deacon > Cc: Robin Murphy > --- > drivers/iommu/amd/iommu.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) Reviewed-by: Jason Gunthorpe Jason