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d="scan'208";a="2651576" From: Anthony PERARD To: Date: Thu, 4 Jul 2019 16:15:22 +0100 Message-ID: <20190704151522.32639-1-anthony.perard@citrix.com> X-Mailer: git-send-email 2.22.0 MIME-Version: 1.0 Subject: [Xen-devel] [PATCH] include/public/io/ring.h: Remove xen_mb, xen_rmb, xen_wmb macros X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Anthony PERARD , Juergen Gross , Paul Durrant , Konrad Rzeszutek Wilk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Those macros where introduced when a prefix "xen_" was added to mb,rmb,wmb. There are gated on __XEN_INTERFACE_VERSION__, but there are not part of the Xen interface. Users of ring.h needs to provide xen_[rw]?mb() anywai because [rw]?mb() isn't likely to exist. Suggested-by: Paul Durrant Signed-off-by: Anthony PERARD --- xen/include/public/io/ring.h | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/xen/include/public/io/ring.h b/xen/include/public/io/ring.h index c5d53e3103..5610ae14f8 100644 --- a/xen/include/public/io/ring.h +++ b/xen/include/public/io/ring.h @@ -33,6 +33,13 @@ * - standard integers types (uint8_t, uint16_t, etc) * They are provided by stdint.h of the standard headers. * + * Before using the different macros, you need to provide the following + * macros: + * - xen_mb() a memory barrier + * - xen_rmb() a read memory barrier + * - xen_wmb() a write memory barrier + * Example of those can be found in xenctrl.h. + * * In addition, if you intend to use the FLEX macros, you also need to * provide the following, before invoking the FLEX macros: * - size_t @@ -42,14 +49,6 @@ * and grant_table.h from the Xen public headers. */ =20 -#include "../xen-compat.h" - -#if __XEN_INTERFACE_VERSION__ < 0x00030208 -#define xen_mb() mb() -#define xen_rmb() rmb() -#define xen_wmb() wmb() -#endif - typedef unsigned int RING_IDX; =20 /* Round a 32-bit unsigned constant down to the nearest power of two. */ --=20 Anthony PERARD _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel