From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757119Ab3JJUHV (ORCPT ); Thu, 10 Oct 2013 16:07:21 -0400 Received: from cassiel.sirena.org.uk ([80.68.93.111]:56495 "EHLO cassiel.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755789Ab3JJUHU (ORCPT ); Thu, 10 Oct 2013 16:07:20 -0400 From: Mark Brown To: linux-kernel@vger.kernel.org Cc: linaro-kernel@lists.linaro.org, Mark Brown Date: Thu, 10 Oct 2013 21:06:57 +0100 Message-Id: <1381435617-18743-1-git-send-email-broonie@kernel.org> X-Mailer: git-send-email 1.8.4.rc3 X-SA-Exim-Connect-IP: 94.175.92.69 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: [PATCH] regmap: Use async I/O during cache sync X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:57:07 +0000) X-SA-Exim-Scanned: Yes (on cassiel.sirena.org.uk) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mark Brown Try to speed up I/O a little by not synchronising until we are finished scheduling writes. A brief survey of existing users suggests we have none that would currently benefit from an async cache sync. Signed-off-by: Mark Brown --- drivers/base/regmap/regcache.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index a36112a..d4dd771 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -307,6 +307,8 @@ int regcache_sync(struct regmap *map) if (!map->cache_dirty) goto out; + map->async = true; + /* Apply any patch first */ map->cache_bypass = 1; for (i = 0; i < map->patch_regs; i++) { @@ -332,11 +334,15 @@ int regcache_sync(struct regmap *map) map->cache_dirty = false; out: - trace_regcache_sync(map->dev, name, "stop"); /* Restore the bypass state */ + map->async = false; map->cache_bypass = bypass; map->unlock(map->lock_arg); + regmap_async_complete(map); + + trace_regcache_sync(map->dev, name, "stop"); + return ret; } EXPORT_SYMBOL_GPL(regcache_sync); @@ -375,17 +381,23 @@ int regcache_sync_region(struct regmap *map, unsigned int min, if (!map->cache_dirty) goto out; + map->async = true; + if (map->cache_ops->sync) ret = map->cache_ops->sync(map, min, max); else ret = regcache_default_sync(map, min, max); out: - trace_regcache_sync(map->dev, name, "stop region"); /* Restore the bypass state */ map->cache_bypass = bypass; + map->async = false; map->unlock(map->lock_arg); + regmap_async_complete(map); + + trace_regcache_sync(map->dev, name, "stop region"); + return ret; } EXPORT_SYMBOL_GPL(regcache_sync_region); -- 1.8.4.rc3