From: Marek Szyprowski <m.szyprowski@samsung.com> To: iommu@lists.linux-foundation.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Marek Szyprowski <m.szyprowski@samsung.com>, linaro-mm-sig@lists.linaro.org, Arnd Bergmann <arnd@arndb.de>, Shaik Ameer Basha <shaik.ameer@samsung.com>, Cho KyongHo <pullip.cho@samsung.com>, Joerg Roedel <joro@8bytes.org>, Thierry Reding <treding@nvidia.com>, Olof Johansson <olof@lixom.net>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Rob Herring <robh@kernel.org>, Will Deacon <will.deacon@arm.com>, David Wodhouse <dwmw2@infradead.org>, Inki Dae <inki.dae@samsung.com>, Kukjin Kim <kgene@kernel.org>, Tomasz Figa <tomasz.figa@gmail.com>, Kyungmin Park <kyungmin.park@samsung.com>, Joonyoung Shim <jy0922.shim@samsung.com>, Seung-Woo Kim <sw0312.kim@samsung.com>, Javier Martinez Canillas <javier@dowhile0.org> Subject: [PATCH v6 07/25] iommu: exynos: remove useless spinlock Date: Mon, 04 May 2015 10:16:02 +0200 [thread overview] Message-ID: <1430727380-10912-8-git-send-email-m.szyprowski@samsung.com> (raw) In-Reply-To: <1430727380-10912-1-git-send-email-m.szyprowski@samsung.com> This patch removes useless spinlocks and other unused members from struct exynos_iommu_owner. There is no point is protecting this structure by spinlock because content of this structure doesn't change and other structures have their own spinlocks. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- drivers/iommu/exynos-iommu.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 98aa7e9c2507..c307c400613c 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -189,9 +189,6 @@ struct exynos_iommu_owner { struct list_head client; /* entry of exynos_iommu_domain.clients */ struct device *dev; struct device *sysmmu; - struct iommu_domain *domain; - void *vmm_data; /* IO virtual memory manager's data */ - spinlock_t lock; /* Lock to preserve consistency of System MMU */ }; struct exynos_iommu_domain { @@ -483,16 +480,12 @@ static int __exynos_sysmmu_enable(struct device *dev, phys_addr_t pgtable, BUG_ON(!has_sysmmu(dev)); - spin_lock_irqsave(&owner->lock, flags); - data = dev_get_drvdata(owner->sysmmu); ret = __sysmmu_enable(data, pgtable, domain); if (ret >= 0) data->master = dev; - spin_unlock_irqrestore(&owner->lock, flags); - return ret; } @@ -505,16 +498,12 @@ static bool exynos_sysmmu_disable(struct device *dev) BUG_ON(!has_sysmmu(dev)); - spin_lock_irqsave(&owner->lock, flags); - data = dev_get_drvdata(owner->sysmmu); disabled = __sysmmu_disable(data); if (disabled) data->master = NULL; - spin_unlock_irqrestore(&owner->lock, flags); - return disabled; } -- 1.9.2
WARNING: multiple messages have this Message-ID (diff)
From: m.szyprowski@samsung.com (Marek Szyprowski) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v6 07/25] iommu: exynos: remove useless spinlock Date: Mon, 04 May 2015 10:16:02 +0200 [thread overview] Message-ID: <1430727380-10912-8-git-send-email-m.szyprowski@samsung.com> (raw) In-Reply-To: <1430727380-10912-1-git-send-email-m.szyprowski@samsung.com> This patch removes useless spinlocks and other unused members from struct exynos_iommu_owner. There is no point is protecting this structure by spinlock because content of this structure doesn't change and other structures have their own spinlocks. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- drivers/iommu/exynos-iommu.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 98aa7e9c2507..c307c400613c 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -189,9 +189,6 @@ struct exynos_iommu_owner { struct list_head client; /* entry of exynos_iommu_domain.clients */ struct device *dev; struct device *sysmmu; - struct iommu_domain *domain; - void *vmm_data; /* IO virtual memory manager's data */ - spinlock_t lock; /* Lock to preserve consistency of System MMU */ }; struct exynos_iommu_domain { @@ -483,16 +480,12 @@ static int __exynos_sysmmu_enable(struct device *dev, phys_addr_t pgtable, BUG_ON(!has_sysmmu(dev)); - spin_lock_irqsave(&owner->lock, flags); - data = dev_get_drvdata(owner->sysmmu); ret = __sysmmu_enable(data, pgtable, domain); if (ret >= 0) data->master = dev; - spin_unlock_irqrestore(&owner->lock, flags); - return ret; } @@ -505,16 +498,12 @@ static bool exynos_sysmmu_disable(struct device *dev) BUG_ON(!has_sysmmu(dev)); - spin_lock_irqsave(&owner->lock, flags); - data = dev_get_drvdata(owner->sysmmu); disabled = __sysmmu_disable(data); if (disabled) data->master = NULL; - spin_unlock_irqrestore(&owner->lock, flags); - return disabled; } -- 1.9.2
next prev parent reply other threads:[~2015-05-04 8:17 UTC|newest] Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-05-04 8:15 [PATCH v6 00/25] Exynos SYSMMU (IOMMU) integration with DT and DMA-mapping subsystem Marek Szyprowski 2015-05-04 8:15 ` Marek Szyprowski 2015-05-04 8:15 ` [PATCH v6 02/25] arm: exynos: pm_domains: register power domain driver from core_initcall Marek Szyprowski 2015-05-04 8:15 ` Marek Szyprowski 2015-05-04 8:15 ` [PATCH v6 03/25] drm/exynos: iommu: detach from default dma-mapping domain on init Marek Szyprowski 2015-05-04 8:15 ` Marek Szyprowski 2015-05-04 8:15 ` [PATCH v6 04/25] drm/exynos: fimd: ensure proper hw state in fimd_clear_channel() Marek Szyprowski 2015-05-04 8:15 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 05/25] iommu: exynos: don't read version register on every tlb operation Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-10 12:59 ` Cho KyongHo 2015-05-10 12:59 ` Cho KyongHo [not found] ` <1430727380-10912-1-git-send-email-m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2015-05-04 8:15 ` [PATCH v6 01/25] arm: dma-mapping: add support for creating reserved mappings in iova space Marek Szyprowski 2015-05-04 8:15 ` Marek Szyprowski 2015-05-04 22:12 ` Rob Herring 2015-05-04 22:12 ` Rob Herring [not found] ` <CAL_JsqKB4F8tspydBFrL-PH3gXcyu-pwQwBETMizJzTpAF3yzg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2015-05-18 12:09 ` Marek Szyprowski 2015-05-18 12:09 ` Marek Szyprowski 2015-05-06 14:01 ` Robin Murphy 2015-05-06 14:01 ` Robin Murphy 2015-05-19 10:49 ` Marek Szyprowski 2015-05-19 10:49 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 06/25] iommu: exynos: remove unused functions Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-10 13:01 ` Cho KyongHo 2015-05-10 13:01 ` Cho KyongHo 2015-05-04 10:30 ` [PATCH v6 27/26] iommu: exynos: add system suspend/resume support Marek Szyprowski 2015-05-04 10:30 ` Marek Szyprowski 2015-05-05 15:05 ` [PATCH v6 00/25] Exynos SYSMMU (IOMMU) integration with DT and DMA-mapping subsystem Joerg Roedel 2015-05-05 15:05 ` Joerg Roedel 2015-05-18 12:16 ` Marek Szyprowski 2015-05-18 12:16 ` Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski [this message] 2015-05-04 8:16 ` [PATCH v6 07/25] iommu: exynos: remove useless spinlock Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 08/25] iommu: exynos: refactor function parameters to simplify code Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski [not found] ` <1430727380-10912-9-git-send-email-m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2015-05-05 14:52 ` Joerg Roedel 2015-05-05 14:52 ` Joerg Roedel 2015-05-10 13:27 ` Cho KyongHo 2015-05-10 13:27 ` Cho KyongHo [not found] ` <20150510222712.a955a6d326698ba5a09c6fe7-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2015-05-18 12:58 ` Marek Szyprowski 2015-05-18 12:58 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 09/25] iommu: exynos: remove unused functions, part 2 Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski [not found] ` <1430727380-10912-10-git-send-email-m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2015-05-05 14:53 ` Joerg Roedel 2015-05-05 14:53 ` Joerg Roedel 2015-05-04 8:16 ` [PATCH v6 10/25] iommu: exynos: remove useless device_add/remove callbacks Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski [not found] ` <1430727380-10912-11-git-send-email-m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2015-05-05 14:55 ` Joerg Roedel 2015-05-05 14:55 ` Joerg Roedel [not found] ` <20150505145538.GL15736-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> 2015-05-18 12:09 ` Marek Szyprowski 2015-05-18 12:09 ` Marek Szyprowski 2015-05-18 17:04 ` Joerg Roedel 2015-05-18 17:04 ` Joerg Roedel [not found] ` <20150518170430.GK20611-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> 2015-05-18 19:37 ` Laurent Pinchart 2015-05-18 19:37 ` Laurent Pinchart 2015-05-04 8:16 ` [PATCH v6 11/25] iommu: exynos: add support for binding more than one sysmmu to master device Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-10 13:34 ` Cho KyongHo 2015-05-10 13:34 ` Cho KyongHo [not found] ` <20150510223437.b651f6d2f3f0ead49eb72488-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2015-05-18 13:03 ` Marek Szyprowski 2015-05-18 13:03 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 12/25] iommu: exynos: add support for runtime_pm Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-10 13:38 ` Cho KyongHo 2015-05-10 13:38 ` Cho KyongHo 2015-05-18 12:25 ` Marek Szyprowski 2015-05-18 12:25 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 13/25] iommu: exynos: rename variables to reflect their purpose Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 14/25] iommu: exynos: use struct exynos_iommu_domain in internal structures Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 15/25] iommu: exynos: document " Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski [not found] ` <1430727380-10912-16-git-send-email-m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2015-05-05 15:00 ` Joerg Roedel 2015-05-05 15:00 ` Joerg Roedel 2015-05-04 8:16 ` [PATCH v6 16/25] iommu: exynos: remove excessive includes and sort others alphabetically Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 17/25] iommu: exynos: init from dt-specific callback instead of initcall Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 18/25] iommu: exynos: add callback for initializing devices from device tree Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 19/25] iommu: exynos: remove unneeded code Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-04 8:16 ` [PATCH v6 20/25] ARM: dts: exynos4: add sysmmu nodes Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-05 4:08 ` Krzysztof Kozłowski 2015-05-05 4:08 ` Krzysztof Kozłowski 2015-05-04 8:16 ` [PATCH v6 21/25] ARM: dts: exynos3250: " Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-05 4:10 ` Krzysztof Kozłowski 2015-05-05 4:10 ` Krzysztof Kozłowski 2015-05-04 8:16 ` [PATCH v6 22/25] ARM: dts: exynos4415: " Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-05 4:09 ` Krzysztof Kozłowski 2015-05-05 4:09 ` Krzysztof Kozłowski 2015-05-04 8:16 ` [PATCH v6 23/25] ARM: dts: exynos5250: " Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-05 4:04 ` Krzysztof Kozłowski 2015-05-05 4:04 ` Krzysztof Kozłowski 2015-05-04 8:16 ` [PATCH v6 24/25] ARM: dts: exynos5420: " Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski 2015-05-05 4:10 ` Krzysztof Kozłowski 2015-05-05 4:10 ` Krzysztof Kozłowski 2015-05-04 8:16 ` [PATCH v6 25/25] ARM: dts: exynos: add iommu reserved regions for bootloader's splash screen Marek Szyprowski 2015-05-04 8:16 ` Marek Szyprowski [not found] ` <1430727380-10912-26-git-send-email-m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2015-05-05 5:50 ` Krzysztof Kozłowski 2015-05-05 5:50 ` Krzysztof Kozłowski 2015-05-11 16:00 ` [PATCH v6 00/25] Exynos SYSMMU (IOMMU) integration with DT and DMA-mapping subsystem Javier Martinez Canillas 2015-05-11 16:00 ` Javier Martinez Canillas 2015-05-12 15:35 ` Javier Martinez Canillas 2015-05-12 15:35 ` Javier Martinez Canillas 2015-05-18 13:26 ` Marek Szyprowski 2015-05-18 13:26 ` Marek Szyprowski [not found] ` <5559E88E.9050108-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2015-05-18 13:32 ` Javier Martinez Canillas 2015-05-18 13:32 ` Javier Martinez Canillas
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