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From: Zhen Lei <thunder.leizhen@huawei.com>
To: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>,
	John Garry <john.garry@huawei.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Will Deacon <will.deacon@arm.com>, Joerg Roedel <joro@8bytes.org>,
	Jonathan Corbet <corbet@lwn.net>,
	linux-doc <linux-doc@vger.kernel.org>,
	Sebastian Ott <sebott@linux.ibm.com>,
	Gerald Schaefer <gerald.schaefer@de.ibm.com>,
	"Martin Schwidefsky" <schwidefsky@de.ibm.com>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	"Michael Ellerman" <mpe@ellerman.id.au>,
	Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H . Peter Anvin" <hpa@zytor.com>,
	David Woodhouse <dwmw2@infradead.org>,
	iommu <iommu@lists.linux-foundation.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-s390 <linux-s390@vger.kernel.org>,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
	x86 <x86@kernel.org>, linux-ia64 <linux-ia64@vger.kernel.org>
Subject: [PATCH v9 2/7] x86/dma: use IS_ENABLED() to simplify the code
Date: Thu, 13 Jun 2019 16:42:35 +0800
Message-ID: <20190613084240.16768-3-thunder.leizhen@huawei.com> (raw)
In-Reply-To: <20190613084240.16768-1-thunder.leizhen@huawei.com>

Remove the ifdefs around CONFIG_IOMMU_DEFAULT_PASSTHROUGH to improve
readablity.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
---
 arch/x86/kernel/pci-dma.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index dcd272dbd0a9330..8c82b2e28a0fe2d 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -43,11 +43,7 @@
  * It is also possible to disable by default in kernel config, and enable with
  * iommu=nopt at boot time.
  */
-#ifdef CONFIG_IOMMU_DEFAULT_PASSTHROUGH
-int iommu_pass_through __read_mostly = 1;
-#else
-int iommu_pass_through __read_mostly;
-#endif
+int iommu_pass_through __read_mostly =	IS_ENABLED(CONFIG_IOMMU_DEFAULT_PASSTHROUGH);
 
 extern struct iommu_table_entry __iommu_table[], __iommu_table_end[];
 
-- 
1.8.3


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  parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-13  8:42 [PATCH v9 0/7] iommu: enhance IOMMU default DMA mode build options Zhen Lei
2019-06-13  8:42 ` [PATCH v9 1/7] " Zhen Lei
2019-06-13  8:42 ` Zhen Lei [this message]
2019-06-13  8:42 ` [PATCH v9 3/7] s390/pci: add support for " Zhen Lei
2019-06-13  8:42 ` [PATCH v9 4/7] powernv/iommu: " Zhen Lei
2019-06-13  8:42 ` [PATCH v9 5/7] iommu/vt-d: " Zhen Lei
2019-06-13  8:42 ` [PATCH v9 6/7] iommu/amd: " Zhen Lei
2019-06-13  8:42 ` [PATCH v9 7/7] ia64: hide build option IOMMU_DEFAULT_PASSTHROUGH Zhen Lei

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