linux-kernel - [PATCH 2/3] iommu/io-pgtable: Prepare for modularization

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Message-Id: <1608280722-19841-3-git-send-email-isaacm@codeaurora.org>
Date:   Fri, 18 Dec 2020 00:38:41 -0800
From:   "Isaac J. Manjarres" <isaacm@...eaurora.org>
To:     iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     "Isaac J. Manjarres" <isaacm@...eaurora.org>, will@...nel.org,
        joro@...tes.org, robin.murphy@....com, pdaly@...eaurora.org,
        pratikp@...eaurora.org, kernel-team@...roid.com
Subject: [PATCH 2/3] iommu/io-pgtable: Prepare for modularization

The io-pgtable source file uses the #ifdef preprocessor macro
to construct the io_pgtable_init_table structure. However,
the #ifdef macro evaluates to true if the config it is testing
is set to y. This is not ideal when the configs that the
io-pgtable code checks for can be m, so use IS_ENABLED() instead.
Also, add the GPL v2 module license to the io-pgtable source file.

Signed-off-by: Isaac J. Manjarres <isaacm@...eaurora.org>
---
 drivers/iommu/io-pgtable.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/io-pgtable.c b/drivers/iommu/io-pgtable.c
index 94394c8..867ecb4 100644
--- a/drivers/iommu/io-pgtable.c
+++ b/drivers/iommu/io-pgtable.c
@@ -10,18 +10,19 @@
 #include <linux/bug.h>
 #include <linux/io-pgtable.h>
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/types.h>
 
 static const struct io_pgtable_init_fns *
 io_pgtable_init_table[IO_PGTABLE_NUM_FMTS] = {
-#ifdef CONFIG_IOMMU_IO_PGTABLE_LPAE
+#if IS_ENABLED(CONFIG_IOMMU_IO_PGTABLE_LPAE)
 	[ARM_32_LPAE_S1] = &io_pgtable_arm_32_lpae_s1_init_fns,
 	[ARM_32_LPAE_S2] = &io_pgtable_arm_32_lpae_s2_init_fns,
 	[ARM_64_LPAE_S1] = &io_pgtable_arm_64_lpae_s1_init_fns,
 	[ARM_64_LPAE_S2] = &io_pgtable_arm_64_lpae_s2_init_fns,
 	[ARM_MALI_LPAE] = &io_pgtable_arm_mali_lpae_init_fns,
 #endif
-#ifdef CONFIG_IOMMU_IO_PGTABLE_ARMV7S
+#if IS_ENABLED(CONFIG_IOMMU_IO_PGTABLE_ARMV7S)
 	[ARM_V7S] = &io_pgtable_arm_v7s_init_fns,
 #endif
 };
@@ -68,3 +69,5 @@ void free_io_pgtable_ops(struct io_pgtable_ops *ops)
 	io_pgtable_init_table[iop->fmt]->free(iop);
 }
 EXPORT_SYMBOL_GPL(free_io_pgtable_ops);
+
+MODULE_LICENSE("GPL v2");
-- 
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