diff mbox

[V10,12/12] ACPI/IORT: Remove linker section for IORT entries probing

Message ID 1491301105-5274-13-git-send-email-sricharan@codeaurora.org (mailing list archive)
State Not Applicable, archived
Delegated to: Andy Gross
Headers show

Commit Message

Sricharan Ramabadhran April 4, 2017, 10:18 a.m. UTC
From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

The IORT linker section introduced by commit 34ceea275f62
("ACPI/IORT: Introduce linker section for IORT entries probing")
was needed to make sure SMMU drivers are registered (and therefore
probed) in the kernel before devices using the SMMU have a chance
to probe in turn.

Through the introduction of deferred IOMMU configuration the linker
section based IORT probing infrastructure is not needed any longer, in
that device/SMMU probe dependencies are managed through the probe
deferral mechanism, making the IORT linker section infrastructure
unused, so that it can be removed.

Remove the unused IORT linker section probing infrastructure
from the kernel to complete the ACPI IORT IOMMU configure probe
deferral mechanism implementation.

Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Sricharan R <sricharan@codeaurora.org>
---
 drivers/acpi/arm64/iort.c         | 2 --
 include/asm-generic/vmlinux.lds.h | 1 -
 include/linux/acpi_iort.h         | 3 ---
 3 files changed, 6 deletions(-)

Comments

Robin Murphy April 4, 2017, 11:33 a.m. UTC | #1
On 04/04/17 11:18, Sricharan R wrote:
> From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> 
> The IORT linker section introduced by commit 34ceea275f62
> ("ACPI/IORT: Introduce linker section for IORT entries probing")
> was needed to make sure SMMU drivers are registered (and therefore
> probed) in the kernel before devices using the SMMU have a chance
> to probe in turn.
> 
> Through the introduction of deferred IOMMU configuration the linker
> section based IORT probing infrastructure is not needed any longer, in
> that device/SMMU probe dependencies are managed through the probe
> deferral mechanism, making the IORT linker section infrastructure
> unused, so that it can be removed.
> 
> Remove the unused IORT linker section probing infrastructure
> from the kernel to complete the ACPI IORT IOMMU configure probe
> deferral mechanism implementation.

Reviewed-by: Robin Murphy <robin.murphy@arm.com>

> Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> Cc: Robin Murphy <robin.murphy@arm.com>
> Cc: Sricharan R <sricharan@codeaurora.org>
> ---
>  drivers/acpi/arm64/iort.c         | 2 --
>  include/asm-generic/vmlinux.lds.h | 1 -
>  include/linux/acpi_iort.h         | 3 ---
>  3 files changed, 6 deletions(-)
> 
> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
> index e323ece..e7b1940 100644
> --- a/drivers/acpi/arm64/iort.c
> +++ b/drivers/acpi/arm64/iort.c
> @@ -1000,6 +1000,4 @@ void __init acpi_iort_init(void)
>  	}
>  
>  	iort_init_platform_devices();
> -
> -	acpi_probe_device_table(iort);
>  }
> diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
> index 0968d13..9faa26c 100644
> --- a/include/asm-generic/vmlinux.lds.h
> +++ b/include/asm-generic/vmlinux.lds.h
> @@ -566,7 +566,6 @@
>  	IRQCHIP_OF_MATCH_TABLE()					\
>  	ACPI_PROBE_TABLE(irqchip)					\
>  	ACPI_PROBE_TABLE(clksrc)					\
> -	ACPI_PROBE_TABLE(iort)						\
>  	EARLYCON_TABLE()
>  
>  #define INIT_TEXT							\
> diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h
> index 77e0809..f167e1d04 100644
> --- a/include/linux/acpi_iort.h
> +++ b/include/linux/acpi_iort.h
> @@ -52,7 +52,4 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
>  { return NULL; }
>  #endif
>  
> -#define IORT_ACPI_DECLARE(name, table_id, fn)		\
> -	ACPI_DECLARE_PROBE_ENTRY(iort, name, table_id, 0, NULL, 0, fn)
> -
>  #endif /* __ACPI_IORT_H__ */
> 

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diff mbox

Patch

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index e323ece..e7b1940 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -1000,6 +1000,4 @@  void __init acpi_iort_init(void)
 	}
 
 	iort_init_platform_devices();
-
-	acpi_probe_device_table(iort);
 }
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 0968d13..9faa26c 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -566,7 +566,6 @@ 
 	IRQCHIP_OF_MATCH_TABLE()					\
 	ACPI_PROBE_TABLE(irqchip)					\
 	ACPI_PROBE_TABLE(clksrc)					\
-	ACPI_PROBE_TABLE(iort)						\
 	EARLYCON_TABLE()
 
 #define INIT_TEXT							\
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h
index 77e0809..f167e1d04 100644
--- a/include/linux/acpi_iort.h
+++ b/include/linux/acpi_iort.h
@@ -52,7 +52,4 @@  const struct iommu_ops *iort_iommu_configure(struct device *dev)
 { return NULL; }
 #endif
 
-#define IORT_ACPI_DECLARE(name, table_id, fn)		\
-	ACPI_DECLARE_PROBE_ENTRY(iort, name, table_id, 0, NULL, 0, fn)
-
 #endif /* __ACPI_IORT_H__ */