[24/25] mm: remove the HMM config option
diff mbox series

Message ID 20190626122724.13313-25-hch@lst.de
State New
Headers show
Series
  • [01/25] mm: remove the unused ARCH_HAS_HMM_DEVICE Kconfig option
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Commit Message

Christoph Hellwig June 26, 2019, 12:27 p.m. UTC
All the mm/hmm.c code is better keyed off HMM_MIRROR.  Also let nouveau
depend on it instead of the mix of a dummy dependency symbol plus the
actually selected one.  Drop various odd dependencies, as the code is
pretty portable.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/gpu/drm/nouveau/Kconfig |  3 +--
 include/linux/hmm.h             |  5 +----
 include/linux/mm_types.h        |  2 +-
 mm/Kconfig                      | 27 ++++-----------------------
 mm/Makefile                     |  2 +-
 mm/hmm.c                        |  2 --
 6 files changed, 8 insertions(+), 33 deletions(-)

Comments

Ira Weiny June 26, 2019, 9:38 p.m. UTC | #1
On Wed, Jun 26, 2019 at 02:27:23PM +0200, Christoph Hellwig wrote:
> All the mm/hmm.c code is better keyed off HMM_MIRROR.  Also let nouveau
> depend on it instead of the mix of a dummy dependency symbol plus the
> actually selected one.  Drop various odd dependencies, as the code is
> pretty portable.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Seems reasonable to me.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>

> ---
>  drivers/gpu/drm/nouveau/Kconfig |  3 +--
>  include/linux/hmm.h             |  5 +----
>  include/linux/mm_types.h        |  2 +-
>  mm/Kconfig                      | 27 ++++-----------------------
>  mm/Makefile                     |  2 +-
>  mm/hmm.c                        |  2 --
>  6 files changed, 8 insertions(+), 33 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
> index 6303d203ab1d..66c839d8e9d1 100644
> --- a/drivers/gpu/drm/nouveau/Kconfig
> +++ b/drivers/gpu/drm/nouveau/Kconfig
> @@ -84,11 +84,10 @@ config DRM_NOUVEAU_BACKLIGHT
>  
>  config DRM_NOUVEAU_SVM
>  	bool "(EXPERIMENTAL) Enable SVM (Shared Virtual Memory) support"
> -	depends on ARCH_HAS_HMM
>  	depends on DEVICE_PRIVATE
>  	depends on DRM_NOUVEAU
> +	depends on HMM_MIRROR
>  	depends on STAGING
> -	select HMM_MIRROR
>  	default n
>  	help
>  	  Say Y here if you want to enable experimental support for
> diff --git a/include/linux/hmm.h b/include/linux/hmm.h
> index 3d00e9550e77..b697496e85ba 100644
> --- a/include/linux/hmm.h
> +++ b/include/linux/hmm.h
> @@ -62,7 +62,7 @@
>  #include <linux/kconfig.h>
>  #include <asm/pgtable.h>
>  
> -#if IS_ENABLED(CONFIG_HMM)
> +#ifdef CONFIG_HMM_MIRROR
>  
>  #include <linux/device.h>
>  #include <linux/migrate.h>
> @@ -332,9 +332,6 @@ static inline uint64_t hmm_pfn_from_pfn(const struct hmm_range *range,
>  	return hmm_device_entry_from_pfn(range, pfn);
>  }
>  
> -
> -
> -#if IS_ENABLED(CONFIG_HMM_MIRROR)
>  /*
>   * Mirroring: how to synchronize device page table with CPU page table.
>   *
> diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
> index f33a1289c101..8d37182f8dbe 100644
> --- a/include/linux/mm_types.h
> +++ b/include/linux/mm_types.h
> @@ -501,7 +501,7 @@ struct mm_struct {
>  #endif
>  		struct work_struct async_put_work;
>  
> -#if IS_ENABLED(CONFIG_HMM)
> +#ifdef CONFIG_HMM_MIRROR
>  		/* HMM needs to track a few things per mm */
>  		struct hmm *hmm;
>  #endif
> diff --git a/mm/Kconfig b/mm/Kconfig
> index eecf037a54b3..1e426c26b1d6 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -669,37 +669,18 @@ config ZONE_DEVICE
>  
>  	  If FS_DAX is enabled, then say Y.
>  
> -config ARCH_HAS_HMM_MIRROR
> -	bool
> -	default y
> -	depends on (X86_64 || PPC64)
> -	depends on MMU && 64BIT
> -
> -config ARCH_HAS_HMM
> -	bool
> -	depends on (X86_64 || PPC64)
> -	depends on ZONE_DEVICE
> -	depends on MMU && 64BIT
> -	depends on MEMORY_HOTPLUG
> -	depends on MEMORY_HOTREMOVE
> -	depends on SPARSEMEM_VMEMMAP
> -	default y
> -
>  config MIGRATE_VMA_HELPER
>  	bool
>  
>  config DEV_PAGEMAP_OPS
>  	bool
>  
> -config HMM
> -	bool
> -	select MMU_NOTIFIER
> -	select MIGRATE_VMA_HELPER
> -
>  config HMM_MIRROR
>  	bool "HMM mirror CPU page table into a device page table"
> -	depends on ARCH_HAS_HMM
> -	select HMM
> +	depends on (X86_64 || PPC64)
> +	depends on MMU && 64BIT
> +	select MMU_NOTIFIER
> +	select MIGRATE_VMA_HELPER
>  	help
>  	  Select HMM_MIRROR if you want to mirror range of the CPU page table of a
>  	  process into a device page table. Here, mirror means "keep synchronized".
> diff --git a/mm/Makefile b/mm/Makefile
> index ac5e5ba78874..91c99040065c 100644
> --- a/mm/Makefile
> +++ b/mm/Makefile
> @@ -102,5 +102,5 @@ obj-$(CONFIG_FRAME_VECTOR) += frame_vector.o
>  obj-$(CONFIG_DEBUG_PAGE_REF) += debug_page_ref.o
>  obj-$(CONFIG_HARDENED_USERCOPY) += usercopy.o
>  obj-$(CONFIG_PERCPU_STATS) += percpu-stats.o
> -obj-$(CONFIG_HMM) += hmm.o
> +obj-$(CONFIG_HMM_MIRROR) += hmm.o
>  obj-$(CONFIG_MEMFD_CREATE) += memfd.o
> diff --git a/mm/hmm.c b/mm/hmm.c
> index 90ca0cdab9db..d62ce64d6bca 100644
> --- a/mm/hmm.c
> +++ b/mm/hmm.c
> @@ -25,7 +25,6 @@
>  #include <linux/mmu_notifier.h>
>  #include <linux/memory_hotplug.h>
>  
> -#if IS_ENABLED(CONFIG_HMM_MIRROR)
>  static const struct mmu_notifier_ops hmm_mmu_notifier_ops;
>  
>  static inline struct hmm *mm_get_hmm(struct mm_struct *mm)
> @@ -1326,4 +1325,3 @@ long hmm_range_dma_unmap(struct hmm_range *range,
>  	return cpages;
>  }
>  EXPORT_SYMBOL(hmm_range_dma_unmap);
> -#endif /* IS_ENABLED(CONFIG_HMM_MIRROR) */
> -- 
> 2.20.1
> 
> _______________________________________________
> Linux-nvdimm mailing list
> Linux-nvdimm@lists.01.org
> https://lists.01.org/mailman/listinfo/linux-nvdimm
Jason Gunthorpe June 27, 2019, 4:29 p.m. UTC | #2
On Wed, Jun 26, 2019 at 02:27:23PM +0200, Christoph Hellwig wrote:
> All the mm/hmm.c code is better keyed off HMM_MIRROR.  Also let nouveau
> depend on it instead of the mix of a dummy dependency symbol plus the
> actually selected one.  Drop various odd dependencies, as the code is
> pretty portable.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/gpu/drm/nouveau/Kconfig |  3 +--
>  include/linux/hmm.h             |  5 +----
>  include/linux/mm_types.h        |  2 +-
>  mm/Kconfig                      | 27 ++++-----------------------
>  mm/Makefile                     |  2 +-
>  mm/hmm.c                        |  2 --
>  6 files changed, 8 insertions(+), 33 deletions(-)

Makes more sense to me too

Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>

Jason

Patch
diff mbox series

diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
index 6303d203ab1d..66c839d8e9d1 100644
--- a/drivers/gpu/drm/nouveau/Kconfig
+++ b/drivers/gpu/drm/nouveau/Kconfig
@@ -84,11 +84,10 @@  config DRM_NOUVEAU_BACKLIGHT
 
 config DRM_NOUVEAU_SVM
 	bool "(EXPERIMENTAL) Enable SVM (Shared Virtual Memory) support"
-	depends on ARCH_HAS_HMM
 	depends on DEVICE_PRIVATE
 	depends on DRM_NOUVEAU
+	depends on HMM_MIRROR
 	depends on STAGING
-	select HMM_MIRROR
 	default n
 	help
 	  Say Y here if you want to enable experimental support for
diff --git a/include/linux/hmm.h b/include/linux/hmm.h
index 3d00e9550e77..b697496e85ba 100644
--- a/include/linux/hmm.h
+++ b/include/linux/hmm.h
@@ -62,7 +62,7 @@ 
 #include <linux/kconfig.h>
 #include <asm/pgtable.h>
 
-#if IS_ENABLED(CONFIG_HMM)
+#ifdef CONFIG_HMM_MIRROR
 
 #include <linux/device.h>
 #include <linux/migrate.h>
@@ -332,9 +332,6 @@  static inline uint64_t hmm_pfn_from_pfn(const struct hmm_range *range,
 	return hmm_device_entry_from_pfn(range, pfn);
 }
 
-
-
-#if IS_ENABLED(CONFIG_HMM_MIRROR)
 /*
  * Mirroring: how to synchronize device page table with CPU page table.
  *
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index f33a1289c101..8d37182f8dbe 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -501,7 +501,7 @@  struct mm_struct {
 #endif
 		struct work_struct async_put_work;
 
-#if IS_ENABLED(CONFIG_HMM)
+#ifdef CONFIG_HMM_MIRROR
 		/* HMM needs to track a few things per mm */
 		struct hmm *hmm;
 #endif
diff --git a/mm/Kconfig b/mm/Kconfig
index eecf037a54b3..1e426c26b1d6 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -669,37 +669,18 @@  config ZONE_DEVICE
 
 	  If FS_DAX is enabled, then say Y.
 
-config ARCH_HAS_HMM_MIRROR
-	bool
-	default y
-	depends on (X86_64 || PPC64)
-	depends on MMU && 64BIT
-
-config ARCH_HAS_HMM
-	bool
-	depends on (X86_64 || PPC64)
-	depends on ZONE_DEVICE
-	depends on MMU && 64BIT
-	depends on MEMORY_HOTPLUG
-	depends on MEMORY_HOTREMOVE
-	depends on SPARSEMEM_VMEMMAP
-	default y
-
 config MIGRATE_VMA_HELPER
 	bool
 
 config DEV_PAGEMAP_OPS
 	bool
 
-config HMM
-	bool
-	select MMU_NOTIFIER
-	select MIGRATE_VMA_HELPER
-
 config HMM_MIRROR
 	bool "HMM mirror CPU page table into a device page table"
-	depends on ARCH_HAS_HMM
-	select HMM
+	depends on (X86_64 || PPC64)
+	depends on MMU && 64BIT
+	select MMU_NOTIFIER
+	select MIGRATE_VMA_HELPER
 	help
 	  Select HMM_MIRROR if you want to mirror range of the CPU page table of a
 	  process into a device page table. Here, mirror means "keep synchronized".
diff --git a/mm/Makefile b/mm/Makefile
index ac5e5ba78874..91c99040065c 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -102,5 +102,5 @@  obj-$(CONFIG_FRAME_VECTOR) += frame_vector.o
 obj-$(CONFIG_DEBUG_PAGE_REF) += debug_page_ref.o
 obj-$(CONFIG_HARDENED_USERCOPY) += usercopy.o
 obj-$(CONFIG_PERCPU_STATS) += percpu-stats.o
-obj-$(CONFIG_HMM) += hmm.o
+obj-$(CONFIG_HMM_MIRROR) += hmm.o
 obj-$(CONFIG_MEMFD_CREATE) += memfd.o
diff --git a/mm/hmm.c b/mm/hmm.c
index 90ca0cdab9db..d62ce64d6bca 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -25,7 +25,6 @@ 
 #include <linux/mmu_notifier.h>
 #include <linux/memory_hotplug.h>
 
-#if IS_ENABLED(CONFIG_HMM_MIRROR)
 static const struct mmu_notifier_ops hmm_mmu_notifier_ops;
 
 static inline struct hmm *mm_get_hmm(struct mm_struct *mm)
@@ -1326,4 +1325,3 @@  long hmm_range_dma_unmap(struct hmm_range *range,
 	return cpages;
 }
 EXPORT_SYMBOL(hmm_range_dma_unmap);
-#endif /* IS_ENABLED(CONFIG_HMM_MIRROR) */