| Message ID | 20190626122724.13313-25-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | [01/25] mm: remove the unused ARCH_HAS_HMM_DEVICE Kconfig option | expand |
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
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
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) */
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(-)