From: Dan Williams <dan.j.williams@intel.com> To: akpm@linux-foundation.org Cc: David Hildenbrand <david@redhat.com>, Dave Hansen <dave.hansen@linux.intel.com>, Pavel Tatashin <pasha.tatashin@soleen.com>, Brice Goglin <Brice.Goglin@inria.fr>, Jia He <justin.he@arm.com>, Joao Martins <joao.m.martins@oracle.com>, Jonathan Cameron <Jonathan.Cameron@huawei.com>, linux-mm@kvack.org, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 04/17] device-dax/kmem: replace release_resource() with release_mem_region() Date: Fri, 25 Sep 2020 12:12:02 -0700 [thread overview] Message-ID: <160106112239.30709.15909567572288425294.stgit@dwillia2-desk3.amr.corp.intel.com> (raw) In-Reply-To: <160106109960.30709.7379926726669669398.stgit@dwillia2-desk3.amr.corp.intel.com> Towards removing the mode specific @dax_kmem_res attribute from the generic 'struct dev_dax', and preparing for multi-range support, change the kmem driver to use the idiomatic release_mem_region() to pair with the initial request_mem_region(). This also eliminates the need to open code the release of the resource allocated by request_mem_region(). As there are no more dax_kmem_res users, delete this struct member. Cc: David Hildenbrand <david@redhat.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Brice Goglin <Brice.Goglin@inria.fr> Cc: Dave Jiang <dave.jiang@intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Jia He <justin.he@arm.com> Cc: Joao Martins <joao.m.martins@oracle.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- drivers/dax/dax-private.h | 3 --- drivers/dax/kmem.c | 20 +++++++------------- 2 files changed, 7 insertions(+), 16 deletions(-) diff --git a/drivers/dax/dax-private.h b/drivers/dax/dax-private.h index 6779f683671d..12a2dbc43b40 100644 --- a/drivers/dax/dax-private.h +++ b/drivers/dax/dax-private.h @@ -42,8 +42,6 @@ struct dax_region { * @dev - device core * @pgmap - pgmap for memmap setup / lifetime (driver owned) * @range: resource range for the instance - * @dax_mem_res: physical address range of hotadded DAX memory - * @dax_mem_name: name for hotadded DAX memory via add_memory_driver_managed() */ struct dev_dax { struct dax_region *region; @@ -52,7 +50,6 @@ struct dev_dax { struct device dev; struct dev_pagemap *pgmap; struct range range; - struct resource *dax_kmem_res; }; static inline u64 range_len(struct range *range) diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c index 6fe2cb1c5f7c..e56fc688bdc5 100644 --- a/drivers/dax/kmem.c +++ b/drivers/dax/kmem.c @@ -33,7 +33,7 @@ int dev_dax_kmem_probe(struct device *dev) { struct dev_dax *dev_dax = to_dev_dax(dev); struct range range = dax_kmem_range(dev_dax); - struct resource *new_res; + struct resource *res; char *res_name; int numa_node; int rc; @@ -56,8 +56,8 @@ int dev_dax_kmem_probe(struct device *dev) return -ENOMEM; /* Region is permanently reserved if hotremove fails. */ - new_res = request_mem_region(range.start, range_len(&range), res_name); - if (!new_res) { + res = request_mem_region(range.start, range_len(&range), res_name); + if (!res) { dev_warn(dev, "could not reserve region [%#llx-%#llx]\n", range.start, range.end); kfree(res_name); return -EBUSY; @@ -69,23 +69,20 @@ int dev_dax_kmem_probe(struct device *dev) * inherit flags from the parent since it may set new flags * unknown to us that will break add_memory() below. */ - new_res->flags = IORESOURCE_SYSTEM_RAM; + res->flags = IORESOURCE_SYSTEM_RAM; /* * Ensure that future kexec'd kernels will not treat this as RAM * automatically. */ - rc = add_memory_driver_managed(numa_node, new_res->start, - resource_size(new_res), kmem_name); + rc = add_memory_driver_managed(numa_node, range.start, range_len(&range), kmem_name); if (rc) { - release_resource(new_res); - kfree(new_res); + release_mem_region(range.start, range_len(&range)); kfree(res_name); return rc; } dev_set_drvdata(dev, res_name); - dev_dax->dax_kmem_res = new_res; return 0; } @@ -95,7 +92,6 @@ static int dev_dax_kmem_remove(struct device *dev) { struct dev_dax *dev_dax = to_dev_dax(dev); struct range range = dax_kmem_range(dev_dax); - struct resource *res = dev_dax->dax_kmem_res; const char *res_name = dev_get_drvdata(dev); int rc; @@ -114,10 +110,8 @@ static int dev_dax_kmem_remove(struct device *dev) } /* Release and free dax resources */ - release_resource(res); - kfree(res); + release_mem_region(range.start, range_len(&range)); kfree(res_name); - dev_dax->dax_kmem_res = NULL; return 0; } _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org
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From: Dan Williams <dan.j.williams@intel.com> To: akpm@linux-foundation.org Cc: David Hildenbrand <david@redhat.com>, Vishal Verma <vishal.l.verma@intel.com>, Dave Hansen <dave.hansen@linux.intel.com>, Pavel Tatashin <pasha.tatashin@soleen.com>, Brice Goglin <Brice.Goglin@inria.fr>, Dave Jiang <dave.jiang@intel.com>, David Hildenbrand <david@redhat.com>, Ira Weiny <ira.weiny@intel.com>, Jia He <justin.he@arm.com>, Joao Martins <joao.m.martins@oracle.com>, Jonathan Cameron <Jonathan.Cameron@huawei.com>, linux-mm@kvack.org, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 04/17] device-dax/kmem: replace release_resource() with release_mem_region() Date: Fri, 25 Sep 2020 12:12:02 -0700 [thread overview] Message-ID: <160106112239.30709.15909567572288425294.stgit@dwillia2-desk3.amr.corp.intel.com> (raw) In-Reply-To: <160106109960.30709.7379926726669669398.stgit@dwillia2-desk3.amr.corp.intel.com> Towards removing the mode specific @dax_kmem_res attribute from the generic 'struct dev_dax', and preparing for multi-range support, change the kmem driver to use the idiomatic release_mem_region() to pair with the initial request_mem_region(). This also eliminates the need to open code the release of the resource allocated by request_mem_region(). As there are no more dax_kmem_res users, delete this struct member. Cc: David Hildenbrand <david@redhat.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Brice Goglin <Brice.Goglin@inria.fr> Cc: Dave Jiang <dave.jiang@intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Jia He <justin.he@arm.com> Cc: Joao Martins <joao.m.martins@oracle.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- drivers/dax/dax-private.h | 3 --- drivers/dax/kmem.c | 20 +++++++------------- 2 files changed, 7 insertions(+), 16 deletions(-) diff --git a/drivers/dax/dax-private.h b/drivers/dax/dax-private.h index 6779f683671d..12a2dbc43b40 100644 --- a/drivers/dax/dax-private.h +++ b/drivers/dax/dax-private.h @@ -42,8 +42,6 @@ struct dax_region { * @dev - device core * @pgmap - pgmap for memmap setup / lifetime (driver owned) * @range: resource range for the instance - * @dax_mem_res: physical address range of hotadded DAX memory - * @dax_mem_name: name for hotadded DAX memory via add_memory_driver_managed() */ struct dev_dax { struct dax_region *region; @@ -52,7 +50,6 @@ struct dev_dax { struct device dev; struct dev_pagemap *pgmap; struct range range; - struct resource *dax_kmem_res; }; static inline u64 range_len(struct range *range) diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c index 6fe2cb1c5f7c..e56fc688bdc5 100644 --- a/drivers/dax/kmem.c +++ b/drivers/dax/kmem.c @@ -33,7 +33,7 @@ int dev_dax_kmem_probe(struct device *dev) { struct dev_dax *dev_dax = to_dev_dax(dev); struct range range = dax_kmem_range(dev_dax); - struct resource *new_res; + struct resource *res; char *res_name; int numa_node; int rc; @@ -56,8 +56,8 @@ int dev_dax_kmem_probe(struct device *dev) return -ENOMEM; /* Region is permanently reserved if hotremove fails. */ - new_res = request_mem_region(range.start, range_len(&range), res_name); - if (!new_res) { + res = request_mem_region(range.start, range_len(&range), res_name); + if (!res) { dev_warn(dev, "could not reserve region [%#llx-%#llx]\n", range.start, range.end); kfree(res_name); return -EBUSY; @@ -69,23 +69,20 @@ int dev_dax_kmem_probe(struct device *dev) * inherit flags from the parent since it may set new flags * unknown to us that will break add_memory() below. */ - new_res->flags = IORESOURCE_SYSTEM_RAM; + res->flags = IORESOURCE_SYSTEM_RAM; /* * Ensure that future kexec'd kernels will not treat this as RAM * automatically. */ - rc = add_memory_driver_managed(numa_node, new_res->start, - resource_size(new_res), kmem_name); + rc = add_memory_driver_managed(numa_node, range.start, range_len(&range), kmem_name); if (rc) { - release_resource(new_res); - kfree(new_res); + release_mem_region(range.start, range_len(&range)); kfree(res_name); return rc; } dev_set_drvdata(dev, res_name); - dev_dax->dax_kmem_res = new_res; return 0; } @@ -95,7 +92,6 @@ static int dev_dax_kmem_remove(struct device *dev) { struct dev_dax *dev_dax = to_dev_dax(dev); struct range range = dax_kmem_range(dev_dax); - struct resource *res = dev_dax->dax_kmem_res; const char *res_name = dev_get_drvdata(dev); int rc; @@ -114,10 +110,8 @@ static int dev_dax_kmem_remove(struct device *dev) } /* Release and free dax resources */ - release_resource(res); - kfree(res); + release_mem_region(range.start, range_len(&range)); kfree(res_name); - dev_dax->dax_kmem_res = NULL; return 0; }
next prev parent reply other threads:[~2020-09-25 19:30 UTC|newest] Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-09-25 19:11 [PATCH v5 00/17] device-dax: support sub-dividing soft-reserved ranges Dan Williams 2020-09-25 19:11 ` Dan Williams 2020-09-25 19:11 ` [PATCH v5 01/17] device-dax: make pgmap optional for instance creation Dan Williams 2020-09-25 19:11 ` Dan Williams 2020-10-01 8:41 ` David Hildenbrand 2020-10-01 8:41 ` David Hildenbrand 2020-10-01 16:54 ` Dan Williams 2020-10-01 16:54 ` Dan Williams 2020-10-01 16:54 ` Dan Williams 2020-10-01 17:39 ` David Hildenbrand 2020-10-01 17:39 ` David Hildenbrand 2020-10-01 19:12 ` Dan Williams 2020-10-01 19:12 ` Dan Williams 2020-10-01 19:12 ` Dan Williams 2020-09-25 19:11 ` [PATCH v5 02/17] device-dax/kmem: introduce dax_kmem_range() Dan Williams 2020-09-25 19:11 ` Dan Williams 2020-09-30 16:14 ` David Hildenbrand 2020-09-30 16:14 ` David Hildenbrand 2020-09-25 19:11 ` [PATCH v5 03/17] device-dax/kmem: move resource name tracking to drvdata Dan Williams 2020-09-25 19:11 ` Dan Williams 2020-09-30 16:19 ` David Hildenbrand 2020-09-30 16:19 ` David Hildenbrand 2020-09-25 19:12 ` Dan Williams [this message] 2020-09-25 19:12 ` [PATCH v5 04/17] device-dax/kmem: replace release_resource() with release_mem_region() Dan Williams 2020-09-30 16:23 ` David Hildenbrand 2020-09-30 16:23 ` David Hildenbrand 2020-09-30 17:28 ` Dan Williams 2020-09-30 17:28 ` Dan Williams 2020-09-30 17:28 ` Dan Williams 2020-09-25 19:12 ` [PATCH v5 05/17] device-dax: add an allocation interface for device-dax instances Dan Williams 2020-09-25 19:12 ` Dan Williams 2020-09-25 19:12 ` [PATCH v5 06/17] device-dax: introduce 'struct dev_dax' typed-driver operations Dan Williams 2020-09-25 19:12 ` Dan Williams 2020-09-25 19:12 ` [PATCH v5 07/17] device-dax: introduce 'seed' devices Dan Williams 2020-09-25 19:12 ` Dan Williams 2020-09-25 19:12 ` [PATCH v5 08/17] drivers/base: make device_find_child_by_name() compatible with sysfs inputs Dan Williams 2020-09-25 19:12 ` Dan Williams 2020-09-25 19:12 ` [PATCH v5 09/17] device-dax: add resize support Dan Williams 2020-09-25 19:12 ` Dan Williams 2020-09-25 19:12 ` [PATCH v5 10/17] mm/memremap_pages: convert to 'struct range' Dan Williams 2020-09-25 19:12 ` Dan Williams 2020-09-28 19:12 ` boris.ostrovsky 2020-09-28 19:12 ` boris.ostrovsky 2020-09-25 19:12 ` [PATCH v5 11/17] mm/memremap_pages: support multiple ranges per invocation Dan Williams 2020-09-25 19:12 ` Dan Williams 2020-09-25 19:12 ` [PATCH v5 12/17] device-dax: add dis-contiguous resource support Dan Williams 2020-09-25 19:12 ` Dan Williams 2020-09-25 19:12 ` [PATCH v5 13/17] device-dax: introduce 'mapping' devices Dan Williams 2020-09-25 19:12 ` Dan Williams 2020-09-25 19:12 ` [PATCH v5 14/17] device-dax: make align a per-device property Dan Williams 2020-09-25 19:12 ` Dan Williams 2020-09-25 19:13 ` [PATCH v5 15/17] device-dax: add an 'align' attribute Dan Williams 2020-09-25 19:13 ` Dan Williams 2020-09-26 2:22 ` Andrew Morton 2020-09-26 2:22 ` Andrew Morton 2020-09-26 3:31 ` Dan Williams 2020-09-26 3:31 ` Dan Williams 2020-09-26 3:31 ` Dan Williams 2020-09-25 19:13 ` [PATCH v5 16/17] dax/hmem: introduce dax_hmem.region_idle parameter Dan Williams 2020-09-25 19:13 ` Dan Williams 2020-09-25 19:13 ` [PATCH v5 17/17] device-dax: add a range mapping allocation attribute Dan Williams 2020-09-25 19:13 ` Dan Williams 2020-09-25 20:51 ` [PATCH v5 00/17] device-dax: support sub-dividing soft-reserved ranges Joao Martins 2020-09-25 20:51 ` Joao Martins 2020-09-25 21:01 ` Dan Williams 2020-09-25 21:01 ` Dan Williams 2020-09-25 21:05 ` Joao Martins 2020-09-25 21:05 ` Joao Martins
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