From: Dan Williams <dan.j.williams@intel.com> To: akpm@linux-foundation.org Cc: "Michal Hocko" <mhocko@suse.com>, "Jérôme Glisse" <jglisse@redhat.com>, "Christoph Hellwig" <hch@lst.de>, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/7] mm, devm_memremap_pages: Mark devm_memremap_pages() EXPORT_SYMBOL_GPL Date: Tue, 22 May 2018 22:10:22 -0700 [thread overview] Message-ID: <152705222281.21414.13452614856895978739.stgit@dwillia2-desk3.amr.corp.intel.com> (raw) In-Reply-To: <152705221686.21414.771870778478134768.stgit@dwillia2-desk3.amr.corp.intel.com> The devm_memremap_pages() facility is tightly integrated with the kernel's memory hotplug functionality. It injects an altmap argument deep into the architecture specific vmemmap implementation to allow allocating from specific reserved pages, and it has Linux specific assumptions about page structure reference counting relative to get_user_pages() and get_user_pages_fast(). It was an oversight that this was not marked EXPORT_SYMBOL_GPL from the outset. Cc: Michal Hocko <mhocko@suse.com> Cc: "Jérôme Glisse" <jglisse@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- kernel/memremap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index 895e6b76b25e..c614645227a7 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -429,7 +429,7 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap) pgmap_radix_release(res, pgoff); return ERR_PTR(error); } -EXPORT_SYMBOL(devm_memremap_pages); +EXPORT_SYMBOL_GPL(devm_memremap_pages); unsigned long vmem_altmap_offset(struct vmem_altmap *altmap) {
WARNING: multiple messages have this Message-ID (diff)
From: Dan Williams <dan.j.williams@intel.com> To: akpm@linux-foundation.org Cc: "Michal Hocko" <mhocko@suse.com>, "Jérôme Glisse" <jglisse@redhat.com>, "Christoph Hellwig" <hch@lst.de>, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/7] mm, devm_memremap_pages: Mark devm_memremap_pages() EXPORT_SYMBOL_GPL Date: Tue, 22 May 2018 22:10:22 -0700 [thread overview] Message-ID: <152705222281.21414.13452614856895978739.stgit@dwillia2-desk3.amr.corp.intel.com> (raw) In-Reply-To: <152705221686.21414.771870778478134768.stgit@dwillia2-desk3.amr.corp.intel.com> The devm_memremap_pages() facility is tightly integrated with the kernel's memory hotplug functionality. It injects an altmap argument deep into the architecture specific vmemmap implementation to allow allocating from specific reserved pages, and it has Linux specific assumptions about page structure reference counting relative to get_user_pages() and get_user_pages_fast(). It was an oversight that this was not marked EXPORT_SYMBOL_GPL from the outset. Cc: Michal Hocko <mhocko@suse.com> Cc: "JA(C)rA'me Glisse" <jglisse@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- kernel/memremap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index 895e6b76b25e..c614645227a7 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -429,7 +429,7 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap) pgmap_radix_release(res, pgoff); return ERR_PTR(error); } -EXPORT_SYMBOL(devm_memremap_pages); +EXPORT_SYMBOL_GPL(devm_memremap_pages); unsigned long vmem_altmap_offset(struct vmem_altmap *altmap) {
next prev parent reply other threads:[~2018-05-23 5:20 UTC|newest] Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-05-23 5:10 [PATCH v2 0/7] mm: Rework hmm to use devm_memremap_pages Dan Williams 2018-05-23 5:10 ` Dan Williams [this message] 2018-05-23 5:10 ` [PATCH v2 1/7] mm, devm_memremap_pages: Mark devm_memremap_pages() EXPORT_SYMBOL_GPL Dan Williams 2018-05-23 5:10 ` [PATCH v2 2/7] mm, devm_memremap_pages: Kill mapping "System RAM" support Dan Williams 2018-05-23 5:10 ` Dan Williams 2018-05-23 5:10 ` [PATCH v2 3/7] mm, devm_memremap_pages: Fix shutdown handling Dan Williams 2018-05-23 5:10 ` Dan Williams 2018-05-23 15:47 ` Logan Gunthorpe 2018-05-23 15:55 ` Dan Williams 2018-05-23 5:10 ` [PATCH v2 4/7] mm, devm_memremap_pages: Add MEMORY_DEVICE_PRIVATE support Dan Williams 2018-05-23 5:10 ` Dan Williams 2018-05-23 15:48 ` Logan Gunthorpe 2018-05-23 15:48 ` Logan Gunthorpe 2018-05-23 5:10 ` [PATCH v2 5/7] mm, hmm: Use devm semantics for hmm_devmem_{add, remove} Dan Williams 2018-05-23 5:10 ` Dan Williams 2018-05-23 5:10 ` [PATCH v2 6/7] mm, hmm: Replace hmm_devmem_pages_create() with devm_memremap_pages() Dan Williams 2018-05-23 5:10 ` Dan Williams 2018-05-23 5:10 ` [PATCH v2 7/7] mm, hmm: Mark hmm_devmem_{add, add_resource} EXPORT_SYMBOL_GPL Dan Williams 2018-05-23 5:10 ` Dan Williams
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