From: Dan Williams <dan.j.williams@intel.com>
To: akpm@linux-foundation.org
Cc: Matthew Wilcox <willy@linux.intel.com>,
Ross Zwisler <ross.zwisler@linux.intel.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH] phys_to_pfn_t: use phys_addr_t
Date: Fri, 22 Jan 2016 09:51:14 -0800 [thread overview]
Message-ID: <20160122175114.38521.76801.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
A dma_addr_t is potentially smaller than a phys_addr_t on some archs.
Don't truncate the address when doing the pfn conversion.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reported-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
include/linux/pfn_t.h | 2 +-
kernel/memremap.c | 2 +-
tools/testing/nvdimm/test/iomap.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/pfn_t.h b/include/linux/pfn_t.h
index 0703b5360d31..98145a17c1eb 100644
--- a/include/linux/pfn_t.h
+++ b/include/linux/pfn_t.h
@@ -29,7 +29,7 @@ static inline pfn_t pfn_to_pfn_t(unsigned long pfn)
return __pfn_to_pfn_t(pfn, 0);
}
-extern pfn_t phys_to_pfn_t(dma_addr_t addr, unsigned long flags);
+extern pfn_t phys_to_pfn_t(phys_addr_t addr, unsigned long flags);
static inline bool pfn_t_has_page(pfn_t pfn)
{
diff --git a/kernel/memremap.c b/kernel/memremap.c
index e517a16cb426..7f6d08f41d72 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -150,7 +150,7 @@ void devm_memunmap(struct device *dev, void *addr)
}
EXPORT_SYMBOL(devm_memunmap);
-pfn_t phys_to_pfn_t(dma_addr_t addr, unsigned long flags)
+pfn_t phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
{
return __pfn_to_pfn_t(addr >> PAGE_SHIFT, flags);
}
diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
index 7ec7df9e7fc7..0c1a7e65bb81 100644
--- a/tools/testing/nvdimm/test/iomap.c
+++ b/tools/testing/nvdimm/test/iomap.c
@@ -113,7 +113,7 @@ void *__wrap_devm_memremap_pages(struct device *dev, struct resource *res,
}
EXPORT_SYMBOL(__wrap_devm_memremap_pages);
-pfn_t __wrap_phys_to_pfn_t(dma_addr_t addr, unsigned long flags)
+pfn_t __wrap_phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
{
struct nfit_test_resource *nfit_res = get_nfit_res(addr);
--
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next reply other threads:[~2016-01-22 17:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-22 17:51 Dan Williams [this message]
2016-01-22 18:46 ` [PATCH] phys_to_pfn_t: use phys_addr_t Matthew Wilcox
2016-01-22 18:50 ` [PATCH v2] " Dan Williams
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