mm: Fix memory size alignment in devm_memremap_pages_release()
commitpull/10/head10a0cd6e49
upstream. The functions devm_memremap_pages() and devm_memremap_pages_release() use different ways to calculate the section-aligned amount of memory. The latter function may use an incorrect size if the memory region is small but straddles a section border. Use the same code for both. Cc: <stable@vger.kernel.org> Fixes:5f29a77cd9
("mm: fix mixed zone detection in devm_memremap_pages") Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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568c61facc
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1f21cd46ca
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@ -301,7 +301,8 @@ static void devm_memremap_pages_release(struct device *dev, void *data)
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/* pages are dead and unused, undo the arch mapping */
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align_start = res->start & ~(SECTION_SIZE - 1);
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align_size = ALIGN(resource_size(res), SECTION_SIZE);
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align_size = ALIGN(res->start + resource_size(res), SECTION_SIZE)
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- align_start;
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mem_hotplug_begin();
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arch_remove_memory(align_start, align_size);
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