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| author | Jan H. Schönherr <jschoenh@amazon.de> | 2018-01-19 16:27:54 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-01-19 16:29:48 -0800 |
| commit | 10a0cd6e4932b5078215b1ec2c896597eec0eff9 (patch) | |
| tree | ebe957829554ccf069566daa5c8ab68e4b346d4a /kernel/memremap.c | |
| parent | e697c5b90e97792187e45f8d78fb2bfa62eb0496 (diff) | |
| download | linux-10a0cd6e4932b5078215b1ec2c896597eec0eff9.tar.bz2 | |
mm: Fix memory size alignment in devm_memremap_pages_release()
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: 5f29a77cd957 ("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>
Diffstat (limited to 'kernel/memremap.c')
| -rw-r--r-- | kernel/memremap.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/memremap.c b/kernel/memremap.c index ada31b0d76d4..4ef97525a4ff 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -293,7 +293,8 @@ static void devm_memremap_pages_release(void *data) /* pages are dead and unused, undo the arch mapping */ align_start = res->start & ~(SECTION_SIZE - 1); - align_size = ALIGN(resource_size(res), SECTION_SIZE); + align_size = ALIGN(res->start + resource_size(res), SECTION_SIZE) + - align_start; mem_hotplug_begin(); arch_remove_memory(align_start, align_size, pgmap->altmap_valid ? |