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devm_memremap_release(): fix memremap'd addr handling

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The pmem driver calls devm_memremap() to map a persistent memory range.
When the pmem driver is unloaded, this memremap'd range is not released
so the kernel will leak a vma.

Fix devm_memremap_release() to handle a given memremap'd address
properly.

Signed-off-by: Toshi Kani <[email protected]>
Acked-by: Dan Williams <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Ross Zwisler <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Toshi Kani 2016-02-17 13:11:29 -08:00 • committed by Linus Torvalds
commit 9273a8bbf5
1 changed files with 1 additions and 1 deletions
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2
kernel/memremap.c
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@ -114,7 +114,7 @@ EXPORT_SYMBOL(memunmap);
static void devm_memremap_release(struct device *dev, void *res)
{
memunmap(res);
memunmap(*(void **)res);
}
static int devm_memremap_match(struct device *dev, void *res, void *match_data)